CN105954169A - Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric - Google Patents
Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric Download PDFInfo
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- CN105954169A CN105954169A CN201610247134.2A CN201610247134A CN105954169A CN 105954169 A CN105954169 A CN 105954169A CN 201610247134 A CN201610247134 A CN 201610247134A CN 105954169 A CN105954169 A CN 105954169A
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- 239000004744 fabric Substances 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000000835 fiber Substances 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 73
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 230000035699 permeability Effects 0.000 claims description 26
- 238000009736 wetting Methods 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 14
- 238000005303 weighing Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 20
- 239000004033 plastic Substances 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 1
- 238000001465 metallisation Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003733 fiber-reinforced composite Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011160 polymer matrix composite Substances 0.000 description 1
- 229920013657 polymer matrix composite Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to a measuring method and measuring system for the thickness-direction steady-state permeation rate of a fiber fabric and discloses the method for measuring the thickness-direction steady-state permeation rate of the fiber fabric by using the system. The system comprises an air compressor, a pressure regulating valve, a liquid storage tank, a valve, a pressure gauge, a plastic pipe and a die, wherein the die is composed of an external metal framework, a tubular tank, a porous sieve plate, a thickness adjusting cushion block, etc. In the process of an experiment, the total thickness of the fiber fabric after die locking is controlled by adjusting a nut; different injection pressures are obtained by adjusting the pressure regulating valve; the air compressor provides an injection pressure of 0.1 to 0.2 MPa for measurement of the permeation rate of the fiber fabric; and the thickness-direction permeation rate of the fiber fabric is calculated by measuring the mass of liquid flowing out from the totally-infiltrated fiber fabric in a certain period of time. Thus, the thickness-direction steady-state permeation rates of fiber fabrics with different thicknesses at different pressures can be measured.
Description
Technical field
The invention belongs to resin base fiber reinforced composite material liquid condition shaping technical field, be specifically related to a kind of fabric
Thick measuring method to steady-state permeation rate and the system of measurement, and use this systematic survey fabric thick to steady-state permeation
The method of rate.
Background technology
Permeability is to be characterized in fluid under pressure effect to flow in porous media the parameter of complexity, thick to permeability
It is that reflection fluid is by the parameter of suffered resistance situation, permeability the biggest expression porous media during fabric thickness direction
The flow resistance of convection cell is the least.RTM injection moulding or vacuum bag technique is used to prepare the process of polymer matrix composites
In, the permeability of preform is prediction composite liquid condition shaping technique mold filling process, carries out Design of Dies and technique
The important parameter optimized, affects one of key factor that under vacuum action, resin flowing and gas are discharged, thus necessarily
The Forming Quality of composite product is affected in degree.The mold filling process of current most of liquid condition shaping technique and excellent
Change design and be only limitted to face intrinsic permeability, and for manufacturing the composite of complicated shape and structure, only obtain face endosmosis
Rate is far from enough meeting actual requirement thoroughly.Along with the application of composite material structural member is more and more extensive, preform
The variation of structure, fabric is thick more and more significant to measurement apparatus and the implementation method of permeability.
In existing fabric thickness direction permeability test device, patent 200710099160.6 " fiber laying
In face and thickness direction permeability test device and saturated permeability method of testing " and patent 201210301604.0 "
Plant fabric thickness direction permeability test device and method of testing " the identical number of plies under different injection pressure can not be tested
Under the permeability of fabric and uniform pressure different number of plies fabrics permeability and also apparatus structure is complicated, one-tenth
This height, operation complexity.
Summary of the invention
Solve the technical problem that
In place of the deficiencies in the prior art, it is thick to the measurement of steady-state permeation rate that the present invention proposes a kind of fabric
Method and the system of measurement, and use this systematic survey fabric thick to the method for steady-state permeation rate.
Technical scheme
A kind of fabric is thick to the measuring method of steady-state permeation rate, it is characterised in that:
Step 1: with liquid complete wetting fabric；
Step 2: wetting fibre fabric thickness to apply 0.1～0.2MPa pressure P0；
Step 3: calculate fabric thick to permeabilityThe quality that in wherein m is the t time, liquid flows out,
S is that liquid flows through cross-sectional area, and L is fabric thickness, and K is permeability, P0For the pressure applied, μ is liquid
The viscosity of body, ρ is the density of liquid.
A kind of described fabric thickness that realizes is to the system of the measuring method of steady-state permeation rate, it is characterised in that include air
Compressor 1, pressure-regulating valve 2, fluid reservoir 3, valve 4, Pressure gauge 5, mould 6 and balance 7；Air compressor
1 connects fluid reservoir 3 by pressure-regulating valve 2 pipeline, and fluid reservoir 3 is entered by valve 4 pipeline connecting mold 6 lower end
Liquid mouth, the liquid outlet tube outlet of mould 6 upper end is placed in the scale pan on balance 7；Described mould 6 includes liquid outlet pipe
Road 12,14, two pieces of porous sieve plates 15 of tubular tank and piston rod 16；Two pieces match many with tubular tank 14 internal diameter
Hole sizer plate 15 is positioned at tubular tank 14, and the lower end of tubular tank 14 is provided with inlet, and upper end is provided with piston rod 16, side
Wall is provided with liquid outlet pipeline 12, and is positioned at the upper end of porous sieve plate 15.
The upper end of described piston rod 16 adjusting nut 10 is provided with the thickness adjusted cushion block 9 controlling fabric thickness.
A kind of to utilize described system to carry out fabric thick to the measuring method of steady-state permeation rate, it is characterised in that step is such as
Under:
Step 1: by die surface wiped clean, dry, then uses two pieces of porous sieve plates to clamp tested fabric
Rear one is placed in tubular tank 14, and makes liquid outlet pipeline 12 be positioned at the upper end of porous sieve plate；Use on piston rod
Mat thickness regulation cushion block adjusting nut controls fabric thickness；
Step 2: open air compressor, opens valve, is noted in tubular tank by the inlet of mould 6 lower end
Entering liquid, liquid passes porous sieve plate wetting fibre fabric, when the liquid outlet pipeline 12 of tubular tank has liquid to flow out,
Think liquid complete wetting fabric；
Step 3: regulation pressure valve, after reaching required injection pressure, goes out from tubular tank in weighing the t time by balance
Quality m of the liquid that mouth flows out, according toSolving fabric thick to steady-state permeation rate K, in formula, m is one
Liquid in t of fixing time flows out quality, and s is that liquid flows through cross-sectional area, and L is fabric thickness, P0For injection pressure
Power, μ is the viscosity of liquid, and ρ is the density of liquid.
Beneficial effect
The thick measuring method to steady-state permeation rate of a kind of fabric that the present invention proposes and the system of measurement, and use should
Systematic survey fabric is thick to the method for steady-state permeation rate.Device includes air compressor, pressure-regulating valve, liquid storage
Tank, valve, Pressure gauge, plastic tube, mould, wherein mould is by external metallization framework, tubular tank, porous sieve plate,
Thickness adjusted cushion blocks etc. are constituted, the internal a diameter of 50mm of die cavity.In experimentation, the gross thickness of fabric after matched moulds
Control realized by adjusting nut.Different injection pressures is obtained by regulation pressure-regulating valve.Compressed by air
Machine provides the injection pressure of 0.1～0.2MPa to fabric permeability survey, by the fiber after measurement complete wetting
The liquid quality that fabric flows out within a certain period of time is to calculate the thickness of fabric to permeability.Thus realize different pressures
Under, different-thickness fabric is thick to the measurement of steady-state permeation rate.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of measurement apparatus
Fig. 2 is mould 6 schematic diagram
Wherein: 1, air compressor 2, pressure-regulating valve 3, fluid reservoir 4, valve 5, Pressure gauge 6,
Mould 7, balance 8, camera 9, thickness adjusted cushion block 10, adjusting nut 11, external metallization framework 12,
Plastic tube 13, fabric 14, tubular tank 15, porous sieve plate 16, piston rod.
Detailed description of the invention
In conjunction with embodiment, accompanying drawing, the invention will be further described:
, the inventive method, it is therefore intended that be mainly used in measuring the permeability of identical number of plies fabric under different injection pressure
And the permeability of different number of plies fabrics under uniform pressure.This measuring method passes through air compressor to fabric
Permeability survey provides pressure, the liquid quality flowed out within a certain period of time by the fabric after measuring complete wetting
Estimate the permeability of fabric.
Estimation fabric is thick to the formula of permeability
In wherein m is certain time t, liquid flows out quality, and s is that liquid flows through cross-sectional area, and L is that fabric is thick
Degree, K is permeability, P0For injection pressure, μ is the viscosity of liquid, and ρ is the density of liquid.
Measurement apparatus includes air compressor, pressure-regulating valve, fluid reservoir, valve, Pressure gauge, plastic tube, mould,
Wherein mould is made up of external metallization framework, tubular tank, porous sieve plate, thickness adjusted cushion block etc., internal die cavity diameter
For 50mm.In experimentation, after matched moulds, the control of the gross thickness of fabric is realized by adjusting nut.By regulation
Pressure-regulating valve obtains different injection pressures.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: given by air compressor
Fabric permeability survey provides the pressure of 0.1～0.2MPa, by the fabric after measurement complete wetting one
Fix time the liquid quality of interior outflow to calculate the permeability of fabric.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: regulated by regulation pressure
Valve, can measure fabric under different pressures thick to steady-state permeation rate.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: by mat thickness spacer
It is thick to the measurement of steady-state permeation rate that block adjusting nut realize different-thickness fabric.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: the mold filling mistake of fabric
Journey is carried out in tubular tank, and the good air-tightness of this device ensure that the accuracy of experimental result.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: this test device versatility
By force, can measure different materials, different geometric configuration fabrics are thick to steady-state permeation rate.
Described a kind of fabric is thick to the measurement apparatus of steady-state permeation rate, it is characterised in that: porous sieve plate is that band is some
The corrosion resistant plate of circular hole, beneficially synchronised fluid, evenly flow into outflow fabric, and ensure the flat of fabric
Whole property, increases the accuracy of thickness direction permeability test.
Described a kind of fabric is to the measuring method of steady-state permeation rate, it is characterised in that: comprise the following steps:
Step 1: open tubular tank, with acetone equal solvent by die surface wiped clean, dries；Divide in tubular tank
Do not put into porous sieve plate, fabric, porous sieve plate, by the regulation cushion block of mat thickness on the piston rod adjusting nut
Realize fabric THICKNESS CONTROL.
Step 2: open air compressor, opens valve, injects liquid, make the liquid in tubular tank in tubular tank
Body wetting fibre fabric, when the outlet of tubular tank has liquid to flow out, it is believed that liquid complete wetting fabric.
Step 3: after liquid complete wetting fabric, regulates pressure valve, after reaching required injection pressure, passes through
Quality m of the liquid that balance flows out from the outlet of tubular tank in weighing the t time, by formulaSolve fabric
Thick to steady-state permeation rate K, in formula, m is certain time t, liquid flows out quality, and s is that liquid flows through cross-sectional area,
L is fabric thickness, P0For injection pressure, μ is the viscosity of liquid, and ρ is the density of liquid.
Referring to the drawings, the fabric in the present embodiment thick to the measurement apparatus of steady-state permeation rate include air compressor 1,
Pressure-regulating valve 2, fluid reservoir 3, valve 4, Pressure gauge 5, mould 6, wherein mould 6 by thickness adjusted cushion block 9,
Adjusting nut 10, external metallization framework 11, tubular tank 14, porous sieve plate 15 are constituted, the internal die cavity diameter of tubular tank
For 50mm.Tubular tank 14 is fixed on external metallization framework 11, has an adjusting nut 10 on piston rod 16 top,
By the regulation cushion block of mat thickness between adjusting nut 10 and external metallization framework 11 and screw adjusting nut and realize to be measured
The thickness adjusted of fabric.
In experimentation, after matched moulds, the control of the gross thickness of fabric is realized by adjusting nut.By regulation pressure
Regulation valve obtains different injection pressures.Air compressor is needed to provide pressure owing to measuring the device of fabric permeability
Power, so device needs to be attached with screw thread and raw material band in connection procedure.This device uses pointer-type pressure
Table, so add valve in installation process, in order to saves the time of regulation pressure.Test fluid is in compressed air
Promotion under, from mold bottom center inject, sidewall flow out.Balance convection cell is utilized to weigh, taking the photograph of top
The change of camera recording liquid weight.The body in the unit interval can be solved according to the change of fluid mass in certain time
Long-pending flow Q.
The method of testing of the fabric thickness direction steady-state permeation rate of the present embodiment, comprises the steps:
Step 1: open tubular tank, with acetone equal solvent by die surface wiped clean, dries；Divide in tubular tank
Do not put into porous sieve plate, fabric, porous sieve plate, by the regulation cushion block of mat thickness on the piston rod adjusting nut
Realize fabric THICKNESS CONTROL.
Step 2: open air compressor, opens valve, injects liquid, make the liquid in tubular tank in tubular tank
Body wetting fibre fabric, when the outlet of tubular tank has liquid to flow out, it is believed that liquid complete wetting fabric.
Step 3: after liquid complete wetting fibre bundle, regulates pressure valve, after reaching required injection pressure, by sky
Flat quality m weighing the t time interior liquid flowed out from the outlet of tubular tank, by formulaSolve fabric thick
To steady-state permeation rate K, in formula, m is certain time t, liquid flows out quality, and s is that liquid flows through cross-sectional area, L
For fabric thickness, P0For injection pressure, μ is the viscosity of liquid, and ρ is the density of liquid.
The present invention is compared to existing technology, it is achieved that under different pressures, and different-thickness fabric is thick to steady-state permeation rate
Measure.It is simple that it measures process, and workable, experimental data is reliable.
Claims (4)
1. a fabric is thick to the measuring method of steady-state permeation rate, it is characterised in that:
Step 1: with liquid complete wetting fabric；
Step 2: wetting fibre fabric thickness to apply 0.1～0.2MPa pressure P0；
Step 3: calculate fabric thick to permeabilityThe quality that in wherein m is the t time, liquid flows out,
S is that liquid flows through cross-sectional area, and L is fabric thickness, and K is permeability, P0For the pressure applied, μ is liquid
The viscosity of body, ρ is the density of liquid.
2. realizing fabric described in claim 1 thick to a system for the measuring method of steady-state permeation rate, its feature exists
In include air compressor (1), pressure-regulating valve (2), fluid reservoir (3), valve (4), Pressure gauge (5),
Mould (6) and balance (7)；Air compressor (1) connects fluid reservoir (3) by pressure-regulating valve (2) pipeline,
The fluid reservoir (3) inlet by valve (4) pipeline connecting mold (6) lower end, mould (6) upper end
Liquid outlet tube outlet is placed in the scale pan on balance (7)；Described mould (6) include liquid outlet pipeline (12),
Tubular tank (14), two pieces of porous sieve plates (15) and piston rod (16)；Two pieces with tubular tank (14) internal diameter phase
The porous sieve plate (15) coincideing is positioned at tubular tank (14), and the lower end of tubular tank (14) is provided with inlet,
Upper end is provided with piston rod (16), and sidewall is provided with liquid outlet pipeline (12), and is positioned at the upper of porous sieve plate (15)
End.
The most according to claim 2, fabric is thick to the system of the measuring method of steady-state permeation rate, it is characterised in that:
The upper end of described piston rod (16) adjusting nut (10) is provided with the thickness adjusted cushion block controlling fabric thickness
(9)。
4. utilize system described in claim 2 or 3 to carry out fabric thick to a measuring method for steady-state permeation rate, its
It is characterised by that step is as follows:
Step 1: by die surface wiped clean, dry, then uses two pieces of porous sieve plates to clamp tested fabric
Rear one is placed in tubular tank (14), and makes liquid outlet pipeline (12) be positioned at the upper end of porous sieve plate；Use and live
On stopper rod, mat thickness regulation cushion block adjusting nut controls fabric thickness；
Step 2: open air compressor, opens valve, by the inlet of mould (6) lower end in tubular tank
Injecting liquid, liquid passes porous sieve plate wetting fibre fabric, when the liquid outlet pipeline (12) of tubular tank has liquid stream
When going out, it is believed that liquid complete wetting fabric；
Step 3: regulation pressure valve, after reaching required injection pressure, goes out from tubular tank in weighing the t time by balance
Quality m of the liquid that mouth flows out, according toSolving fabric thick to steady-state permeation rate K, in formula, m is one
Liquid in t of fixing time flows out quality, and s is that liquid flows through cross-sectional area, and L is fabric thickness, P0For injection pressure
Power, μ is the viscosity of liquid, and ρ is the density of liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610247134.2A CN105954169A (en) | 2016-04-20 | 2016-04-20 | Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610247134.2A CN105954169A (en) | 2016-04-20 | 2016-04-20 | Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric |
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| Publication Number | Publication Date |
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| CN105954169A true CN105954169A (en) | 2016-09-21 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610247134.2A Pending CN105954169A (en) | 2016-04-20 | 2016-04-20 | Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841005A (en) * | 2017-02-07 | 2017-06-13 | 湖南大学 | Test the device and its application system and method for liquid Composite Permeability rate |
| CN106872333A (en) * | 2017-03-08 | 2017-06-20 | 西北工业大学 | The measuring method and measuring system of a kind of fabric face intrinsic permeability |
| CN112082919A (en) * | 2020-08-21 | 2020-12-15 | 西南交通大学 | Device for testing permeability of graded broken stone-high polymer grouting solidified body |
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| CN1651899A (en) * | 2005-02-25 | 2005-08-10 | 天津工业大学 | Method for testing external permeability of fibre fabre surface |
| CN101051019A (en) * | 2007-05-15 | 2007-10-10 | 北京航空航天大学 | Permeability detecting device and saturated permeability detecting method fiber spread layer surface and thickness direction |
| CN102778424A (en) * | 2012-08-22 | 2012-11-14 | 山东大学 | Fabric thickness directional permeability testing device and testing method |
| JP2013228384A (en) * | 2012-03-28 | 2013-11-07 | Daiki Rika Kogyo Kk | Infiltration measuring device |
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2016
- 2016-04-20 CN CN201610247134.2A patent/CN105954169A/en active Pending
Patent Citations (4)
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| CN1651899A (en) * | 2005-02-25 | 2005-08-10 | 天津工业大学 | Method for testing external permeability of fibre fabre surface |
| CN101051019A (en) * | 2007-05-15 | 2007-10-10 | 北京航空航天大学 | Permeability detecting device and saturated permeability detecting method fiber spread layer surface and thickness direction |
| JP2013228384A (en) * | 2012-03-28 | 2013-11-07 | Daiki Rika Kogyo Kk | Infiltration measuring device |
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| LIANGCHAO FANG ET AL: "Effect of Nesting on the Out-of-Plane Permeability of Unidirectional Fabrics in Resin Transfer Molding", 《APPL COMPOS MATER》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841005A (en) * | 2017-02-07 | 2017-06-13 | 湖南大学 | Test the device and its application system and method for liquid Composite Permeability rate |
| CN106841005B (en) * | 2017-02-07 | 2019-04-30 | 湖南大学 | The method for testing liquid Composite Permeability rate |
| CN106872333A (en) * | 2017-03-08 | 2017-06-20 | 西北工业大学 | The measuring method and measuring system of a kind of fabric face intrinsic permeability |
| CN112082919A (en) * | 2020-08-21 | 2020-12-15 | 西南交通大学 | Device for testing permeability of graded broken stone-high polymer grouting solidified body |
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Application publication date: 20160921 |