KR101661474B1 - Series mounted multi specimen loading device with shock absorbing system - Google Patents

Series mounted multi specimen loading device with shock absorbing system Download PDF

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Publication number
KR101661474B1
KR101661474B1 KR1020150073138A KR20150073138A KR101661474B1 KR 101661474 B1 KR101661474 B1 KR 101661474B1 KR 1020150073138 A KR1020150073138 A KR 1020150073138A KR 20150073138 A KR20150073138 A KR 20150073138A KR 101661474 B1 KR101661474 B1 KR 101661474B1
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KR
South Korea
Prior art keywords
jig
test
shock absorbing
present
loading device
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KR1020150073138A
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Korean (ko)
Inventor
윤은섭
신인환
원세열
김홍덕
Original Assignee
한국수력원자력 주식회사
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Priority to KR1020150073138A priority Critical patent/KR101661474B1/en
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Publication of KR101661474B1 publication Critical patent/KR101661474B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G01N3/04—Chucks
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0017—Tensile
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/006—Crack, flaws, fracture or rupture
    • G01N2203/0062—Crack or flaws
    • G01N2203/0064—Initiation of crack
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0266—Cylindrical specimens
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/04—Chucks, fixtures, jaws, holders or anvils
    • G01N2203/0441—Chucks, fixtures, jaws, holders or anvils with dampers or shock absorbing means

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  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

The present invention relates to a serial loading device of a plurality of specimens on which a shock absorbing system is mounted, wherein the shock absorbing system is one of the systems to perform various studies so as to comprehend crack initiation characteristics. The serial loading device comprises a jig having a pair of plate-shaped bodies which are provided in parallel with specimens, and a web vertically and integrally connecting the bodies. Moreover, at least two jigs are serially connected by a coupling tool in an axial direction of the specimens for a length thereof to be changed in a longitudinal direction.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for loading a plurality of test pieces having a shock absorbing device,

The present invention relates to a tandem load device for a plurality of test pieces equipped with a shock absorber, which is one of devices for carrying out various studies for grasping crack initiation characteristics.

The crack initiation properties such as stress corrosion cracks are very important for evaluating the integrity of the equipment and various studies are being conducted to grasp crack initiation characteristics.

Experiments with the same material and environment have shown that there are many variations in the results. Because it takes more than several months to carry out the experiments, many test pieces are being mounted at the same time.

In the case of an apparatus which performs a crack initiation characteristic test by continuously applying a constant stress, test pieces are mounted in parallel or in series. In this case, it is possible to mount a plurality of test specimens at the same time, but in the case of a crack and fracture of one specimen in parallel, stress is excessively applied to the specimen in which no crack occurs in the case of the parallel method, And the test was interrupted.

As a conventional technique for solving such a problem, there has been proposed a tandem type load attaching device of a plurality of test pieces equipped with a shock absorbing device for preventing a test piece from being suddenly judged by attaching a test piece to a jig.

For example, in Japanese Laid-Open Patent Publication No. 2012-0121803 (Registration Date: 2013.05.20.), A width of an alignment axis formed in a thin plate shape and a parallel portion of a tensile specimen is measured at a plurality of positions on the side of a parallel portion, In order to be able to sort.

Published Patent Publication No. 2012-0121803 (Registration date: May 20, 2013)

The present invention intends to provide a tandem load device for a plurality of test pieces equipped with an impact damping device improved in durability by improving the tensile tester of the prior art.

In order to accomplish the above object, a tandem type load attaching device for a plurality of test pieces equipped with a shock absorber according to the present invention comprises a pair of plate bodies arranged in parallel with a test piece, A jig having a web,

At least two or more jigs may be connected in series by an engaging jig in the axial direction of the test piece to change the length in the longitudinal direction.

Preferably, in the present invention, the coupling jig is a fixing pin inserted into a slot of a slot formed in the longitudinal direction of each body of the adjacent jig to connect the two jigs.

Preferably, in the present invention, an elastic body is further provided on one end surface of the engaging jig.

Preferably, in the present invention, a piece of jig is provided such that a part of the jig is superimposed.

Preferably, in the present invention, a male jig is connected to the above-mentioned paper jig.

Preferably, the present invention further includes a fixing pin for fixing the male and female jigs which are overlapped and connected to each other.

The tandem load device of a plurality of test specimens equipped with the shock absorber according to the present invention can perform a crack test in which a plurality of test specimens are simultaneously mounted and perform continuous testing without interruption even if the test specimen is broken during the test And can contribute to efficient test execution.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view of a jig of a tandem load device of a plurality of test pieces equipped with a shock absorber according to the present invention,
FIG. 2 is an operation diagram of a tandem type loader of a plurality of test pieces equipped with the shock absorber according to the present invention,
3 is a partially enlarged view of A in Fig.

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Meanwhile, in the present invention, the terms first and / or second etc. may be used to describe various components, but the components are not limited to the terms. The terms may be referred to as a second element only for the purpose of distinguishing one element from another, for example, to the extent that it does not depart from the scope of the invention in accordance with the concept of the present invention, Similarly, the second component may also be referred to as the first component.

Whenever an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but it should be understood that other elements may be present in between something to do. On the other hand, when it is mentioned that an element is "directly connected" or "directly contacted" to another element, it should be understood that there are no other elements in between. Other expressions for describing the relationship between components, such as "between" and "between" or "adjacent to" and "directly adjacent to" should also be interpreted.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It will be further understood that the terms " comprises ", or "having ", and the like in the specification are intended to specify the presence of stated features, integers, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a view of a jig of a tandem load device of a plurality of test pieces equipped with a shock absorber according to the present invention. The jig of the tandem type load attaching device includes a pair of plate-like main bodies 11, And a web (12) to which the web (12) is attached.

And a test piece 20 parallel to the main body 11 and vertically positioned on one end surface of the web 12. At least two coupling jigs 13 are fixed to the main body 11 in one main body 11, And a slot of a slot formed in the longitudinal direction of the slot.

Referring to FIG. 2, an experiment is carried out to grasp crack initiation characteristics such as stress corrosion cracks in an operation diagram of a tandem type load attaching device of a plurality of test pieces equipped with the shock absorber according to the present invention.

In the jig 10, the rock paper 15 and the male jig 16 are partially overlapped with each other. In the overlapped portion, a fixing jig 13 having a rectangular shape is provided to insert the fixing pin 30, The test piece 20 provided on the base 10 can be freely tensioned by a tensile load.

The shape of the engaging jig 13 and the fixing pin 30 does not necessarily have to be a quadrangular shape but may be a circular shape or another shape if it can sufficiently perform its role in its original function .

The test piece 20 is connected in series to the jig 10 in order to perform the crack initiation characteristic test so that the test piece 20 is axially tensioned and when the jig 10 is pulled over a specific length, do.

On the other hand, when cracks and fractures occur in the test piece 20 during the experiment, the fixing pin 30 keeps the rocking jig 15 and the male jig 16 from moving further, can do.

Referring to FIG. 3, in a partial enlargement of A in FIG. 2 according to the present invention, a fixing pin 30 is attached to an engaging jig 13 located at an overlapped portion of adjacent jig 10, And the male jig 16 is connected.

The size of the jig 13 of each of the rock paper 15 and the male jig 16 is determined according to the tensile properties of the test piece 20. When the test piece 20 is broken during the test, The pin 30 and the male jig 16 are fixed and a constant load can be continuously applied to the other test piece 20 in which cracking and fracture have not occurred.

Strength elastic body 14 for relieving collision between the fixing pin 30 and the jig 10 due to sudden movement when the test piece 20 is suddenly broken and transmitting the impact load to the other test piece 20, Is attached to the jig (13) of the jig (10) by a spring.

It is not always necessary to connect the pad 15 and the male jig 16 in the order of the pad 15 and the male 16 so that they can be connected in the reverse order, have.

In addition, not only the spring but also various other elastic bodies 14 may be used as the elastic body 14 for mitigating the impact, and any equipment for relieving the impact may be used.

It is possible to perform a crack test by simultaneously mounting a plurality of test pieces 20 on the jig 10 by this connection method and to perform a continuous test without interruption even if the test piece 20 is broken during the test.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

10: Jig 11: Body
12: web 13: engagement jig
14: Elastomer 15:
16: male jig 20: test piece
30: Fixing pin

Claims (6)

And a jig having a body made of a pair of plates arranged side by side with the test piece and a web vertically and integrally connecting the pair of bodies,
Wherein at least two adjacent jigs are connected in series by a coupling jig formed in the axial direction of the test piece and the length of the jig is changed in the longitudinal direction by inserting the jig into the coupling jig and connecting the two jigs to the fixing pin A tandem load application device of a plurality of test specimens with shock absorbers. delete The apparatus according to claim 1, further comprising an elastic body on one end surface of the coupling jig. The apparatus according to claim 1, wherein the jig is provided such that a part of the jig is superposed on the jig. 5. The apparatus of claim 4, wherein the shock absorbing device is characterized by a male jig to be connected thereto. 6. The apparatus according to claim 5, further comprising a fixing pin for fixing the jig and the male jig to each other.
KR1020150073138A 2015-05-26 2015-05-26 Series mounted multi specimen loading device with shock absorbing system KR101661474B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113447367A (en) * 2021-06-21 2021-09-28 广东省科学院工业分析检测中心 Device for detecting creep property of heat insulation section bar and detection method thereof
CN115096700A (en) * 2022-06-15 2022-09-23 中国原子能科学研究院 Tensile sample series connection clamp, test device and test method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62233739A (en) * 1986-04-03 1987-10-14 Fuji Electric Co Ltd Test-piece for multistage creep deterioration treatment
KR20110075324A (en) * 2009-12-28 2011-07-06 재단법인 포항산업과학연구원 Seawater erosion fatigue testor
KR101148081B1 (en) * 2009-12-29 2012-05-22 삼성중공업 주식회사 Wire rope deformation measuring jig and method
KR20120121803A (en) 2011-04-27 2012-11-06 현대제철 주식회사 Jig for aligning tension sample and tension test apparatus having the same
KR20140128144A (en) * 2013-04-26 2014-11-05 성균관대학교산학협력단 Buckling restrained jig for compression test using tensile tester

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62233739A (en) * 1986-04-03 1987-10-14 Fuji Electric Co Ltd Test-piece for multistage creep deterioration treatment
KR20110075324A (en) * 2009-12-28 2011-07-06 재단법인 포항산업과학연구원 Seawater erosion fatigue testor
KR101148081B1 (en) * 2009-12-29 2012-05-22 삼성중공업 주식회사 Wire rope deformation measuring jig and method
KR20120121803A (en) 2011-04-27 2012-11-06 현대제철 주식회사 Jig for aligning tension sample and tension test apparatus having the same
KR20140128144A (en) * 2013-04-26 2014-11-05 성균관대학교산학협력단 Buckling restrained jig for compression test using tensile tester

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113447367A (en) * 2021-06-21 2021-09-28 广东省科学院工业分析检测中心 Device for detecting creep property of heat insulation section bar and detection method thereof
CN115096700A (en) * 2022-06-15 2022-09-23 中国原子能科学研究院 Tensile sample series connection clamp, test device and test method

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