JPH07134085A - Tension impact tester - Google Patents

Tension impact tester

Info

Publication number
JPH07134085A
JPH07134085A JP30321793A JP30321793A JPH07134085A JP H07134085 A JPH07134085 A JP H07134085A JP 30321793 A JP30321793 A JP 30321793A JP 30321793 A JP30321793 A JP 30321793A JP H07134085 A JPH07134085 A JP H07134085A
Authority
JP
Japan
Prior art keywords
test piece
weight
cylinder pipe
grabber
measurement processing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP30321793A
Other languages
Japanese (ja)
Other versions
JP2500372B2 (en
Inventor
Yoshiaki Fujisawa
良昭 藤沢
Masanobu Taki
將展 瀧
Katsutoshi Matsusue
勝利 松末
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National Aerospace Laboratory of Japan
Original Assignee
National Aerospace Laboratory of Japan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National Aerospace Laboratory of Japan filed Critical National Aerospace Laboratory of Japan
Priority to JP5303217A priority Critical patent/JP2500372B2/en
Publication of JPH07134085A publication Critical patent/JPH07134085A/en
Application granted granted Critical
Publication of JP2500372B2 publication Critical patent/JP2500372B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To make possible the determination of strength characteristic of ceramics simply and quickly in the tensile impact destruction at a high temperature from the normal temperature using a test piece with a simple shape by arranging a grabber, a strain gauge, a hollow pipe, a weight, a data measurement processing/displaying device, a heating furnace and the like. CONSTITUTION:A weight 8 is set in a hollow cylinder pipe 7 hanging on a grabber 2 at a prescribed height and is made to fall with a manual type trigger. The weight 8 falls by a dead load and hits the bottom part of the cylinder pipe 7 at a fixed speed. The current impact power is transmitted to a wall surface of the cylinder pipe 7 to be propagated to a test piece 1. As the cylinder pipe 7 is not bound with respect to the rotation about a vertical axis no twisting load is applied on the test piece 1. The speed at the final end of the weight 8 is detected with an optical type sensor provided at a lower part of the cylinder pipe 7 to be sent to a data measurement processing/display device 9. Heat from a heating furnace 4 (controllable to 1,600 deg. from the normal temperatures is applied to the test piece 1. Data from the strain gauge 3 stuck on the grabber 2 are sent to the device 9 and undergoes a measurement processing.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、セラミックス材の引張
衝撃試験に最適の引張衝撃試験装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optimum tensile impact test device for a tensile impact test of ceramic materials.

【0002】一般に各種材料を実用に供するためには何
らかの衝撃強度データを揃える必要がある。従来よりシ
ャルピー衝撃試験のような曲げ強度に基づく衝撃強度評
価法が行われてきてたが、曲げ衝撃試験では寸法効果の
影響評価が困難であるため、同効果の評価が容易な純引
張による衝撃試験が必要とされている。ところで、引張
試験では供試体材の弾性係数が大きい場合、曲げやねじ
れの影響を受けやすい。特に高温引張試験においては、
供試体の変形ひずみの直接測定が困難なために、正確な
衝撃強度の評価が難しい。
Generally, in order to put various materials into practical use, it is necessary to prepare some kind of impact strength data. Conventionally, the impact strength evaluation method based on bending strength such as the Charpy impact test has been performed, but since it is difficult to evaluate the effect of the dimensional effect in the bending impact test, it is easy to evaluate the effect by pure tension. Testing is needed. By the way, in the tensile test, when the elastic modulus of the sample material is large, it is easily affected by bending and twisting. Especially in the high temperature tensile test,
Since it is difficult to directly measure the deformation strain of the specimen, it is difficult to accurately evaluate the impact strength.

【0003】このような引張試験のために使用される試
験機として、特開昭62−228133号公報は、互い
に反発する電磁力により試験片に負荷をかける手段と、
電磁力が負荷パターンに相応すべく電気信号を負荷手段
へ供給する負荷パターン設定手段とを有する引張試験機
を提案する。さらに、特開平4−65651号公報は、
重力落下する重錘をヨークに衝突させ、その際発生する
引張力を被試験片に加える試験機、並びに圧縮応力波を
被試験体内に通過させた後、被試験体の自由端面におい
て反射させた引張応力波により、被試験体内に引張衝撃
応力を作用させる試験機を開示する。
As a tester used for such a tensile test, Japanese Patent Laid-Open No. 62-228133 discloses means for applying a load to a test piece by electromagnetic forces repelling each other.
A tensile tester having a load pattern setting means for supplying an electric signal to the load means so that the electromagnetic force corresponds to the load pattern is proposed. Further, Japanese Patent Laid-Open No. 4-65651 discloses
A weight that falls by gravity collides with a yoke and a tensile force generated at that time is applied to the test piece, and a compressive stress wave is passed through the test object and then reflected on the free end surface of the test object. Disclosed is a testing machine that exerts a tensile impact stress in a device under test by a tensile stress wave.

【0004】従前から高温構造に適用可能な材料として
セラミックスは期待視されており、その一般的な熱的、
機械的特性に関する情報の必要性は高い。セラミックス
の強度特性は、3点曲げ静的強度については各方面で比
較的十分なデータの蓄積があり、基本的特性の相互比較
によって、材料開発におおいに貢献している。さらに、
破壊靱性試験も数多く行なわれてきており、セラミック
スの破壊強度が潜在欠陥の伝播開始条件に依存すると考
えられる現状では、強度評価のための一定の目安を与え
ている。
Ceramics have long been expected as a material applicable to high temperature structures, and their general thermal,
The need for information on mechanical properties is high. Regarding the strength characteristics of ceramics, there is relatively sufficient data accumulated in various fields regarding the three-point bending static strength, and the mutual comparison of basic characteristics greatly contributes to material development. further,
Many fracture toughness tests have been conducted, and in the present situation where the fracture strength of ceramics is considered to depend on the propagation initiation conditions of latent defects, it provides a certain standard for strength evaluation.

【0005】さて、セラミックスは硬脆材であり、衝撃
に対する強度特性を知ることは実用に供する上で大変重
要である。しかしながら高温衝撃特性に関しての研究報
告は、同種実験が困難であるためほとんど行なわれてお
らず、現状では動的強度の相対的評価を議論する段階に
さえ至っていない。前述した如き引張試験機は、セラミ
ックス材の高衝撃特性測定のための試験には不向きであ
る。
Ceramics are hard and brittle materials, and it is very important to know the strength characteristics against impact for practical use. However, research reports on high-temperature impact properties have hardly been carried out because similar experiments are difficult, and at present, it has not even reached the stage of discussing relative evaluation of dynamic strength. The tensile tester as described above is not suitable for the test for measuring the high impact characteristics of ceramic materials.

【0006】[0006]

【発明が解決しようとする課題】このため、本発明は、
単純形状の試験片が使用でき、かつ常温から高温(15
00℃以上)の温度範囲におけるセラミックスの引張衝
撃破壊時の強度特性を簡単に、迅速に求めることが可能
な引張衝撃試験装置を提供することを、解決すべき課題
とする。
Therefore, according to the present invention,
Simple shaped test pieces can be used, and they can be used at room temperature to high temperatures (15
It is an object to be solved to provide a tensile impact test device capable of easily and quickly obtaining strength characteristics at the time of tensile impact fracture of ceramics in a temperature range of 00 ° C or higher).

【0007】[0007]

【課題を解決するための手段】本発明は、前述した課題
を解決するために、セラミック製の試験片の両端に固定
されたつかみ具、各つかみ具に設けた歪ゲージ、試験片
を加熱する加熱炉、試験片を吊下するよう静止部材と上
側つかみ具とを結合させる自在継手、下側つかみ具に吊
下された中空管、中空管内を重力落下する錘、および歪
ゲージからの信号を少なくとも処理するデータ計測処
理、表示装置を有する引張衝撃試験装置を提案する。
In order to solve the above-mentioned problems, the present invention heats a gripping tool fixed to both ends of a ceramic test piece, a strain gauge provided on each gripping tool, and a test piece. Signals from a heating furnace, a universal joint that connects a stationary member and an upper grip to suspend a test piece, a hollow tube that is hung from the lower grip, a weight that falls by gravity in the hollow tube, and a strain gauge A tensile impact test device having a data measuring process and a display device for processing at least is proposed.

【0008】[0008]

【作用】本発明による引張衝撃装置は、重力による自然
落下を利用し錘を加速、底部に衝突した際の発生衝撃力
を試験片に引張衝撃荷重として負荷させ、この際の衝撃
力は中空管壁面を伝達し試験片に伝搬する。加熱炉から
の熱は試験片に加えられ、試験片をつかむつかみ具に貼
付した歪ゲージからのデータを計測処理する。
In the tensile impact device according to the present invention, gravity is used to accelerate the weight, and the impact force generated when the weight collides with the bottom is applied to the test piece as a tensile impact load. The impact force at this time is hollow. It propagates through the wall surface of the pipe and propagates to the test piece. The heat from the heating furnace is applied to the test piece, and the data from the strain gauge attached to the gripping tool that grips the test piece is measured and processed.

【0009】[0009]

【実施例】試験片1は断面円形状にして中央を細くした
外周面テーパ状のもので、上下のつかみ具2、2の側面
に設けたテーパ状スリットを介して、つかみ具2、2の
中央孔に嵌合され、保持される。つかみ具2、2の細径
部に歪ゲージ3、3を貼付する。歪ゲージ3、3からの
信号はデータ計測処理、表示装置9に送られる。試験片
1の上部をつかむつかみ具2は自在継手6を介して静止
部材5に支持される。 試験片1の下部をつかむつかみ
具2は、中空円筒管7の上方開口部に固定される。中空
円筒管7内に重錘8を配する。重錘8は手動式トリガー
により中空円筒管7の底へ落下可能とさせる。重錘8の
落下速度をフォトセンサー10により検知し、この信号
をデータ計測処理、表示装置9に送る。
EXAMPLE A test piece 1 has a tapered outer peripheral surface with a circular cross section and a narrow center, and the grips 2, 2 are inserted through tapered slits provided on the side surfaces of the upper and lower grips 2, 2. It is fitted and retained in the central hole. The strain gauges 3 and 3 are attached to the small diameter portions of the grips 2 and 2. The signals from the strain gauges 3 and 3 are sent to the data measurement processing and display device 9. The grip 2 for gripping the upper portion of the test piece 1 is supported by the stationary member 5 via the universal joint 6. The grip 2 for gripping the lower part of the test piece 1 is fixed to the upper opening of the hollow cylindrical tube 7. A weight 8 is arranged in the hollow cylindrical tube 7. The weight 8 can be dropped to the bottom of the hollow cylindrical tube 7 by a manual trigger. The falling speed of the weight 8 is detected by the photo sensor 10, and this signal is sent to the data measurement processing and display device 9.

【0010】本発明による引張衝撃試験装置のより詳細
な構成を述べる。つかみ具2に吊下した中空円筒管7
(S45C製)の中に錘8を規定高さに固定治具により
セット、手動式トリガーにより落下せしめると、錘8は
重力落下し管7の底部に一定速度にて衝突する(速度偏
差は2%以下)。この際の衝撃力は中空管7の壁面を伝
わり最終的に試験片1に伝搬する。中空管7は鉛直軸回
りの回転に対し無拘束であるため、試験片1には原理的
に捩れ荷重は加わることはない。錘8の終端速度は、中
空管7の下部に設けられた光学式センサー10により検
出される。センサー10は2組の発光ダイオード・フォ
トセンサー系により構成され、2条の平行光間における
錘の横断時間差により直接、速度を算出する。
A more detailed structure of the tensile impact test device according to the present invention will be described. Hollow cylindrical tube 7 suspended from the grip 2
When the weight 8 is set in the (made by S45C) to a specified height by a fixing jig and dropped by a manual trigger, the weight 8 falls by gravity and collides with the bottom of the pipe 7 at a constant speed (speed deviation is 2 %Less than). The impact force at this time propagates along the wall surface of the hollow tube 7 and finally propagates to the test piece 1. Since the hollow tube 7 is unrestrained against rotation about the vertical axis, no torsional load is applied to the test piece 1 in principle. The terminal speed of the weight 8 is detected by an optical sensor 10 provided below the hollow tube 7. The sensor 10 is composed of two sets of light emitting diode / photo sensor systems, and directly calculates the velocity from the difference in the crossing time of the weight between two parallel rays.

【0011】また、高温試験においては、試験片1に加
わる荷重は直接計測できないため、下部および上部のつ
かみ具2、2(いずれも黄銅製)近傍に設けられた亜鈴
状荷重計測部(S45C製、断面は真円形)で各々の衝
撃力(歪み値を動歪計−ディジタル式の計測器にて取
得、計測点での軸方向の縦剛性から荷重値に変換)を計
測することにより、試験片破断に伴う衝撃パラメータを
求める。各つかみ具2、2は自在継手6を介し曲げ荷重
を回避するとともに、荷重計測部では軸に対する曲げの
影響を考慮し金属箔式歪ゲージ3、3(1軸式、ゲージ
長2mm、120Ω)を円周上に120°毎に貼付、この
3点の測定値の相互差から曲げ荷重の有無とその方向を
確認して測定値の信頼性維持を図る。
In the high temperature test, since the load applied to the test piece 1 cannot be directly measured, a dumbbell-shaped load measuring section (made of S45C) provided near the lower and upper grips 2 and 2 (both made of brass) is used. , The cross-section is a perfect circle, and each impact force (the strain value is obtained by a dynamic strain gauge-digital measuring instrument, and the axial vertical rigidity at the measurement point is converted to the load value) is tested. Determine the impact parameters associated with one-sided fracture. The grips 2 and 2 avoid bending load through the universal joint 6, and the load measuring unit considers the influence of bending on the shaft, and the metal foil type strain gauges 3 and 3 (1 axis type, gauge length 2 mm, 120 Ω). Is stuck on the circumference every 120 °, and the presence or absence of bending load and its direction are confirmed from the mutual difference of the measured values at these three points to maintain the reliability of the measured values.

【0012】試験片の加熱は出力4kVA の交流4灯式赤
外線反射式イメージ炉4を用い、常温より1600℃ま
での制御を行なう。試験片1の表面には、赤外線吸収率
を高めるとともに一様に加熱するため赤外線吸収塗料
(Pyromark 2500)を噴霧塗装後、低温で熱処理を行な
う。なお、試験片温度はJIS−R型熱電対によりモニ
ターし、加熱平衡温度にて試験を行なう。
The heating of the test piece is performed by controlling the temperature from room temperature to 1600 ° C. by using an AC four-lamp infrared reflection type image furnace 4 having an output of 4 kVA. The surface of the test piece 1 is spray-coated with an infrared absorbing paint (Pyromark 2500) in order to increase the infrared absorption rate and to uniformly heat the surface, and then heat treatment is performed at a low temperature. The temperature of the test piece is monitored by a JIS-R type thermocouple, and the test is performed at the heating equilibrium temperature.

【0013】[0013]

【効果】本発明の装置は、試験片破断に至るまで著しい
曲げ荷重を試験片に発生させることはなく、引張衝撃試
験装置として有効である。
The apparatus of the present invention does not generate a significant bending load on the test piece until the test piece breaks, and is effective as a tensile impact test apparatus.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による引張衝撃試験装置の一例の断面図
である。
FIG. 1 is a sectional view of an example of a tensile impact test device according to the present invention.

【符号の説明】[Explanation of symbols]

1 試験片 2 つかみ具 3 歪ゲージ 4 加熱炉 6 継手 7 中空円筒管 9 データ計測処理、表示装置 1 Test piece 2 Grasping tool 3 Strain gauge 4 Heating furnace 6 Joint 7 Hollow cylindrical tube 9 Data measurement processing, display device

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 セラミック製の試験片の両端に固定され
たつかみ具、各つかみ具に設けた歪ゲージ、 試験片を加熱する加熱炉、 試験片を吊下するよう静止部材と上側つかみ具とを結合
させる自在継手、 下側つかみ具に吊下された中空管、 中空管内を重力落下する錘、および歪ゲージからの信号
を少なくとも処理するデータ計測処理、表示装置を有す
る引張衝撃試験装置。
1. A grasping tool fixed to both ends of a ceramic test piece, a strain gauge provided on each grasping tool, a heating furnace for heating the test piece, a stationary member and an upper grasping tool for suspending the test piece. A tensile impact test device that has a universal joint for connecting the above, a hollow tube suspended by a lower grip, a weight that falls by gravity in the hollow tube, and a data measurement process that processes at least the signal from the strain gauge, and a display device.
JP5303217A 1993-11-10 1993-11-10 Tensile impact test equipment Expired - Lifetime JP2500372B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5303217A JP2500372B2 (en) 1993-11-10 1993-11-10 Tensile impact test equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5303217A JP2500372B2 (en) 1993-11-10 1993-11-10 Tensile impact test equipment

Publications (2)

Publication Number Publication Date
JPH07134085A true JPH07134085A (en) 1995-05-23
JP2500372B2 JP2500372B2 (en) 1996-05-29

Family

ID=17918292

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5303217A Expired - Lifetime JP2500372B2 (en) 1993-11-10 1993-11-10 Tensile impact test equipment

Country Status (1)

Country Link
JP (1) JP2500372B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104181102A (en) * 2014-08-08 2014-12-03 太原理工大学 Experimental device and experimental method of impact drawing-twisting load
JP2015014596A (en) * 2013-06-08 2015-01-22 株式会社山本金属製作所 Cantilever type rotary-bending fatigue testing apparatus under high temperature environment
CN112729672A (en) * 2020-12-17 2021-04-30 南京航空航天大学 Ground calibration device of aerial towing cable system and working method thereof
CN113155632A (en) * 2021-04-07 2021-07-23 刘秋平 Detection system and detection process for safety belt hanger in electric power construction
CN114354040A (en) * 2021-12-06 2022-04-15 河北燕兴机械有限公司 Testing device for firing energy of firing mechanism

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US5691320A (en) 1987-10-28 1997-11-25 Pro-Neuron, Inc. Acylated pyrimidine nucleosides for treatment of systemic inflammation and inflammatory hepatitis
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542031A (en) * 1978-09-21 1980-03-25 Babcock Hitachi Kk Impact tension testing machine
JPH0465651A (en) * 1990-07-05 1992-03-02 Kobe Steel Ltd Impact tension testing machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5542031A (en) * 1978-09-21 1980-03-25 Babcock Hitachi Kk Impact tension testing machine
JPH0465651A (en) * 1990-07-05 1992-03-02 Kobe Steel Ltd Impact tension testing machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015014596A (en) * 2013-06-08 2015-01-22 株式会社山本金属製作所 Cantilever type rotary-bending fatigue testing apparatus under high temperature environment
CN104181102A (en) * 2014-08-08 2014-12-03 太原理工大学 Experimental device and experimental method of impact drawing-twisting load
CN112729672A (en) * 2020-12-17 2021-04-30 南京航空航天大学 Ground calibration device of aerial towing cable system and working method thereof
CN113155632A (en) * 2021-04-07 2021-07-23 刘秋平 Detection system and detection process for safety belt hanger in electric power construction
CN113155632B (en) * 2021-04-07 2022-09-30 华电四川发电有限公司攀枝花西区分公司 Detection system and detection process for safety belt hanger in electric power construction
CN114354040A (en) * 2021-12-06 2022-04-15 河北燕兴机械有限公司 Testing device for firing energy of firing mechanism

Also Published As

Publication number Publication date
JP2500372B2 (en) 1996-05-29

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