JP2500372B2 - Tensile impact test equipment - Google Patents
Tensile impact test equipmentInfo
- Publication number
- JP2500372B2 JP2500372B2 JP5303217A JP30321793A JP2500372B2 JP 2500372 B2 JP2500372 B2 JP 2500372B2 JP 5303217 A JP5303217 A JP 5303217A JP 30321793 A JP30321793 A JP 30321793A JP 2500372 B2 JP2500372 B2 JP 2500372B2
- Authority
- JP
- Japan
- Prior art keywords
- test piece
- grip
- test
- impact
- tensile
- 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.)
- Expired - Lifetime
Links
Description
【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
された上下つかみ具、各つかみ具の細径部に設けた歪ゲ
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
つかみ具をその上部開口に固定し、かつ下側つかみ具の
みに鉛直軸まわりのねじれ力を発生しないよう吊下され
た有底の中空管、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 provides an upper and lower grips fixed to both ends of a ceramic test piece, a strain gauge provided in a small diameter portion of each grip, A heating furnace that heats the test piece, a universal joint that connects the stationary member and the upper grip to suspend the test piece, the lower grip is fixed to the upper opening, and only the lower grip has a vertical axis. Proposal of a tensile impact test device with a bottomed hollow tube suspended so that it does not generate twisting force, a weight that drops in the hollow tube by gravity, and a data measurement process that processes at least signals from strain gauges, and a display device To do.
【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, 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 type measuring instrument, and the vertical rigidity in the axial direction at the measurement point is converted to the load value) 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 attached 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.
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)
た上下つかみ具、各つかみ具の細径部に設けた歪ゲー
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、 下側つかみ具をその上部開口に固定し、かつ下側つかみ
具のみに鉛直軸まわりのねじれ力を発生しないよう吊下
された有底の中空管、 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 top and bottom grips fixed to both ends of a ceramic test piece, a strain gauge provided in a small diameter portion of each grip, a heating furnace for heating the test piece, and a stationary member for suspending the test piece. Universal joint that connects the upper grip to the upper grip, the lower grip is fixed to the upper opening, and the lower grip
It has a hollow tube with a bottom suspended so as not to generate a twisting force around the vertical axis only on the tool, a weight that falls by gravity inside the hollow tube, and a data measurement processing and display device that processes at least the signal from the strain gauge Tensile impact test equipment.
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 JPH07134085A (en) | 1995-05-23 |
| JP2500372B2 true 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3510548B2 (en) | 1999-12-14 | 2004-03-29 | 株式会社米倉製作所 | Stress application observation device |
| US7173017B1 (en) | 1987-10-28 | 2007-02-06 | Wellstat Therapeutics Corporation | Pyrimidine nucleotide precursors for treatment of systemic inflammation and inflammatory hepatitis |
| US7709459B2 (en) | 1994-07-01 | 2010-05-04 | Wellstat Therapeutics Corporation | Pyrimidine nucleotide precursors for treatment of systemic inflammation and inflammatory hepatitis |
| US7863254B2 (en) | 2000-03-16 | 2011-01-04 | The Mclean Hospital Corporation | Compounds for the treatment of psychiatric or substance abuse disorders |
| US7947661B2 (en) | 2004-08-11 | 2011-05-24 | The Mclean Hospital Corporation | Compounds for the treatment of marihuana dependence, withdrawal, and usage |
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| 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 |
| CN104181102B (en) * | 2014-08-08 | 2016-04-20 | 太原理工大学 | A kind of experimental provision and experimental technique impacting tension-torsion loading |
| CN112729672B (en) * | 2020-12-17 | 2021-10-22 | 南京航空航天大学 | Ground calibration device of aerial towing cable system and working method thereof |
| CN114965082A (en) * | 2021-04-07 | 2022-08-30 | 刘秋平 | Electric power construction safety detection process |
| 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 |
Family Cites Families (2)
| 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 |
-
1993
- 1993-11-10 JP JP5303217A patent/JP2500372B2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7173017B1 (en) | 1987-10-28 | 2007-02-06 | Wellstat Therapeutics Corporation | Pyrimidine nucleotide precursors for treatment of systemic inflammation and inflammatory hepatitis |
| US7709459B2 (en) | 1994-07-01 | 2010-05-04 | Wellstat Therapeutics Corporation | Pyrimidine nucleotide precursors for treatment of systemic inflammation and inflammatory hepatitis |
| JP3510548B2 (en) | 1999-12-14 | 2004-03-29 | 株式会社米倉製作所 | Stress application observation device |
| US7863254B2 (en) | 2000-03-16 | 2011-01-04 | The Mclean Hospital Corporation | Compounds for the treatment of psychiatric or substance abuse disorders |
| US8030294B2 (en) | 2000-03-16 | 2011-10-04 | The Mclean Hospital Corporation | Compounds for the treatment of psychiatric or substance abuse disorders |
| US7947661B2 (en) | 2004-08-11 | 2011-05-24 | The Mclean Hospital Corporation | Compounds for the treatment of marihuana dependence, withdrawal, and usage |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07134085A (en) | 1995-05-23 |
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