JPS62187237A - Tension testing device for brittle material - Google Patents
Tension testing device for brittle materialInfo
- Publication number
- JPS62187237A JPS62187237A JP2877886A JP2877886A JPS62187237A JP S62187237 A JPS62187237 A JP S62187237A JP 2877886 A JP2877886 A JP 2877886A JP 2877886 A JP2877886 A JP 2877886A JP S62187237 A JPS62187237 A JP S62187237A
- Authority
- JP
- Japan
- Prior art keywords
- bending
- load
- load cell
- testing device
- bending moment
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 19
- 238000012360 testing method Methods 0.000 title claims abstract description 14
- 238000005452 bending Methods 0.000 claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 7
- 238000009864 tensile test Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の目的１
（産業上の利用分野）
本発明はセラミックス等の脆性材料の引張試験装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention 1 (Field of Industrial Application) The present invention relates to a tensile testing device for brittle materials such as ceramics.
（従来の技術）
セラミックス等の脆性材料の機械的特性のうち、最も基
本的な引張強度特性を測定する場合、延性に優れた金Ｂ
材料の引張強度特性と比べて、引張治具と試験片の軸合
せが充分でないと試験片に曲げモーメントが作用し、純
粋な引張強度が測定できないことがあげられる。一般に
金属の場合には引張試験中に曲げモーメントが作用して
も、塑性変形により応力が再分配されるからその影響が
比較的に少ないが、脆性材料の場合にはほとんど塑性を
伴なわないで破壊するため、引張強度を測定する上で曲
げモーメントの影響が非常に大きい。(Prior art) When measuring the most basic tensile strength properties among the mechanical properties of brittle materials such as ceramics, gold B, which has excellent ductility, is used.
Compared to the tensile strength characteristics of the material, if the alignment of the tensile jig and test piece is not sufficient, a bending moment will act on the test piece, making it impossible to measure pure tensile strength. In general, even if a bending moment is applied to metals during a tensile test, the effect is relatively small because the stress is redistributed through plastic deformation, but in the case of brittle materials, there is almost no plasticity. Because it breaks, bending moment has a very large effect on measuring tensile strength.
従来、引張試験中の曲げモーメントを取り除く為に様々
な工夫がなされている。例えば特開昭５５−１１３９８
５号公報に示されるように試験片とそれをつかむ治具の
間に延性材の棒状体を挿入し、引張試験中に棒状体が塑
性変形することにより曲げモーメントを吸収するものや
、あるいは引張ロッドにユニバーサル・ジヨイントを設
けることが行なわれていた。Conventionally, various efforts have been made to remove the bending moment during a tensile test. For example, JP-A-55-11398
As shown in Publication No. 5, a rod-shaped body made of ductile material is inserted between the test piece and a jig that grips it, and the rod-shaped body is plastically deformed during the tensile test to absorb the bending moment. It was common practice to provide a universal joint on the rod.
（発明が解決しようとする問題点）
しかし、上記の方法でも曲げモーメントの値をゼロにす
る事は出来ず、軸力１０％程度の曲げモーメントが残留
していた。以上の様に正確な引張強度特性を知るために
は、曲げモーメントをゼロにする必要があり、このため
の試験装置が望まれている。(Problems to be Solved by the Invention) However, even with the above method, the value of the bending moment could not be reduced to zero, and a bending moment of about 10% of the axial force remained. As described above, in order to obtain accurate tensile strength characteristics, it is necessary to reduce the bending moment to zero, and a testing device for this purpose is desired.
本発明の目的は、引張試験中の曲げモーメントをゼロに
する脆性材料の引張試験装置を提供することにおる。An object of the present invention is to provide a tensile testing device for brittle materials that reduces the bending moment to zero during a tensile test.
［発明の構成］
（問題点を解決するための手段と作用）本発明による脆
性材料の引張試験装置は、セラミックスなどの脆性材料
の引張試験装置において、引張力を負荷するロッド部に
曲げ検出ロードセルを装着し、さらにこの検出ロードセ
ルの曲げ荷重がゼロになるように引張試験装置の荷重負
荷軸を動かす移動機構を設けたことを特徴とし、その検
出ロードセルの信号による曲げモーメント値がゼロにな
るようにクロスヘッドと荷重負荷軸の取付部を負荷荷重
と直角方向の２軸に移動制御させるものでおる。[Structure of the Invention] (Means and Effects for Solving the Problems) A tensile testing device for brittle materials according to the present invention is a tensile testing device for brittle materials such as ceramics, in which a bending detection load cell is installed in a rod portion that loads a tensile force. and a moving mechanism that moves the load bearing axis of the tensile testing device so that the bending load of the detection load cell becomes zero, and the bending moment value due to the signal of the detection load cell becomes zero. The crosshead and the load-bearing shaft mounting portion are controlled to move in two axes perpendicular to the load.
（実施例）
以下、本発明を図面に示す実施例を参照して詳細に説明
する。図面において、セラミックス等の脆性材料引張試
験片１の両端は、試験片チＶツク部２．２′を用いて固
定させている。このチャック部２，２′はロッド３，４
に接続している。ロッド３とフレーム５との間に引張力
測定用の軸力検出ロードセル６を設置している。(Examples) Hereinafter, the present invention will be described in detail with reference to examples shown in the drawings. In the drawing, both ends of a tensile test piece 1 made of a brittle material such as ceramics are fixed using test piece chucks 2.2'. These chuck parts 2, 2' are connected to rods 3, 4
is connected to. An axial force detection load cell 6 for measuring tensile force is installed between the rod 3 and the frame 5.
ざらにロッド３の途中には曲げ検出ロードセル７が取り
付けられている。このロードセル７の出力は、アンプ８
を介してサーボ制御器９に入り、クロスヘッド１０上に
取り付けられている可動台１１を駆動するサーボモータ
１２ａ 、 １２ｔｌに制御信号として入力する。クロ
スヘッド１０はネジ１３を図示しない駆動機構で回転さ
せることにより下降して脆性材料引張試験片１を一定速
度で引張る様に構成されている。Roughly in the middle of the rod 3, a bending detection load cell 7 is attached. The output of this load cell 7 is the amplifier 8
The signal enters the servo controller 9 via the servo controller 9 and is input as a control signal to the servo motors 12a and 12tl that drive the movable base 11 mounted on the crosshead 10. The crosshead 10 is configured to be lowered by rotating a screw 13 by a drive mechanism (not shown) and to pull the brittle material tensile test piece 1 at a constant speed.
次に本発明による脆性材料の引張試験装置の作用につい
て説明する。ネジ１３．１３で引張荷重を増加させるに
従い、曲げ検出ロードセル７には曲げ荷重が作用する。Next, the operation of the tensile testing apparatus for brittle materials according to the present invention will be explained. As the tensile load is increased with the screws 13.13, the bending load acts on the bending detection load cell 7.
このとき、ロードセル７から曲げモーメントに比例した
信号が出力される。曲げモーメントは引張軸の直角２方
向に分割することができるため、曲げ検出ロードセル７
の出力信号も２本で構成される。曲げ検出ロードセル７
からの信号は、アンプ８により増幅されて、サーボ制御
器９に入る。可動台１１は曲げモーメント検出ロードセ
ル７と同様の引張軸の直角２方向に２個のサーボモータ
１２ａ 、 １２ｂ ＠設置して動く様になっている。At this time, the load cell 7 outputs a signal proportional to the bending moment. Since the bending moment can be divided into two directions perpendicular to the tension axis, the bending detection load cell 7
The output signal is also composed of two lines. Bending detection load cell 7
The signal from the servo controller 9 is amplified by an amplifier 8 and input to a servo controller 9. The movable table 11 is moved by two servo motors 12a and 12b installed in two directions perpendicular to the tension axis, similar to the bending moment detection load cell 7.
サーボ制御器９では曲げ検出ロードセル７からの信号が
ゼロになる様に２個のサーボモータ１２ａ 、 １２ｂ
を個別に制御する。The servo controller 9 operates two servo motors 12a and 12b so that the signal from the bending detection load cell 7 becomes zero.
individually controlled.
この様に曲げ検出ロードセル７の曲げモーメントをサー
ボ機構を用いてゼロにする事ができるため、試験片１に
発生する曲げモーメントを実質的に無くす事ができ、従
来に比べて試験機の軸心精度が悪い場合でも高精度の引
張試験を行うことができる。In this way, since the bending moment of the bending detection load cell 7 can be reduced to zero using the servo mechanism, the bending moment generated in the test piece 1 can be virtually eliminated, and the axis of the testing machine can be Highly accurate tensile tests can be performed even if the accuracy is poor.
以上の図面に示す実施例では、可動台１１がクロスヘッ
ド１０上の荷重軸と直角２方向に動く様になっていたが
、可動台１１の傾きを制御する事によっても曲げモーメ
ントを制御することが可能である。In the embodiment shown in the drawings above, the movable base 11 moves in two directions perpendicular to the load axis on the crosshead 10, but the bending moment can also be controlled by controlling the inclination of the movable base 11. is possible.
［発明の効果］
以上のように本発明によれば、従来の引張試験装置に比
べて試験片にかかる曲げモーメントを実質的にゼロにす
る事ができるため、セラミックス等の脆性材料の引張特
性を高精度で求める事ができ、ざらに従来曲げモーメン
トを減少するために試験に多大の労力を必要としたもの
が不要となり、実験能率が格段に向上する。[Effects of the Invention] As described above, according to the present invention, the bending moment applied to the test piece can be reduced to substantially zero compared to conventional tensile test equipment, so the tensile properties of brittle materials such as ceramics can be improved. It can be determined with high precision, and the test that conventionally required a great deal of effort to roughly reduce the bending moment is no longer necessary, greatly improving experimental efficiency.
図面は本発明による脆性材料の引張試験装置の一実施例
を示す構成図である。
１・・・脆性材料引張試験片
２・・・試験片チャック部
３．４・・・ロッド
５・・・フレーム
６・・・動力検出口−ドセル
７・・・曲げ検出ロードセル
８・・・アンプ
９・・・サーボ制御器
１０・・・クロスヘッド
１１・・・可動台
１２・・・サーボモータ
１３・・・ネジ棒
代理人 弁理士 則 近 憲 佑
同 三俣弘文The drawing is a configuration diagram showing an embodiment of a tensile testing apparatus for brittle materials according to the present invention. 1... Brittle material tensile test piece 2... Test piece chuck part 3.4... Rod 5... Frame 6... Power detection port - Docell 7... Bending detection load cell 8... Amplifier 9...Servo controller 10...Crosshead 11...Movable base 12...Servo motor 13...Threaded rod agent Patent attorney Noriyuki Noriyuki Yudo Hirofumi Mitsumata
Claims (2)
いて、引張力を負荷するロッド部に曲げ検出ロードセル
を装着し、さらにこの検出ロードセルの曲げ荷重がゼロ
になるように引張試験装置の荷重負荷軸を動かす移動機
構を設けたことを特徴とする脆性材料の引張試験装置。(1) In a tensile testing device for brittle materials such as ceramics, a bending detection load cell is attached to the rod section that applies tensile force, and the load axis of the tensile testing device is adjusted so that the bending load of this detection load cell becomes zero. A tensile testing device for brittle materials, characterized by being equipped with a moving mechanism.
重負荷ロッドの取付部を荷重軸と直角２方向に動かすよ
う構成したことを特徴とする特許請求の範囲第１項記載
の脆性材料の引張試験装置。(2) The movement mechanism for moving the load-bearing shaft is configured to move the crosshead and the mounting portion of the load-bearing rod in two directions perpendicular to the load shaft. Test equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2877886A JPS62187237A (en) | 1986-02-14 | 1986-02-14 | Tension testing device for brittle material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2877886A JPS62187237A (en) | 1986-02-14 | 1986-02-14 | Tension testing device for brittle material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62187237A true JPS62187237A (en) | 1987-08-15 |
Family
ID=12257858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2877886A Pending JPS62187237A (en) | 1986-02-14 | 1986-02-14 | Tension testing device for brittle material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62187237A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5370457A (en) * | 1992-10-12 | 1994-12-06 | Seiko Instruments Inc. | Thermomechanical analyzer |
| CN107941613A (en) * | 2017-11-15 | 2018-04-20 | 江苏铂影数据科技有限公司 | Biological respinse and soft tissue mechanics multifunctional testing integrated instrument |
-
1986
- 1986-02-14 JP JP2877886A patent/JPS62187237A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5370457A (en) * | 1992-10-12 | 1994-12-06 | Seiko Instruments Inc. | Thermomechanical analyzer |
| CN107941613A (en) * | 2017-11-15 | 2018-04-20 | 江苏铂影数据科技有限公司 | Biological respinse and soft tissue mechanics multifunctional testing integrated instrument |
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