JPS60168037A - Jig for bending test - Google Patents
Jig for bending testInfo
- Publication number
- JPS60168037A JPS60168037A JP2419184A JP2419184A JPS60168037A JP S60168037 A JPS60168037 A JP S60168037A JP 2419184 A JP2419184 A JP 2419184A JP 2419184 A JP2419184 A JP 2419184A JP S60168037 A JPS60168037 A JP S60168037A
- Authority
- JP
- Japan
- Prior art keywords
- test piece
- piston
- pressure
- cylinder
- gap
- 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
Links
Classifications
-
- 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
- G01N3/20—Investigating strength properties of solid materials by application of mechanical stress by applying steady bending forces
Landscapes
- 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
Description
【発明の詳細な説明】
本発明は材料試験用治具に関し、詳細には脆性材料の曲
げ試験用治具に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a jig for testing materials, and more particularly to a jig for testing bending of brittle materials.
従来、脆性材料の曲げ試験は１ンストロン型万能試験機
に曲げ試験用治具を取り付けて行っていた。この曲げ試
験用治具は４点曲げ方式の場合、第１図に示すように固
定された支点１０４，１０４’とこれら支点の上に置か
れた試験片１０５の」二に接触する加圧クサビ１ ０
２ 、 １ ０ ２”ａ持つ荷重合１０１とこの荷重合
の球面］． ０ １ （Ｌに係合する球面座１０３とを
備え、この球面座が試験機のクロスヘラ）’ １ ０
６に取り伺けられている。そｌ〜て試験機のクロスヘッ
ド゛を試験片１０５に向って移動させ、この試験片に２
つの加圧クサビ１０２，１０２’を押し当てることによ
り、試験片に荷重を加える。Conventionally, bending tests on brittle materials have been carried out using a 1Stron universal testing machine with a bending test jig attached. In the case of a four-point bending method, this bending test jig consists of fixed fulcrums 104, 104' and a pressure wedge that contacts the second part of the test piece 105 placed on these fulcrums, as shown in FIG. 1 0
2, 10 2"a load combination 101 and the spherical surface of this load combination]. 0 1 (Equipped with a spherical seat 103 that engages with L, this spherical seat is the cross spatula of the test machine)' 1 0
6 has been investigated. Then, move the crosshead of the tester toward the test piece 105 and apply two
A load is applied to the test piece by pressing two pressure wedges 102, 102' against it.
どちらか一方の加圧クサビと試験片に間隙があれば、他
方の加圧クサビは試験片から反力を受け、荷重合１０１
は球面座１０３でのずべりにより回転１，、間隙を埋め
、２つの加圧クサビを介しＣ等しい荷重が試験片に加わ
ることになる。以上のように４点曲げ方式の曲げ試験用
治具は２つの加圧クサビを介して試験片に付加される荷
重が共に等しくなることを目的としている。しかしなが
らこの曲げ試験用治具には次のような欠点がある。第一
に球面付荷重合自身がかなりの重量物であり、また球面
と球面座との間に摩擦があるため、球面付荷重合の回転
が十分に行われないという欠点を有していた。このため
実際の曲げ試験では、測定荷重伺近まで荷重を付加し、
試験片と加圧クサビをなじませた後に、再び荷重をかけ
なおす方法をとっている。また第１図に示すように、荷
重が加わる方向をＹ −Ｙ’力方向し、支点上に置かれ
た試験片の長手方向をＸ−Ｘ′力方向すると、ｘ−ｘ’
力方向Ｙ−Ｙ’力方向つくる平面に垂直なｚ−ｚ’力方
向は、荷重が増すに従って球面付荷重合が回転しやす（
なり、不安定になる。そのため、球面付荷重合と球面座
をある程度の拘束状態になるよう緩く結合しなければな
らない。そうすると増々球面座での摩擦は大きくなり間
隙を埋めるための回転は十分に行われた（なる傾向にな
り、２つの加圧クサビを介して等しい荷重を試験片に伺
加するのが難かしかった。第二に球面座と球面の接触面
積が広く、寸法および粗さを精度良くするには加工費が
高くなるという欠点を有していた。If there is a gap between one of the pressure wedges and the test piece, the other pressure wedge will receive a reaction force from the test piece, causing a load total of 101
The gap is filled by rotation 1 due to shear on the spherical seat 103, and a load equal to C is applied to the test piece through the two pressure wedges. As described above, the purpose of the four-point bending type bending test jig is to equalize the loads applied to the test piece through the two pressure wedges. However, this bending test jig has the following drawbacks. First, the spherical load assembly itself is quite heavy, and since there is friction between the spherical surface and the spherical seat, the spherical load assembly has the drawback of not being able to rotate sufficiently. For this reason, in the actual bending test, the load is applied until it approaches the measured load.
After the test piece and pressure wedge have been blended together, the load is reapplied. Furthermore, as shown in Figure 1, if the direction in which the load is applied is the Y-Y' force direction, and the longitudinal direction of the test piece placed on the fulcrum is the X-X' force direction, then x-x'
Force direction Y-Y' Force direction The z-z' force direction perpendicular to the plane created means that as the load increases, the spherical surface load joint tends to rotate (
and become unstable. Therefore, the spherical load joint and the spherical seat must be loosely connected so that they are restrained to some extent. As a result, the friction on the spherical seat increased and enough rotation was made to fill the gap (this tended to occur), making it difficult to apply an equal load to the test piece via the two pressure wedges. Second, the contact area between the spherical seat and the spherical surface is large, and it has the disadvantage that processing costs are high in order to improve the precision of dimensions and roughness.
本発明の目的は上記の如き従来技術の欠点を解消した曲
げ試験用治具を提供することにある。An object of the present invention is to provide a bending test jig that eliminates the drawbacks of the prior art as described above.
以下、本発明の実施例を第２図を参照して詳細に説明す
る。Hereinafter, embodiments of the present invention will be described in detail with reference to FIG.
第２図には本発明を実施する曲げ試験用治具が示してあ
り、この治具は通常のクロスヘッドゝ工３に取付けられ
たシリンダブロック１２を備えている。このシリンダブ
ロックには複数、例えば２つの７リングー６．６′が設
けられている。これらシリンダー内には一つの実施例で
は５等しい直径を有するピストン１，１′が摺動自在に
挿入されている。FIG. 2 shows a bending test fixture embodying the invention, which fixture includes a cylinder block 12 mounted on a conventional crosshead machine 3. This cylinder block is provided with a plurality of, for example two, 7-rings 6.6'. In one embodiment, five pistons 1, 1' of equal diameter are slidably inserted into these cylinders.
尚、符号８，８′はＯリングを示す。これらピストンか
らはピストンロッド９，９′が延び、これらピストンロ
ットゝの先端には加圧クサビ２，２′が取付けられてい
る。これら加圧クサビは支点４，４′の上に置かれた試
験片５に接触するように配置されている。支点４，４′
は固定台２０．２０’に設けられた脚２１．２１’の上
に数句けられている。尚、符号２２．２２’は脚２１．
２１’と固定台２０．２０’との間に配置された荷重計
である。Note that numerals 8 and 8' indicate O-rings. Piston rods 9, 9' extend from these pistons, and pressure wedges 2, 2' are attached to the tips of these piston rods. These pressure wedges are arranged so as to contact the test piece 5 placed on the fulcrums 4, 4'. Fulcrum 4, 4'
are written on the legs 21.21' provided on the fixed base 20.20'. In addition, the reference numerals 22 and 22' indicate the legs 21.
21' and the fixed base 20. This is a load cell placed between the fixed base 20 and 20'.
シリンダー６．６′の一端はブツシュ１０．１０’によ
って閉じられ、ピストンロッド９，９′はこれらノツソ
ユに設けられた中心孔の中に摺動自在に且つ蜜月的に挿
入されている。シリンダーの１ストン側は流路３によっ
て連通され、これらシリンダーおよび流路内には流体、
例えば油１１が充填されている。One end of the cylinder 6.6' is closed by a bushing 10.10', and the piston rods 9,9' are slidably and honeycombingly inserted into the central bore provided in these bushings. The 1st ton side of the cylinder is communicated by a flow path 3, and fluid,
For example, oil 11 is filled.
尚、シリンダブロックにはシリンダーに油を充填する人
口１５が設けられ、この人口は盲栓７によって栓をされ
ている。Incidentally, the cylinder block is provided with a port 15 for filling the cylinder with oil, and this port is plugged with a blind plug 7.
上記治具の作用は以下の通りである。The function of the above jig is as follows.
支点４，４′の上に試験片５を置き、次いでクロスヘラ
ｌ−’に取付けられたシリンタフロック１２を試験片５
に向って移動させ加圧クサビ２，２′を弁して試験片に
荷車を加える。このとき二つの加圧クサビが同時に試験
片に接触せず、どれらか−力の加圧クサビと試験片との
間に間隙があれば、最初に試験片に接触した加圧クサビ
は試験片からの反力でピストンを押し上げる。シリンダ
ー内の油は反力をピストンの受圧面積で除した値の圧力
まで上昇する。パスカルの原理により、この圧力は池内
を伝播し、その圧力で間隙のある方のピストンを押し下
げる。そして試験片との間隙を埋めることができる。上
記の曲げ試験用治具はシリンダーおよび流路内の油を密
封しておく形式であるが、これとは別に２つのシリンダ
ー内に等しい圧力を持つ油を他の油圧源から供給し、ン
リングーブロノクを移動させず、ピストンのみを試験片
に向って移動させ、加圧クサビを介して荷重を伺加する
形式にしてもよい。この形式は圧〕Ｎから供給される油
の圧力によって試験片に加わ石荷車が決定される。この
形式の用途には脆性材料の破壊力学的な試験として行わ
れる一定荷重ダプルトーション試験があり、利用価値か
高い。上記のように、本発明によれは、一方の加圧クサ
ビと試験片との間に間隙がル）つてもこの間隙は直ちに
矯正される。The test piece 5 is placed on the fulcrums 4 and 4', and then the cylinder block 12 attached to the cross spatula l-' is placed on the test piece 5.
The cart is moved toward the test piece, and the pressure wedges 2 and 2' are valved to add the cart to the test piece. At this time, if the two pressure wedges do not touch the test piece at the same time, and if there is a gap between the pressure wedge and the test piece, the pressure wedge that came into contact with the test piece first will The reaction force from pushes up the piston. The oil in the cylinder rises to a pressure equal to the reaction force divided by the pressure-receiving area of the piston. Due to Pascal's principle, this pressure propagates through the pond and pushes down the piston with the gap. The gap with the test piece can then be filled. The above-mentioned bending test jig is of a type that seals the oil in the cylinder and flow path, but it also supplies oil with equal pressure to the two cylinders from another hydraulic source. It is also possible to use a method in which only the piston is moved toward the test piece without moving the block, and the load is applied via a pressure wedge. In this type, the pressure of oil supplied from [Pressure]N is applied to the test piece to determine the stone cart. This type of application includes the constant load double torsion test, which is performed as a fracture mechanics test for brittle materials, and has high utility value. As described above, according to the present invention, even if a gap is created between one of the pressure wedges and the test piece, this gap is immediately corrected.
よた２つのヒ０ストンの受圧面積が等しいので、２つの
加■クサビを介して試験片に４＝ｊ加さ、ｌ］、る荷重
は等しくなり、又、ピストンロットとプノンユとの摺動
によりヒ０ストンが動く方向は常に一定しており、従来
型のｚ−ｚ’力方向の回転による不安定さは解消される
。史Ｋ、本発明の曲げ試１験用冶具において、精ｊ岐よ
く仕上加工をするのはピストンのＯリング尚と７リング
一内面だけでよく、その仕上加工の面積は従来型の球面
に比して小さくなるので加工費が安価になるという実益
かあて）。Since the pressure-receiving areas of the two piston rods are equal, the loads applied to the test piece through the two stress wedges (4=j, l) are equal, and the sliding between the piston rod and the piston rod is Therefore, the direction in which the histostone moves is always constant, and the instability caused by rotation in the direction of the zz' force in the conventional type is eliminated. In the bending test jig of the present invention, only the O-ring and the inner surface of the 7th ring of the piston need to be carefully finished, and the finishing area is smaller than that of the conventional spherical surface. (The practical benefit is that the processing cost will be lower because it will be smaller and the processing cost will be lower.)
第１図は従来の曲げ試、験用治具の断面図、第２図は本
発明の曲げ試、験用冶具の断面図である。
１．１′・ ピストン ２，２′・・・加圧クサビ３・
・・流路 ４，４′・・・支点
５・・・試験片 ６，６′・・シリング−９，９′・・
・ピストンロット’１１ ・油１２・・・ノリンターブ
ロック１３・・・クロスヘッド゛毛１図FIG. 1 is a cross-sectional view of a conventional bending test jig, and FIG. 2 is a cross-sectional view of the bending test jig of the present invention. 1.1'・Piston 2,2'...Pressure wedge 3.
...Flow path 4,4'...Fully point 5...Test piece 6,6'...Schilling-9,9'...
・Piston rod '11 ・Oil 12...Norinter block 13...Cross head hair 1
Claims (1)
と、該シリンダブロックに設けられた複ＩＪノシリンダ
ーと、該複数のシリンダー内に摺動自在に挿入された且
つシリンダー内の流体［Ｅにより移動し得るピストン るピストン１コノ）パの先端に試験片に接触する加圧ク
サビが設けられ、前記各シリンダー内の流体圧が等しく
なるように各シリンダー間が流路で連通されて成る曲げ
試験用治具。 ２、各＋−”ストンの流体受圧面積が等しく設定されて
いる特許請求の範囲第１項の治具。 ３、各ピストンの流体受圧面積が加圧クサビを介して試
験片に加わる荷重を夫々のピストンの流体受圧面積に対
応するように異なって設定されていＡ栽杵Ｂ書束の節聞
籏１−ｓｕ＊己載の治し。[Claims] 18. A cylinder block attached to a crosshead, a multiple IJ cylinder provided in the cylinder block, and a fluid in the cylinder slidably inserted into the plurality of cylinders. A pressure wedge that contacts the test specimen is provided at the tip of the piston (1) that can be moved by E, and each cylinder is communicated with a flow path so that the fluid pressure in each cylinder is equal. Jig for bending test. 2. The jig according to claim 1, in which the fluid pressure receiving area of each +-" piston is set to be equal. 3. The fluid pressure receiving area of each piston is set to be equal to the load applied to the test piece through the pressure wedge. It is set differently to correspond to the fluid pressure receiving area of the piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2419184A JPS60168037A (en) | 1984-02-10 | 1984-02-10 | Jig for bending test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2419184A JPS60168037A (en) | 1984-02-10 | 1984-02-10 | Jig for bending test |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60168037A true JPS60168037A (en) | 1985-08-31 |
| JPH0344258B2 JPH0344258B2 (en) | 1991-07-05 |
Family
ID=12131432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2419184A Granted JPS60168037A (en) | 1984-02-10 | 1984-02-10 | Jig for bending test |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60168037A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2624605A1 (en) * | 1987-12-09 | 1989-06-16 | Armines | Apparatus for carrying out bending tests with four support points |
| CN103487332A (en) * | 2013-09-26 | 2014-01-01 | 无锡俊达测试技术服务有限公司 | Device for testing bending resistance of objects |
| WO2016102084A1 (en) * | 2014-12-23 | 2016-06-30 | Hydro Aluminium Rolled Products Gmbh | Device for carrying out a bending test |
| KR102347828B1 (en) * | 2021-11-19 | 2022-01-06 | (주)엠테스 | Bending fatigue test system of power core for floating offshore wind power dynamic cable |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232267A (en) * | 1975-09-05 | 1977-03-11 | Citizen Watch Co Ltd | Ic packaging construction |
| JPS5889850U (en) * | 1981-12-14 | 1983-06-17 | 大東産商株式会社 | Welded joint bending tester |
-
1984
- 1984-02-10 JP JP2419184A patent/JPS60168037A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5232267A (en) * | 1975-09-05 | 1977-03-11 | Citizen Watch Co Ltd | Ic packaging construction |
| JPS5889850U (en) * | 1981-12-14 | 1983-06-17 | 大東産商株式会社 | Welded joint bending tester |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2624605A1 (en) * | 1987-12-09 | 1989-06-16 | Armines | Apparatus for carrying out bending tests with four support points |
| CN103487332A (en) * | 2013-09-26 | 2014-01-01 | 无锡俊达测试技术服务有限公司 | Device for testing bending resistance of objects |
| WO2016102084A1 (en) * | 2014-12-23 | 2016-06-30 | Hydro Aluminium Rolled Products Gmbh | Device for carrying out a bending test |
| US10048181B2 (en) | 2014-12-23 | 2018-08-14 | Hydro Aluminium Rolled Products Gmbh | Device for performing a bending test |
| KR102347828B1 (en) * | 2021-11-19 | 2022-01-06 | (주)엠테스 | Bending fatigue test system of power core for floating offshore wind power dynamic cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0344258B2 (en) | 1991-07-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| O’donnell | The additional deflection of a cantilever due to the elasticity of the support | |
| WO1995031887A3 (en) | Exothermic fatigue measurement method of viscoelastic body and hydraulic servo system flexometer | |
| CN109269891A (en) | A kind of true triaxial loading device and test method suitable for false three-axis tester | |
| CN103790895A (en) | Hydraulic-cylinder lateral force testing device | |
| CN113237768A (en) | Medium strain rate test equipment and method with axial pressure and confining pressure control loading | |
| JPS60168037A (en) | Jig for bending test | |
| CN105510118B (en) | Symmetrical line contacts fretting fatigue testing fine motion load charger | |
| CN112284888B (en) | Sample clamp for Brazilian splitting and using method | |
| CN113138071B (en) | Test device for applying bidirectional compression load | |
| RU2071599C1 (en) | Method of evaluation of mechanical properties of thin-walled reinforced concrete structure under action of stretching and compression and device for its implementation | |
| Lim et al. | The effects of concurrent cold-expansion and ring-indentation on the growth of fatigue cracks emanating from circular holes | |
| Masuko et al. | Behaviour of the horizontal stiffness and the micro-sliding on the bolted joint under the normal pre-load | |
| CN214121853U (en) | High confining pressure rock mechanical property test device | |
| CN105179533A (en) | Double-cylinder force measuring brake caliper | |
| CN215985490U (en) | Splitting mold for square block | |
| CN112611646A (en) | High confining pressure rock mechanical property test device and test method | |
| CN212568269U (en) | Testing machine for anchor plate strength static load bearing test | |
| US3481190A (en) | Pressure vessel for stressing work specimens | |
| CN112345344A (en) | Axial and radial integrated extensometer | |
| CN206002077U (en) | A kind of cuboid sample lateral displacement measurement apparatus | |
| CN205280513U (en) | Device of survey ground cylinder appearance shear strength index | |
| JPS6135953Y2 (en) | ||
| CN214472400U (en) | Auxiliary multipoint loading device of hydraulic machine | |
| CN217845827U (en) | Multi-cylinder support test frame structure | |
| Folta | Strength testing under multi-axial stress states |