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JPS618636A - Three-axis measuring method of columnar test piece - Google Patents

Three-axis measuring method of columnar test piece

Info

Publication number
JPS618636A
JPS618636A JP12879884A JP12879884A JPS618636A JP S618636 A JPS618636 A JP S618636A JP 12879884 A JP12879884 A JP 12879884A JP 12879884 A JP12879884 A JP 12879884A JP S618636 A JPS618636 A JP S618636A
Authority
JP
Japan
Prior art keywords
test piece
arresting body
annular
reaction force
epsilons
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
Application number
JP12879884A
Other languages
Japanese (ja)
Inventor
Hiromichi Yoshikawa
吉川　弘道
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.)
Hazama Ando Corp
Original Assignee
Hazama Gumi Ltd
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 Hazama Gumi Ltd filed Critical Hazama Gumi Ltd
Priority to JP12879884A priority Critical patent/JPS618636A/en
Publication of JPS618636A publication Critical patent/JPS618636A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01L1/2218—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being of the column type, e.g. cylindric, adapted for measuring a force along a single direction

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

PURPOSE:To easily measure the strain of a columnar test piece in three axial directions by fitting an annular arresting body onto the cylindrical part of the test piece, fitting a strain gauge to the arresting body, and applying force in the direction of the column axis. CONSTITUTION:The annular arresting body 2 is fitted onto the flank cylinder part of the columnar test piece. The annular arresting body 2 is made of a material with a high elastic modulus and the strain gauge 3 is stuck on its surface. When a load 10 is placed in the axial direction of the test piece, the body 1 expands radially by the Poisson effect to generate reaction force P in the arresting body 2. The reaction force is expressed by P=r.t.epsilonS.ES. In this case, the annular arresting body has a radius (r), thickness (t), circumferential strain epsilonS, and elastic modulus ES. At this time, (r), (t), and ES are known, so the reaction force P, i.e. radial stress is found by measuring epsilonS. Consequently, the stress in the columnar test piece in three axial directions is measured speedily from the axially applied force and measured value of the strain gauge.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、円柱供試体における３軸の応力測定方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for measuring triaxial stress in a cylindrical specimen.

〔従来技術とその問題点〕[Prior art and its problems]

従来コンクリート、プラスチックまたは一般材料の３軸
における圧縮せん断試験を行う場合は、円柱状または角
柱、状の供試体を用い、先づ一軸即ち鉛直方向の圧縮試
験を行い、ついで周方向の加力装置により圧縮せん断試
験を行うなど、個別に３軸応力状態を付与する独立した
試験装置を必要としていた。従って供試体も複数個必要
とし、試験結果を得るのに時間がかかるなどの不都合が
あった。Conventionally, when performing a compression shear test on concrete, plastic, or general materials in three axes, a cylindrical or prismatic specimen is used, and the compression test is first performed in the uniaxial, or vertical, direction, and then a circumferential applying device is used. An independent test device was required to individually apply triaxial stress states, such as compression shear tests. Therefore, there are disadvantages such as requiring a plurality of specimens and taking time to obtain test results.

〔発明の目的〕[Purpose of the invention]

本発明は円柱供試体において軸方向力のみにより３軸測
定を行い、測定の簡易化と迅速化を図る測定方法を提供
する。The present invention provides a measurement method that performs triaxial measurement using only axial force on a cylindrical specimen, thereby simplifying and speeding up the measurement.

〔発明の構成〕[Structure of the invention]

本発明は、円柱供試体の測面円筒部に円環拘束体を嵌着
し、前記円柱供試体に軸方向力を加え円環拘束体のびず
みな測定して供試体の３軸応力測定な行う円柱供試体の
３軸測定方法である。The present invention measures the triaxial stress of a cylindrical specimen by fitting an annular restraint body into the surface-measured cylindrical portion of a cylindrical specimen, applying an axial force to the cylindrical specimen, and measuring the deflection of the annular restraint. This is a three-axis measurement method for cylindrical specimens.

〔実施例〕〔Example〕

本発明の実施例について説明すると、第１図は円柱供試
体１の側面円筒部に円環拘束体２を嵌着した状態をあら
れす斜視図であり、円環拘束体２は弾性係数の高い材料
で作られ表面の所要個所にはひずみゲージ３が貼着され
ている。To explain an embodiment of the present invention, FIG. 1 is a perspective view of a state in which an annular restraint body 2 is fitted to a side cylindrical portion of a cylindrical specimen 1, and the annular restraint body 2 has a high elastic modulus. It is made of material, and strain gauges 3 are affixed to required locations on the surface.

第２図は円柱供試体１に軸方向荷重１０を加えた場合、
円環拘束体２に作用する応力の状態をあられす説明図で
ある。つぎに測定方法について説明すると、円柱供試体
１の軸方向に軸方向荷重１０を加力した場合ポアソン効
果により円柱供試体１はその半径方向に膨張する。その
ために円環拘束体２に反力が生じ、その反力をＰとする
と、Ｐの値は ｐ＝＝　ｒ＋＋　ｔａ　Ｇ ＝ｒ＊ｔ・（Ｂ・Ｅ８　　　　　　・・・（α）にて表
される。Figure 2 shows when an axial load of 10 is applied to the cylindrical specimen 1.
FIG. 2 is an explanatory diagram showing the state of stress acting on the annular restraint body 2. FIG. Next, the measurement method will be explained. When an axial load 10 is applied in the axial direction of the cylindrical specimen 1, the cylindrical specimen 1 expands in its radial direction due to the Poisson effect. Therefore, a reaction force is generated in the annular restraint body 2, and if that reaction force is P, the value of P is expressed as p== r++ ta G = r*t・(B・E8...(α) Ru.

であり、（ａ）式においてｒ、ｔ、Ｅ８は既知の値であ
るから、Ｊの値をひずみゲージ３により測定すれば円環
拘束体２０反反力１即ち円柱供試体１の半径方向に作用
する応力を求めることかできる。In equation (a), r, t, and E8 are known values, so if the value of J is measured by the strain gauge 3, the reaction force 1 of the annular restraint body 20, that is, the reaction force 1 in the radial direction of the cylindrical specimen 1 It is possible to find the stress that acts.

また、円環拘束体２の厚さｔまたは弾性係数Ｅ８の異な
った材料を使用することにより種々の３軸状態をつくる
ことができ、円柱供試体１の側方応力の比率を調整し異
なった状態の応力状態を求めることが可能である。In addition, by using materials with different thicknesses t or elastic modulus E8 of the annular restraint body 2, various triaxial states can be created, and by adjusting the ratio of lateral stress of the cylindrical specimen 1, different It is possible to determine the stress state of a state.

〔発明の効果〕〔Effect of the invention〕

以上説明した如く、本発明は円柱供試体の軸方向の加力
とひずみゲージの計測値のみから簡易かつ迅速に３軸の
応力を測定できる測定方法である。As explained above, the present invention is a measurement method that can easily and quickly measure triaxial stress from only the axial force applied to a cylindrical specimen and the measured values of strain gauges.

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

第１図は円環拘束体を嵌着した円柱供試体の斜視図、第
２図は円柱供試体および円環拘束体の応力状態の説明図
である。FIG. 1 is a perspective view of a cylindrical specimen fitted with an annular restraint, and FIG. 2 is an explanatory diagram of the stress state of the cylindrical specimen and the annular restraint.

Claims (1)

【特許請求の範囲】[Claims] 円柱供試体の測面円筒部に円環拘束体を嵌着し、前記円
柱供試体に軸方向力を加え円環拘束体のひずみを測定し
て供試体の３軸応力測定を行う円柱供試体の３軸測定方
法。A cylindrical specimen in which an annular restraint body is fitted into the surface-measured cylindrical portion of the cylindrical specimen, and an axial force is applied to the cylindrical specimen and the strain of the annular restraint body is measured to measure the triaxial stress of the specimen. 3-axis measurement method.
JP12879884A 1984-06-22 1984-06-22 Three-axis measuring method of columnar test piece Pending JPS618636A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12879884A JPS618636A (en) 1984-06-22 1984-06-22 Three-axis measuring method of columnar test piece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12879884A JPS618636A (en) 1984-06-22 1984-06-22 Three-axis measuring method of columnar test piece

Publications (1)

Publication Number Publication Date
JPS618636A true JPS618636A (en) 1986-01-16

Family

ID=14993695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12879884A Pending JPS618636A (en) 1984-06-22 1984-06-22 Three-axis measuring method of columnar test piece

Country Status (1)

Country Link
JP (1) JPS618636A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009002124A (en) * 2007-06-25 2009-01-08 Yokohama National Univ Multi-shell structural material and its uniaxial compression test method
US8042240B2 (en) 2007-01-26 2011-10-25 Honda Motor Co., Ltd. Machine tool
CN104749032A (en) * 2015-04-16 2015-07-01 湖南大学 Testing device for internal stress of soil-rock mixture or concrete
JP2016125962A (en) * 2015-01-07 2016-07-11 清水建設株式会社 Triaxial frost heaving test device and measurement method of three-dimensional freezing expansion characteristic of soil
KR20190137337A (en) * 2018-06-01 2019-12-11 경희대학교 산학협력단 A method for determining average radial stress and pressure vs. volume relationship of a compressible material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8042240B2 (en) 2007-01-26 2011-10-25 Honda Motor Co., Ltd. Machine tool
JP2009002124A (en) * 2007-06-25 2009-01-08 Yokohama National Univ Multi-shell structural material and its uniaxial compression test method
JP2016125962A (en) * 2015-01-07 2016-07-11 清水建設株式会社 Triaxial frost heaving test device and measurement method of three-dimensional freezing expansion characteristic of soil
CN104749032A (en) * 2015-04-16 2015-07-01 湖南大学 Testing device for internal stress of soil-rock mixture or concrete
KR20190137337A (en) * 2018-06-01 2019-12-11 경희대학교 산학협력단 A method for determining average radial stress and pressure vs. volume relationship of a compressible material

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