Testing apparatus

Patent metadata

Field	Value
Publication number	US-9423329-B2
Application number	US-201514625800-A
Country	US
Kind code	B2
Filing date	Feb 19, 2015
Priority date	Mar 7, 2014
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A strength testing apparatus has a plurality of testing axes, each of which breaks a test piece in a central area thereof. The apparatus has a plurality of 1-axis testing structures each having: an actuator, which is configured to move linearly, thereby to apply a load onto a test body; an actuator fixing base, which is configured to fix the actuator at a predetermined position; a reaction base comprising a chucking tool, which is configured to chuck a test piece, in a chucking tool, which is provided at an end portion of the actuator; and a base, which is configured to connect the actuator fixing base and the reaction base, wherein all of the testing axes, each almost passing through an axial center of each actuator, come across at one (1) point, and the 1-axis testing structures are arranged so that they are included in a same plane.

First claim

What is claimed is:

1. A testing apparatus, comprising:
a plurality of 1-axis testing structures, each 1-axis testing structure comprising:
an actuator, which is configured to move linearly, thereby to apply a load onto a test body;
an actuator fixing base, which is configured to fix said actuator at a predetermined position;
a reaction base comprising a first chucking tool, which first chucking tool is configured to chuck the test body in cooperation with a second chucking tool, which second chucking tool is provided at an end portion of said actuator; and
a base, on which said actuator fixing base and said reaction base are mounted,
wherein an axis of each of the plurality of 1-axis testing structures essentially passes through an axial center of each actuator, respectively, wherein axes of the plurality of 1-axis testing structures cross at one point, and wherein said plurality of 1-axis testing structures are arranged so that the axes of the plurality of 1-axis testing structures are included in a same plane, and
wherein said base of said one of said plurality of 1-axis testing structures is movable with respect to bases of other ones of the plurality of 1-axis testing structures.

2. The testing apparatus according to claim 1 ,
wherein
under a condition that the test piece is not attached, the base of said one of said plurality of 1-axis testing structures that is configured to move is not prevented from moving by another 1-axis testing structure.

3. The testing apparatus according to claim 1 ,
wherein said plurality of 1 -axis testing structures includes a first 1-axis testing structure, a second 1-axis testing structure, and a third 1-axis testing structure, and the respective axes of each of the three 1-axis testing structures are arranged having a relationship such that the axis of the second 1-axis testing structure is offset by 90° from the axis of the first 1-axis testing structure, and the axis of the third 1-axis testing structure is offset by 45° from the axis of the first 1-axis testing structure.

4. The testing apparatus according to claim 1 ,
wherein the actuator fixing base and the reaction base are connected by the base and a rigidity assistant member.

5. The testing apparatus according to claim 4 ,
wherein the rigidity assistant member includes two or more rod members that connect the actuator fixing base and the reaction base, and each rod of the two or more rod members are in a different plane that is parallel to the plane that includes each of the axes of each of the plurality of 1-axis testing structures.

Assignees

• Hitachi Ltd
• Shimadzu Corp
• Hitachi Ltd

Inventors

• Takeda Norio
• Watanabe Shohei
• Takii Tadaoki

Classifications

• G01N2203/0256

  Triaxial, i.e. the forces being applied along three normal axes of the specimen · CPC title

• G01N2203/0016

  Tensile or compressive · CPC title

• G01N2203/0085

  Compressibility · CPC title

• G01N2203/0017

  Tensile · CPC title

• G01N2203/0252

  Monoaxial, i.e. the forces being applied along a single axis of the specimen · CPC title