Bidirectional tensile tester

A test device and biaxial stretching technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of complex structure, expensive price, inaccurate data, etc., and achieve the effect of light structure, low cost and simple operation

Inactive Publication Date: 2009-10-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problems existing in the existing two-way stretching device or can only achieve two-way constant stretching or two-way fixed-ratio stretching, or complex structure, high price, and inaccurate data, the present invention proposes a two-way tensile test device

Method used

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Embodiment Construction

[0027] This embodiment is a bidirectional tensile testing device for a cross-shaped test piece, and includes a fixed force component mechanism 32, an adjustable force component mechanism 34, a measurable force transmission mechanism 31, and an unmeasurable force transmission mechanism 33. Place the cross-shaped test piece 14 in the center of the device, and the fixed force component mechanism 32, the adjustable force component mechanism 34, the measurable force transmission mechanism 31 and the unmeasurable force transmission mechanism 33 pass through the test piece chuck and the cross shape respectively. The four directions of the test piece 14 are fixedly connected, and the cross-shaped test piece 14 is stretched. The fixed force component mechanism 32 and the adjustable force component mechanism 34 are located on the vertical axis of the cross-shaped specimen and are symmetrical to the specimen; the measurable force transmission mechanism 31 and the unmeasurable force transmiss...

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Abstract

The invention relates to a bidirectional stretching tester which comprises a fixed force-decomposing mechanism (32), an adjustable force-decomposing mechanism (34), a measurable force-transmitting mechanism (31) and an unmeasurable force-transmitting mechanism (33). The fixed force-decomposing mechanism (32), the adjustable force-decomposing mechanism (34), the measurable force-transmitting mechanism (31) and the unmeasurable force-transmitting mechanism (33) are respectively fixedly connected with the four directions of a test part (14) by test part clamps (2) and test part clamps (16) to stretch the test part (14); the fixed force-decomposing mechanism (32) and the measurable force-transmitting mechanism (31) are respectively provided with force sensors (4), and both ends of either force-transmitting mechanism use one side face of a force-decomposing arm (5) as a rail to slide by a bearing (20). The bidirectional stretching tester is mounted on a universal tester or a pressure tester, replaces supporting plates (10) with different lengths on the measurable force-transmitting mechanism to realize the longitudinal and transversal different-proportion stretching displacement of the test part, can describe the deformation situations of the test part in a whole range from monodirectional stretching to bidirectional stretching and has the advantages of portable structure, low cost and simple operation.

Description

1. Technical Field [0001] The invention relates to the technical field of material testing, in particular to a biaxial tensile testing device. 2. Background technology [0002] Since the establishment of the plate and shell theory, plate and shell structures that are subjected to bidirectional forces have been widely used in the world. At that time, due to the complexity of calculations, especially the aerospace and aerospace space containers are "two-way stress structures", many people are devoted to finding a "two-way tensile test method." At present, the "two-way tensile test" is an unsolved issue in the world. There are many two-way tensile test methods. Among them, the double-tension test of the cross-shaped specimen is the most intuitive and can directly reflect the two-way force state of the plate and shell. It is currently the most important method. [0003] At present, there are mainly two types of double tensile test devices for cross specimens. One is to be fixedly ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/00
Inventor 吴建军陈智勇
Owner NORTHWESTERN POLYTECHNICAL UNIV
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