Three-point bending test apparatus

A test device, three-point bending technology, applied in the direction of measuring device, applying stable tension/pressure to test material strength, instruments, etc., can solve problems affecting test results, uneven surface of test pieces, etc.

Active Publication Date: 2016-05-04
上海秦耀航空试验技术有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a three-point bending test device, which can solve the problem that the test result is affected by the uneven surface of the test piece

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Embodiment Construction

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below in conjunction with the drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the invention. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] In describing the present invention, it is to be understood th...

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Abstract

The invention relates to the field of material performance testing technology, and especially relates to a three-point bending test apparatus. The three-point bending test apparatus comprises the following components: a base body, whose top is provided with a first support and a second support which are parallelly arranged; a test member, which is arranged on the first support and the second support; a pressure head, which is used for extruding the test member; a rotary pressing bench, which is arranged on the pressure head; an upper rotating shaft, which is rotatably arranged on the upper surface of the rotary pressing bench around an axis of the upper rotating shaft; a cover plate, which is arranged on the upper rotating shaft, and the top surface of the cover plate is vertically connected to a pressure rod of a pressure testing device. Directions of acting forces of the three-point bending test apparatus can be automatically adjusted by the effects of the rotary pressure head and the upper rotating shaft which rotate around axes of one's own, so that acting forces which are distributed on three lines, including the test member and the pressure head, the first support and the second support are always kept uniform; when the surface of the test member is rough or the upper and the lower surfaces of the test member are not parallel, test failure caused by compression due to partial stress concentration is avoided.

Description

technical field [0001] The invention relates to the technical field of material performance testing, in particular to a three-point bending test device. Background technique [0002] The bending test is an important test method for measuring the bending stiffness, strength, and load-deflection properties of composite laminates. Domestic and foreign standards such as ASTMD7264, ASTMD790, HB7617-1998, and ASTMC1341 all provide the use of bending tests to measure the bending stiffness, strength, and Specific test methods for load-deflection properties. [0003] In the three-point bending test, the bending deformation of the composite laminate under the joint action of the support and the indenter requires that the surface of the specimen be flat and parallel to the upper and lower sides, so that the force can be evenly distributed between the composite material and the indenter, The three lines that the supports touch. However, in actual tests, after the existing composite ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0003G01N2203/0019G01N2203/0037
Inventor 乔永乐李磊沈薇程鹏飞
Owner 上海秦耀航空试验技术有限公司
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