Bending and anti-cracking performance testing device and testing method

Abstract

The invention discloses a bending and anti-cracking performance testing device and a testing method. The testing device comprises a base, clamping mechanisms, force application mechanisms and a bending guiding mechanism, wherein the clamping mechanism is used for clamping a test piece; the force application mechanisms are used for supporting and driving the clamping mechanism; when one pair of theforce application mechanisms get close to each other, the test piece is bent and the clamping mechanisms located at the end parts of the force application mechanisms are driven to rotate in the forceapplication mechanisms; and the bending guiding mechanism is used for limiting the test piece to be bent in the direction of the bending guiding mechanism. According to the bending and anti-crackingperformance testing device, the clamping mechanisms rotate in the force application mechanisms so as to prevent the test piece from being subjected to a counter force to crack a clamping position; theforce application mechanisms get close to each other to drive the test piece to bend, and influences, caused by stress concentration, on bending and cracking of the test piece, are reduced, so that the accuracy of testing results is improved; and the bending guiding mechanism is arranged and the bending direction is controllable when the test piece is bent, so that photographing equipment is fixed at a certain part when operation including photographing, collection and the like needs to be carried out and other positions do not need to be adjusted, and a test is carried out smoothly.

Description

technical field [0001] The invention relates to the technical field of testing, in particular to a bending crack resistance testing device and testing method. Background technique [0002] With the rapid development of my country's economy, more and more engineering projects such as concrete dams and steel bridges are being constructed and put into use. Often these engineering projects are used in harsh environments—for example, accompanied by strong winds and severe weather conditions, used for walking or driving, etc., resulting in the construction materials used in these engineering projects are prone to bending and fracture under extreme conditions, resulting in Seriously affect the normal use of engineering projects. By testing the bending crack resistance of building materials and confirming whether they match the use environment, etc., avoid bending fractures of building materials during actual use as much as possible. [0003] In the prior art bending crack resista...

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Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the test piece in the test device in the prior art is prone to stress concentration when the external loading equipment is applied, which affects the accuracy of the test, thereby providing a bending crack resistance test Device and test method

[0008] Another technical problem to be solved by the present invention is to overcome the defect that the test fixture in the prior art is easy to generate reaction force on the test piece, thus affecting the test accuracy, so as to provide a bending crack resistance test device and test method

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