Adjustable multi-adaptive three-point bending test device

Abstract

The invention provides an adjustable multi-adaptive three-point bending test device which comprises an upper pressure head, two lower pressure heads and a base. A T-shaped groove is formed in the base; two T-shaped nuts are arranged on the T-shaped groove and can slide in the T-shaped groove; threaded holes are respectively formed in the top and side faces of the T-shaped nuts; the lower pressure heads comprise vertical parts and horizontal parts; tops of the vertical parts are used for arranging test pieces; through holes are formed in the horizontal parts and are connected with threaded holes in the tops of the T-shaped nuts; two fine-grained long bolts are arranged in the T-shaped groove; heads of the two fine-grained long bolts are respectively exposed out of two ends of the T-shaped groove; screw rods of the two fine-grained long bolts are respectively matched with threaded holes in side faces of the two T-shaped nuts; and the positions of the lower pressure heads in the T-shaped groove can be adjusted by rotating the head of the fine-grained long bolts. Multiple types of three-point bending tests can be adapted by replacing the pressure heads, different testing machine fixtures can also be adapted by replacing the upper pressure head and the base support, and the device has the characteristics of high stability, simplicity in operation and the like.

Description

technical field [0001] The invention belongs to the technical field of material mechanical performance testing and characterization, and in particular relates to an adjustable and multi-adaptive three-point bending test device. Background technique [0002] In recent years, with the continuous progress in the research on the performance of composite materials, more and more composite materials have been used in aviation, aerospace, military and other fields, and the research methods of materials are worthy of further improvement to improve research efficiency. Although the test plan cannot be changed, the efficiency of scientific research can be improved by improving the test equipment. Therefore, improving the test equipment has become the only way for most scholars at home and abroad to study emerging composite materials. [0003] The bending performance, interlaminar shear performance and fracture toughness type II performance of the material are all measured by three-po...

AI Technical Summary

Problems solved by technology

This kind of fixture can only be used for a three-point bending test, and the loading indenter and the supporting indenter cannot be guaranteed to be vertical. When the span between the supporting indenters is adjusted during the test, the distance between the two indenters must be adjusted manually. Adjustments may not be accurate and may not be parallel

Images