Tensile-shear test device for bamboo materials

Abstract

The invention relates to a tensile-shear test device and method for bamboo materials, and belongs to the technical field of indoor loading tests. The test device is divided into three parts including a steel frame force transmission device, a test piece fixing device and a loading device, and is composed of a steel plate, a steel bar, a screw rod, a nut, a steel support, a wood test piece, an L-shaped steel clamping plate, a rectangular steel cushion block, a force sensor, a columnar steel block, a sliding rail, a jack and the like. And biaxial loading can be realized based on a common universal testing machine by means of a jack, so that the tension-shear coupling test of the bamboo materials is realized. The loading frame with a brand new structure and the test piece clamping and fixing device are designed, the overall rigidity of the device is improved, meanwhile, the stress state of the test piece in the biaxial tension shear process is ensured, and the accurate shear strength can be measured.

Description

technical field [0001] The invention relates to the technical field of indoor loading tests of bamboo and wood materials, in particular to a tension-shear test device for bamboo and wood materials. Background technique [0002] Bamboo and wood materials are one of the earliest building materials used by human beings, and they are also an important material basis for modern wooden structures. However, due to the various types of wood, which are porous and discontinuous natural plant materials, the environment varies, and the growth is uneven, the structure is complex and the mechanical properties are highly anisotropic. [0003] The mechanical behavior of wood is significantly different under different grain surfaces, different loading directions, and different fiber angles. In recent years, although many scholars have conducted in-depth research on the mechanical properties of wood under simple stress states, there is a lack of research on the mechanical properties of wood ...

AI Technical Summary

Problems solved by technology

In recent years, although many scholars have conducted in-depth research on the mechanical properties of wood under simple stress states, there is a lack of research on the mechanical properties of wood under complex stress states, especially under the coupling of tensile stress and shear stress. The specific test method is not specified in the standard, and it is an important part to grasp the mechanical properties of bamboo and wood materials under the coupling action of tensile stress and shear stress through tensile-shear test

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