Test setup suitable for uniaxial tensile testing of viscoelastic materials

Abstract

The invention discloses a test device suitable for a uniaxial tensile test on a viscous-elastic material. The test device comprises dumbbell type clamps, connection devices and a test piece, wherein one end of each dumbbell type clamp is provided with a testing machine connection hole, and the other end of the corresponding dumbbell type clamp is provided with a dumbbell type clamping slot; one end of each connection device is matched with the shape of the corresponding dumbbell type clamping slot and is embedded into the dumbbell type clamping slot; a test piece connection slot is formed in the other end of each connection device; two ends of the test piece are fixedly connected into the test piece connection slots through epoxy resin glue; the connection devices and the dumbbell type clamps which are positioned at the two ends are symmetrically arranged at two ends of the test piece. The test piece is low in processing cost; slippage between the test piece and the clamps can be avoided; the length of the test piece can be adjusted according to a test at any time, and stress concentration generated at the transitional section of the dumbbell type test piece can be avoided.

Description

technical field [0001] The invention belongs to the field of material mechanics research, in particular to a test device suitable for uniaxial tensile test of viscoelastic materials. Background technique [0002] Uniaxial tensile test is one of the important methods to study the mechanical properties of materials, and its principle is based on the quasi-static mechanical properties. Although the tensile test equipment, specimen and fixture technology of metal materials have been developed maturely, and there are related test standards, the tensile test of viscoelastic rubber materials still needs to be further developed. [0003] The problems that need to be solved in the tensile test include the preparation process of the test piece, the fixation of the test piece and the fixture, the fixation of the fixture and the testing machine, and the stress concentration problem in the test process. The document "Fatigue damage in a unidirectional SiC / Al composite due to push-pull a...

AI Technical Summary

Problems solved by technology

However, due to the change of the tensile rate during the stretching process, the slippage between the specimen and the fixture will also change, resulting in large errors in the measurement results.

Neither of these two reinforcement methods is suitable for soft, large-deformation viscoelastic materials

Images