A Beam Type Conversion Device for Drop Weight Impact Tensile Test that Can Eliminate the Influence of Inertial Force

Abstract

The invention discloses a beam type conversion device capable of eliminating the inertia effect in a drop-hammer impact tensile test, belongs to the technical field of testing equipment. The beam type conversion device comprises a drop hammer test machine, a beam type force transmission direction conversion mechanism, a limiting framework and a test piece connecting piece. With the adoption of the beam type conversion device provided by the invention, vertical impact load of the drop hammer is transformed into horizontal tension load, so that the inertia effect caused by vertical impact of the hammer head of the drop hammer test machine is eliminated; at the same time, the test device is simple in structure construction, not liable to overall buckling, simple to process and manufacture, and easy to control; besides, as the limiting framework is adopted, the tensile deformation of test pieces during testing is precisely controlled, the test safety is ensured; by regulating the size of the test piece and the falling weight energy, the test loading strain rate can be regulated, and both the strain rate effect and the dynamic mechanical property of practical engineering structure materials under impact load are simulated.

Description

technical field [0001] The invention belongs to the technical field of test equipment, and in particular relates to a beam-type conversion device for a drop-weight impact tensile test that can eliminate the influence of inertial force. Background technique [0002] At present, the equipment for tensile testing of structural impact resistance performance can be mainly divided into two types according to the range of material loading strain rate, which correspond to the Hopkinson bar test device used for high strain rate and the drop hammer used for medium-speed impact. Impact device, and fast-loading actuators for low-speed impacts. A large number of examples in actual engineering belong to the medium and low speed impact process. For the test of such problems, the drop hammer impact device is a simple and reliable loading device. [0003] In the existing falling weight vertical impact tensile conversion device, the falling weight falls vertically along the guide rail, and v...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the existing falling weight vertical impact tension conversion device is difficult to reasonably quantify the inertial force and the size of the specimen is limited when measuring the load, and the existing drop weight impact tension test truss conversion device has complex node structure and small lateral stiffness. The purpose of the invention is to provide a new type of drop weight impact tension test beam conversion device that can eliminate the influence of inertial force. The test device can eliminate the influence of inertial force on test results and perform horizontal stretching under the action of vertical impact load At the same time, the structure of the device is simple, it is not easy to cause lateral instability, and the manufacturing is simple and easy to control, and the tensile deformation of the test specimen can be accurately controlled through the limit frame, which ensures the safety of the test, facilitates the design and manufacture of the test device, and can be compared Realistically simulate the dynamic mechanical properties of various materials in the actual structure under impact loads

Images