A metal sheet tensile and compressive experimental device in the form of a purely mechanical structure

Abstract

The invention discloses a metal plate pulling-pressing experiment device in a pure mechanical structure form. The device comprises an upper connection rod, a locking nut, an upper clamp block (I), an upper clamp block (II), a lateral clamping plate, a lower clamp block (I), a lower clamp block (II), guide rollers, a clamp base plate, and a lower connection base plate, and is characterized in that two sides of a test piece are clamped by the lateral clamping plate, the upper end of the test piece is clamped by the upper clamp block (I) and the upper clamp block (II), then the upper clamp block (I) and the upper clamp block (II) are connected by the upper connection rod, through the locking nut, the upper connection rod is locked on a sensor of a tensile test machine, two side of the lower end of the test piece are provided with a guide roller respectively, the lower end of the test piece is clamped by the lower clamp block (I) and the lower clamp block (II), and then the lower clamp block (I) and the lower clamp block (II) are fixed by the clamp base plate. Through simple mechanical principle and mould technology, pricy hydraulic equipment and air pressure equipment are not needed, the structure is simple, the processing is easy, the experiment cost is saved, the operation is convenient, and the experiment results are precise.

Description

technical field [0001] The invention relates to the technical field of material mechanics and performance research, in particular to a metal sheet tension and compression experimental device in the form of a purely mechanical structure. Background technique [0002] In the field of sheet metal forming, the experimental methods used to study the properties of the sheet and check whether the sheet meets the specified standards mainly include tensile, shrinkage, fatigue, and creep experiments. Using the data obtained from the experiment, the stress-strain relationship, Bauschinger effect, fatigue strength, and basic elastic limit, elongation, elastic modulus, reduction of area, strength and other performance indicators of the material can be obtained. The mechanical properties and characteristics of the plates obtained from the above experiments are extremely important in guiding subsequent related experiments and actual production, and all the above experiments can be carried ...

AI Technical Summary

Problems solved by technology

The fixtures used in the literature "Continuous, large strain, tension / compression testing of sheet material" and "A sheet tension / compression test forelevated temperature" can only prevent buckling of the measurement site, and additional hydraulic chucks and hydraulic lateral clamping are required device, the structure is relatively complex, and the equipment cost is relatively high

Moreover, due to the limitation of the fixture, only the experiment at a temperature below 400°C can be realized, and the tension-compression experiment at a higher temperature cannot be realized; the fixture used in the document "Elastic–plastic behavior of steel sheets under in-plane cyclic tension–compression at large strain" cannot Axial loading and centering can be achieved, and the thickness change of the plate cannot be compensated during the experiment, and the friction force of the experiment is relatively large

Moreover, the plastic strain ranges that the above-mentioned types of experimental fixtures can achieve are relatively small.

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