Multi-strain path test fixture and test system provided with same

Abstract

The invention discloses a multi-strain path test fixture and a test system provided with the same and belongs to the field of material mechanical testing machines. The multi-strain path test fixture comprises a lower die holder and an upper die holder, a guide post is arranged on the lower die holder, a guide sleeve which is used for connecting the guide post is arranged on the upper die holder, left-and-right-position-adjustable lower positioning plate and upper positioning plate are arranged on the lower die holder and the upper die holder respectively, and a test piece is fixed between the lower positioning plate and the upper positioning plate; a first one-quarter circular ring transparent hole and a second one-quarter circular ring transparent hole are formed in the lower positioning plate and the upper positioning plate, a first through hole is formed in the position, located in the center of the first one-quarter circular ring transparent hole, of the lower positioning plate, and a plurality of first positioning holes are formed in the arc-shaped edge, located on the outside of the first one-quarter circular ring transparent hole, of the lower positioning plate; the upper side and the lower side of the test piece are fixed on the lower positioning plate and the upper positioning plate by a lower positioning cushion plate and an upper positioning cushion plate respectively. According to the multi-strain path test fixture and the test system provided with the same, strain paths can be changed for multiple times, and loading can be performed for multiple times.

Description

technical field [0001] The invention relates to the field of material mechanics testing machines, in particular to a multi-strain path test fixture and a test system with the fixture. Background technique [0002] The development direction of the material testing machine itself is from the sample preparation test to the product (ie finished product, semi-finished product) test, which requires the corresponding fixture to be used for the finished product test instead of the original standard sample test fixture. fixture development. The traditional fixture itself is only used as a locking mechanism, and its design only plays the role of positioning, clamping, guiding, etc. For different specimens and different experimental force levels, the structure of the fixture is very different, and most of them only have a single load path. [0003] Due to the anisotropy of the material, it is necessary to characterize the mechanical properties of the material under different strain p...

AI Technical Summary

Problems solved by technology

However, this type of fixture is more expensive than ordinary fixtures, and it is only suitable for testing or testing large quantities of similar samples or finished products. Also, if you want to change the strain path, you can only complete it by adjusting the angular position of the specimen, which requires a lot of manpower. Complete large-scale detection, low detection efficiency and poor flexibility

[0005] The applicant's prior patent application document No. 2016103695868 discloses a new type of butterfly wing mechanical analysis specimen fixture and tensile test system, which provides a test fixture that can change the strain path, but the test fixture can only be used for single When the specimen is loaded and deformed, it cannot be loaded again due to the limitations of the test fixture

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