A sheet material planar strain stretching apparatus and method
By setting a thinning region in the plate specimen and utilizing internal and external constraint structures, the plane strain state control of the plate plane strain tensile device was realized, solving the problem of plate stress deviation in the prior art and ensuring strain consistency and experimental accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HARBIN INST OF TECH
- Filing Date
- 2026-06-02
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot achieve a strictly plane strain state for plates, especially in wide plate tensile methods, where the stress state at both ends of the plate specimen deviates from the plane strain deformation state.
Design a plane strain tensile device for plate, including a specimen body and an internal constraint structure. A thinning region is set in the middle of the specimen body, and the deformation of the inner and outer surfaces of the specimen body is restricted by the inner and outer constraint structures to ensure that the deformation of the plane region perpendicular to the tensile direction is 0. The strain is collected by a strain acquisition system.
Strict control of the plane strain state of the plate was achieved, with consistent strain on both the inner and outer surfaces, avoiding stress deviation and ensuring the accuracy of the plane strain experiment.
Smart Images
Figure CN122409310A_ABST