Testing device for achieving plane strain state in large-deformation range and data processing method

Abstract

The invention discloses a testing device for achieving a plane strain state in a large-deformation range. The testing device comprises a motor, a support, a pressing plate, a screw rod, a first baffle, a check block, a first laser ranging sensor, a worktable, a second baffle, a second laser ranging sensor, a first pressure sensor, a second pressure sensor and a tested board. The motor is installed on the support and connected with the pressing plate and the screw rod. The pressing plate is provided with the second laser ranging sensor and the first pressure sensor. The baffles are arranged on the two sides of the worktable and are connected with the check block and the worktable through screws. The first laser ranging sensor is arranged in the middle of the check block, and the second pressure sensor is arranged in the middle of the first baffle. The tested board is arranged on the worktable defined by the first baffle, the second baffle and a third baffle. The support is connected to the worktable. A data processing method of the testing device for achieving the plane strain state in the large-deformation range comprises four steps. According to the testing device and the data processing method, experimental bases are provided for some forming technologies, theoretical calculation and infinite element modeling in engineering practice production.

Description

technical field [0001] The invention relates to a test device and a data processing method for realizing a plane strain state in a large deformation range. It is a design of a plane strain test device capable of realizing a larger deformation range than a traditional tensile plane strain test, and provides How to process the test data obtained by using the device to further establish the constitutive relation of the plane strain suitable for a larger deformation range belongs to the field of material mechanics testing technology and equipment. Background technique [0002] Plane strain problem: In the process of material deformation under force, if there is no deformation in a certain direction, or the strain in this direction is always 0, it is the state of plane strain. [0003] At present, due to the rapid development of aviation, shipbuilding, and automobile industries, production technicians often have to face a large number of problems that require metal forming. At th...

AI Technical Summary

Problems solved by technology

At present, people have designed some plane strain test methods, all of which are to achieve the plane strain state by designing a special shape of the test piece and then stretching it. The stress state is close to plane strain, but due to the limitation of the shape of the specimen and the tensile state, the deformation range that can be obtained is very small

However, in the actual forming process, the material can achieve a large deformation under the plane strain state, and the theoretical calculation and finite element simulation of its deformation law require data in a large deformation range, while the deformation range obtained by the traditional plane strain test method Small, difficult to adapt to actual needs

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