Transactions of Materials and Heat Treatment

Title：Research on plastic locking process of interlock-type soft waveguide based on size effects

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ClassificationCode：TG306

year,vol(issue):pagenumber：2020,45(4):100-107

Abstract：

In order to solve the product scrap problem caused by the connection broken of a certain type of interlock-type soft waveguide in the plastic locking process，in the case of other factors were excluded, the influence of size effects of waveguide material on the deformation process in the forming process of soft waveguide was studied. Based on the tensile test data of H70 brass material, the influences of different size effect coefficients on yield strength and tangent modulus were obtained, and the bilinear elastic-plastic constitutive relation was modified. The elastic-plastic constitutive model which can reflect the size effects was established. Finite element numerical method was used to simulate the plastic locking process. The effect of material size effect coefficient on the locking process was confirmed. Finally, according to the experiment, the effect of locking is verified, and the problem of locking damage is solved. The results show that it is necessary to select and prepare materials according to the size effect coefficient.

Funds：

教育部协同育人项目（201802204005）

鲍成伟(1989-)，男，硕士，实验师 E-mail：baocw@npumd.edu.cn

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