1. Compression deformation behaviors of sheet metals at various clearances and side forces
- Author
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Xianxian Wang, Mei Zhan, He Yang, and Jian Cao
- Subjects
business.product_category ,Bending (metalworking) ,Chemistry ,Mechanical engineering ,Radius ,Deformation (meteorology) ,Compression (physics) ,Finite element method ,Buckling ,lcsh:TA1-2040 ,visual_art ,visual_art.visual_art_medium ,Die (manufacturing) ,Composite material ,Sheet metal ,business ,lcsh:Engineering (General). Civil engineering (General) - Abstract
Modeling sheet metal forming operations requires understanding of plastic behaviors of sheet metals along non-proportional strain paths. The plastic behavior under reversed uniaxial loading is of particular interest because of its simplicity of interpretation and its application to material elements drawn over a die radius and underwent repeated bending. However, the attainable strain is limited by failures, such as buckling and in-plane deformation, dependent on clearances and side forces. In this study, a finite element (FE) model was established for the compression process of sheet specimens, to probe the deformation behavior. The results show that: With the decrease of the clearance from a very large value to a very small value, four defects modes, including plastic t-buckling, micro-bending, w-buckling, and in-plane compression deformation will occur. With the increase of the side force from a very small value to a very large value, plastic t-buckling, w-buckling, uniform deformation, and in-plane compression will occur. The difference in deformation behaviors under these two parameters indicates that the successful compression process without failures for sheet specimens only can be carried out under a reasonable side force.
- Published
- 2015