塑性应变比r值的测定和应用
MEASUREMENT AND APPLICATION OF PLASTIC STRAIN RATIO r-VALUES
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摘要: 塑性应变比r值已作为评价汽车专用薄板成形性的一个重要参数。通过对试样尺寸及不同变形量的测试和r值对冲压件开裂率影响的研究分析, 说明r值对汽车专用薄板的冲压生产有重大的指导意义。Abstract: Plastic strain ratio r-values has been applied as one important parameter to describe the forming property of sheet specifically used for Automobile. This paper, after the measurement of samples dimensions and various deformation parameters, and the study of the influence of r-value to stamping craze rate of punched parts, shows that r-value significantly guides the production of sheets specially used for automobile.