论文部分内容阅读
作者用材料疲劳破坏的观点,对多冲A-N曲线和多冲抗力进行了分析,对现行方法提出了比较重要的改进建议. 作者认为,现行方法中以昂贵复杂的试件和试验过程,所探求的不同材料的A-N曲线间的相互位置,以及是否存在相交点的问题,是可以根据材料的其它机械性能,如强度极限σ_b、冲击韧度α_k或延伸率δ这些指标来判定的.为此,提出了一种α_k-σ_b图线方法,并以例证说明了α_k-σ_k图线方法的应用.
The author analyzed the multi-blanking AN curve and multi-blanking resistance from the perspective of material fatigue failure, and put forward some more important suggestions for improving the current method.The author thinks that the current method is based on expensive and complicated specimen and test process, Of the different materials between the AN curve mutual position, and the existence of the intersection point of the problem can be based on other mechanical properties of the material, such as the strength limit σ_b, impact toughness α_k or elongation δ of these indicators to determine To this end, An α_k-σ_b graph line method is presented, and the application of α_k-σ_k graph line method is illustrated.