球团压制机辊轴在循环弹塑性变形时的应变

The Strain Study on the Roller of Pellet Presses under the Cyclic Elastic-plastic Deformation

论述了循环变形下的球团压制机辊轴类重型荷载零件，不应采用一次变形下的设计计算方法，而应采用循环变形下的弹塑性分析的方法解决其应变强度问题；分析了弹塑性变形问题的理论和计算步骤；作出了Jsu、Jsf。值与广义最大应变τ＊maxR值之间的关系表和不同的应变区间τn＊内Jnn和Jnn值与τ＊maxR值的关系表，以供工程技术人员实际计算时查找方便；另做出了常用轴料45#铜的广义弯矩M＊u、Mv＊、M＊及广义偏角ψ值与τ＊maxR值之间的关系曲线;并通过试验数据验证了这些曲线的正确性。

The strain strength under cyclic deformation of heavy loaded roller-parts used in pellet press is discussed. The calculation of strain strength should not use the first deformation, but the cyclic deformation of elastic-plastic analysis method should be used to solve this problem. This paper analyzed the theory of elastic-plastic deformation and calculation steps, so the table of the relationship among the values of jsu、Jse and τn＊ the value of generalized maximun strain is made τmax R and also the relationship table of Jnu,Jnv, and τ＊max with in different strain ranges τn＊. The table makes the caleulation easier for engineers and technicians. This paper also plots the relationship curves among the generalized moment Mu＊ ,Mv＊ ,M＊ , generalized angle ψ and τ＊max R for steed 45# and 40Cr. The curves are proved by experiments.