Analysis and modeling of the strength, life and reliability of an automobile component

The elasto-plastie stress/strain behavior of an automobile rear axle was analyzed by three-dimension finite element method. Based on the stress in critical area where fatigue crack appears, the fatigue life of the welded structure was predicted using the critical shear stress plane criterion. To improve the fatigue property of the rear-axle, the welding-seam was strengthened by both pellet spraying and plasma melting, and evident improvement was experimentally illustrated. Based on the viewpoint that a complex component is also a system in the respect of reliability assessment and statistical dependence among component failures （ i. e. the so call ＂common cause failure＂） is inherent for system under stochastic load environment, a system-level load-strength interference model was presented and the reliability of the rear axle was estimated as a system, instead of a component.     

城市降雨径流污染初始冲刷效应对BMPs选择的启示

指出城市降雨径流污染初始冲刷效应(FFE)在城市非点源污染的研究中占有重要地位。综述FFE的判定及大小定量化方法、季节性FFE的概念和污染物的相态对FFE的影响。FFE初中期雨水径流污染物浓度高的特性,为选择经济高效的最佳管理措施(BMPs)提供了理论依据和重要启示。结合FFE及冲刷过程中污染物的形态提出的工程BMPs,能使资源配置和污染控制效果达到最优化,为城市公共管理部门的决策和实践提供建议。     

Cosmos Works 软件在复杂结构梁分析中的应用

介绍了有限元分析软件Cosmos Works,重点介绍了它的快速算法，通过比较可以看出，利用Cosmos Works的快速算法，有限元分析的求解速度可以提高几十倍。     

汽车零件强度、寿命与可靠性分析与模型

The elasto-plastic stress/strain behavior of an automobile rear axle was analyzed by three-dimension finite element method.Based on the stress in critical area where fatigue crack appears,the fatigue life of the welded structure was predicted using the critical shear stress plane criterion.To improve the fatigue property of the rear-axle,the welding-seam was strengthened by both pellet spraying and plasma melting,and evident improvement was experimentally illustrated.Based on the viewpoint that a complex component is also a system in the respect of reliability assessment and statistical dependence among component failures(i.e.the so call"common cause failure")is inherent for system under stochastic load environment,a system-level load-strength interference model was presented and the reliability of the rear axle was estimated as a system,instead of a component.     

钢筋混凝土烟囱温度应力浅析

钢筋混凝土烟囱在使用过程中表面常出现裂缝,有的裂缝宽度大大超过了规范允许的限值,影响正常使用。本文采用有限元仿真软件Ansys对钢筋混凝土烟囱进行温度应力分析,研究筒壁在高温烟气作用下的应力分布规律及其裂缝产生原因,采取预防措施,进一步优化设计。