[薄壁管挤压缩径成形过程的模拟研究]丁永祥

【薄壁管挤压缩径成形过程的模拟研究】丁永祥.pdf

SIMULATIVERESEARCHONTHE EXTRUSION-SINKINGOFTHIN-WALLEDTUBE by DingYongxiang supervisedbyprofessorsXiaoJingrongandXiaJuchen Adissertation submittedtotheacademiccommitteeof HuazhongUniversity of Science and Technology inpartialsatisfactionoftherequirementsfor theDegreeofDoctorofPhilosophy in PlasticMeAbstract Todate,the traditional technological process composed of welding andparingis great-lyuscd toproduce theautomobiletransmission shaftpipesin thefieldoftheautomobile industry.Notonly this process is inefficient and the cost ishigh,but also the main perform-ance parameters do not attain the t4泛函表达式的离散化 4模具与工件接触面上摩擦的处理 4求解整体刚度方程 4数值积分的应用 4应力应变场及挤压力的计算 第五章刚塑性有限元法中难点问题的处理 5网格晴变判断准则5新旧网格系统之间的场量传递过程.5触模与脱模的判据 5ICCG算法的迭代格式 5ICCG算法的索引存贮数据结构.第六章有限元网格自动生成算法的研究 6有限元网格自动生成算法的分类和比较 6.