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用有限元方法设计BJ型等速万向节外套预成形件* 总被引:2,自引:1,他引:2
用有限元方法优选等速万向节外套缩径工序的预成形件的形状和尺寸,并给出了预成形件的变形过程图。用工艺试验验证了有限元计算结果的正确性。同时作出了不同车型外套的预成形件关键尺寸参考曲线。 相似文献
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MA Linwei MO Jianhua 《机械工程学报(英文版)》2008,21(1):31-35
Single-point incremental forming (SPIF) is an innovational sheet metal forming method without dedicated dies, which belongs to rapid prototyping technology. In generalizing the SPIF of sheet metal, the deformation analysis on forming process becomes an important and useful method for the planning of shell products, the choice of material, the design of the forming process and the planning of the forming tool. Using solid brick elements, the finite element method(FEM) model of truncated pyramid was established. Based on the theory of anisotropy and assumed strain formulation, the SPIF processes with different parameters were simulated. The resulted comparison between the simulations and the experiments shows that the FEM model is feasible and effective. Then, according to the simulated forming process, the deformation pattern of SPIF can be summarized as the combination of plane-stretching deformation and bending deformation. And the study about the process parameters' impact on deformation shows that the process parameter of interlayer spacing is a dominant factor on the deformation. Decreasing interlayer spacing, the strain of one step decreases and the formability of blank will be improved. With bigger interlayer spacing, the plastic deformation zone increases and the forming force will be bigger. 相似文献
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SHAPEOPTIMIZATIONDESIGNOFCRUSHTOOTHUSINGFINITEELEMENTMETHODGongKaijun;YangQingfu;ZhangJunxia(TaiyuanUniversityofTechnology)Zh... 相似文献
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轴对称体热弹塑性蠕变有限元分析计算 总被引:1,自引:0,他引:1
以经典的热弹塑性蠕变理论为基础,考虑到材料常数随温度的变化,导出了热弹塑性蠕变问题的增量本构方程和轴对称有限元计算公式,编制了程序,并以高温炉管为例作了应力、应变计算,结果可供工程设计部门参考。 相似文献
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0 INTRODUCTIONMetal foeing is a main industrial process for manufacturing workpieces with high strength. Alongwilh increasing standwh of qUality reqUired by people, it is neeessap that the process should beunderstood Perfectly and controlled correctly. However, during hot forming process, microstructurechanges in the material occurred decisively ialluence the mechanical properties of the final pIDduct, in themeantime, the ndcrostructure changes also affect the forming p~ess itself, since… 相似文献
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对电动振动台试验仿真技术进行探讨,包括电动振动台有限元模型的建立、边界条件的模拟、驱动力的模拟与施加、试验条件的仿真等.然后以某电动振动台为例,建立并修正能反映其本身动态特性的有限元模型,在此基础上采用有限元法对某试件的振动台试验进行仿真计算,并与试件真实振动台试验进行对比研究.结果表明,仿真计算结果对试件在共振峰频段的动态响应提供较好的预测,在高频非共振峰频段,仿真结果与试验结果有所差异,分析差异产生的可能原因. 相似文献
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蹄-鼓式制动器热弹性耦合有限元分析 总被引:18,自引:1,他引:18
首先探讨蹄—鼓式汽车制动器的摩擦接触热弹性耦合非线性动力学问题及其分析方法,包括摩擦生热模型、多物理场中的弹性体有限元模型、接触问题模型的建立方法以及相应的数值分析方法。然后,利用有限元分析软件ADI-NA建立一种新型蹄—鼓式制动器热弹性耦合动力学分析的三维有限元模型,确定对模型求解的位移边界条件和热边界条件,设定材料物性参数、加载过程及模拟工况,探讨进行制动器热弹性耦合有限元分析的过程,通过仿真计算得到制动器工作过程中摩擦副间接触力分布、制动鼓瞬态温度场、应力场、变形场等重要信息。 相似文献
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