【摘要】 对带有哑铃状扁平形试件的杆杆型冲击拉伸试验系统 ,建立了含有多个物理和几何间断面 (包括内部交界面 )的三维弹塑性有限元模型 ,采用动态增量非线性有限元程序 ADINA对该模型进行了数值分析。在弹塑性框架内初步论证了杆杆型冲击拉伸试验装置一维测试原理有效性及其近似成立的条件 ,并与文献 [1 ]进行了比较。更多还原

【Abstract】 In relation to reference [1], a three dimensional finite element model for the SHTB is established to simulate the Bar Bar Tensile Impact Testing Apparatus with a Flat Specimen. Using the finite element program ADINA, the first comprehensive 3 D numerical solution for the model is obtained. Numerical simulations indicate that, so long as certain conditions be satisfied, the 1 D experimental principle adopted in analyzing the experimental data can be confirmed. These conditions make it necessary to appropriately select the geometry of the specimen. Compared with the simulational experimental results for the SHTB with a dumbbell like cylindrical specimen, this SHTB with a dumbbell like flat specimen is more reliable and reasonable.更多还原