回弹二世

LS-DYNA隐式车间问题# 8:回弹使用DYNAIN文件目的*学习生成DYNAIN仿真输出文件的末尾。*学会应用人工稳定在一个多步骤的回弹模拟。问题描述这个练习涉及两个模拟。首先,悬臂板壳元素使用动态显式加载模拟。创建一个输出文件名为dynain最后的模拟。第二个,然后执行隐式模拟读取dynain文件和计算回弹变形。输入文件名:cant_dynain_load。k, cant_dynain_springback。k程序将输入文件复制到你的本地目录。使用一个编辑,查看第一个输入文件,回答下列问题:1。用于创建DYNAIN文件关键字是什么? 2. What material model is used? Run the first simulation, and postprocess the results. 3. What is the initial Y-coordinate for all nodes? 4. What is the maximum effective stress at the end of the loading? View the contents of the DYNAIN file which was created at the end of the first run. 5. Which keywords are used in the DYNAIN file? View the contents of the second input file, and answer the following: 6. Could this file be easily created from the first input file? How? 7. How many steps will be used in this simulation? 8. How is load applied in this simulation? Run the second input file, making sure the DYNAIN file produced by the first run is available for *INCLUDEing, and postprocess the results. 9. Is the termination time reached? Why? Activate automatic time step control and artificial stabilization, and repeat the simulation. Postprocess the results, and plot the Y-coordinate of a tip node vs. time. 10. Does the springback deflection occur uniformly, or abruptly? 11. After springback: max. effective stress = max. Y-coordinate = Modify the artificial stabilization scale factor to SCALE = 0.050, and repeat the springback simulation. Postprocess, and plot the Y-coordinate of the tip node again. 12. How has the evolution of springback deflection changed? 13. After springback: max. effective stress = max. Y-coordinate = Modify the nonlinear convergence test to compare the displacement increment to the total displacement over the current step (DNORM=1), repeat the simulation, and postprocess. 14. After springback: max. effective stress = max. Y-coordinate =

* BOUNDARY_SPC_NODE * CONTROL_IMPLICIT_AUTO * CONTROL_IMPLICIT_GENERAL * CONTROL_IMPLICIT_SOLUTION * CONTROL_IMPLICIT_STABILIZATION * CONTROL_TERMINATION * DATABASE_BINARY_D3PLOT * DEFINE_CURVE * *包括* INTERFACE_SPRINGBACK_LSDYNA *关键字结束* LOAD_NODE_POINT * MAT_ELASTIC * * SECTION_SHELL * SET_PART_LIST *部分标题

标题$ * *关键字回弹弹性悬臂壳带$ $ - - - - - - - - - - - - - - - - $ *包括dynain $ $ - - - - - - - - - - - - - - - - * CONTROL_IMPLICIT_GENERAL imflag美元dt0离子交换1 0.2500 0 * CONTROL_IMPLICIT_SOLUTION nlsolvr美元ilimit maxref dctol ectol rctol lstol 0 0 0 0.00 0.00 0 0美元dnorm divflag inistif nlprint 0 0 0 0美元1 0 0 0 * CONTROL_IMPLICIT_AUTO iauto美元iteopt itewin dtmin dtmax 0 0 0 0.00 0.00 - 1 0 0 0 * CONTROL_IMPLICIT_STABILIZATION ias美元规模tstart往往0 0.0 0 0 1美元0.00 0 0 $ $ - - - - - - - - - - - - - - - - * * DATABASE_BINARY_D3PLOT (CONTROL_TERMINATION 1.00美元0.01美元美元- - - - - - - - - - - - - - - - * MAT_ELASTIC 1美元7.000 e-04 3.000 e + 07年3.000 e-01 * SECTION_SHELL 1 16 0 2美元1.000 1.000 1.000 1.000 e-01 e-01 e-01 e-01 0.000 e + 00美元*悬臂壳部分结束1 1 1 0 0 0 0 0 * $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ 2号文件$ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ $ * *关键字标题悬臂壳带w /结束力$ $ - - - - - - - - - - - - - - - - * INTERFACE_SPRINGBACK_LSDYNA psid 7美元* SET_PART_LIST psid 7美元$ pid 1 $ $ - - - - - - - - - - - - - - - - * * DATABASE_BINARY_D3PLOT (CONTROL_TERMINATION 0.050美元0.001美元美元- - - - - - - - - - - - - - - - * MAT_ELASTIC 1美元7.000 e-04 3.000 e + 07年3.000 e-01 * SECTION_SHELL 1 16 0 2 1.000 0.000 1.000 1.000 1.000 e-01 e-01 e-01 e-01 e + 00 *部分悬臂壳1 1 1 $ $ - - - - - - - - - - - - - - - - * LOAD_NODE_POINT nsid景深lcid科幻16美元98 0.5 32 2 1.0 48 98 0.5 98 * 98 (DEFINE_CURVE 0.000, 0.0 - 0.050, 50.0 - 1.000, 50.0美元* BOUNDARY_SPC_NODE cid美元国家免疫日dxdy dz rx ry rz 17 1 0 1 1 1 1 1 1 0 1 1 1 1 1 1 0 1 1 1 1 1 1 $ $ 33 - - - - - - - - - - - - - - - - $ *结束

• cant_dynain.tar
• cant_dynain.zip