刘贺,鄂大辛.1Cr18Ni9Ti 不锈钢管滞后回弹的黏弹塑性建模和有限元模拟[J].精密成形工程,2015,7(6):65-69.
LIU He,E Da-xin.Modeling and Fenite-element Simulation of Time-dependent Springback of 1Cr18Ni9Ti Stainless Steel Tubes Based on Elasto-viscoplasticity[J].Journal of Netshape Forming Engineering,2015,7(6):65-69. |
| 1Cr18Ni9Ti 不锈钢管滞后回弹的黏弹塑性建模和有限元模拟 |
| Modeling and Fenite-element Simulation of Time-dependent Springback of 1Cr18Ni9Ti Stainless Steel Tubes Based on Elasto-viscoplasticity |
| 投稿时间：2015-09-18 修订日期：2015-11-10 |
| DOI：10.3969/j.issn.1674-6457.2015.06.010 |
| 中文关键词: 1Cr18Ni9Ti 管 滞后回弹 双耗散黏弹塑性模型 有限元模拟 |
| 英文关键词: 1Cr18Ni9Ti tube time-dependent springback two-layer viscoplasticity model finite-element simulation |
| 基金项目:国家自然科学基金(51175044) |
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| 中文摘要: |
| 目的 研究 1Cr18Ni9Ti 不锈钢管在单轴拉伸和回转牵引弯曲卸载后的滞后回弹现象,利用有限元软件进行滞后回弹结果的预测。 方法 通过系列单轴拉伸和应力松弛试验得到 1Cr18Ni9Ti不锈钢管黏弹塑性材料参数,采用双耗散黏弹塑性材料模型在有限元 ABAQUS 软件进行拉伸和回转弯曲卸载后滞后回弹的模拟预测,并与试验结果对比。 结果 利用该黏弹塑性材料模型预测得到的滞后回弹变化趋势与试验值吻合较好,数值上接近试验值。 结论 基于双耗散黏弹塑性材料模型进行滞后回弹的建模,在瞬时回弹后,弹塑性组合单元和黏弹性组合单元中存在相反的残余应力,从而驱动材料持续发生黏弹性变形,可能是产生滞后回弹的原因。 有限元分析中考虑了加载过程中的黏性响应,其预测结果更加接近实际。 |
| 英文摘要: |
| To investigate the time-dependent springbackof 1Cr18Ni9Ti stainless steel tubes under tension and rotary bending, and to predict it by FEM. The two-layer viscoplasticity model whichis available in the finite-element analysis software ABAQUS is applied. Parameters of this model are obtained based on the results of a series of uniaxial tension and stress relaxation tests carried out at different strain rates. The time-dependent springbackquantitiesof tubes are simulated by ABAQUS based on thiselasto-viscoplasticity model. It's revealed that simulated time-dependentspringbacklaw and quantities are close to the experimental data. Basedon thiselasto-viscoplasticity material model, it seems that the reverse residual stress appeared in the elastic-plastic network and visco-elastic network caused the time-dependent springback. Thenumericalresults are in good agreement with experimental results with this model by taking account of the viscous behaviors in the forming process. |
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