基于损伤演化的杆件断裂模拟方法及其应用

丁 阳;葛金刚

振动与冲击 ›› 2013, Vol. 32 ›› Issue (2) : 67-70.

PDF(1665 KB)
PDF(1665 KB)
振动与冲击 ›› 2013, Vol. 32 ›› Issue (2) : 67-70.
论文

基于损伤演化的杆件断裂模拟方法及其应用

  • 丁 阳,葛金刚
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Simulation Method and Application of Member Fracture Based on Damage Evolution

  • DING Yang, GE Jin-gang
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文章历史 +

摘要

建立了钢材的弹塑性损伤本构模型,将其与有限单元法中分段纤维梁模型结合,实现了杆件不同位置损伤程度评估,根据评估结果实时修正杆件特性,建立了杆件断裂数值模拟方法。将所建立的杆件断裂模拟方法应用于单调递增荷载作用下的梁系结构和地震作用下的单层网壳结构,结果表明,所建立方法可有效地模拟杆件断裂;杆件断裂突然,与其相连的节点位移及杆件应变能突增,可能导致与其相连杆件破坏;强震作用下单层网壳结构可能发生杆件断裂,导致结构局部刚度降低,引起结构倒塌破坏。

Abstract

Considering damage evolution, elastic-plastic constitutive program is compiled and applied to segmentation fiber beam to evaluate the damage situation at different position of member. Based on damage value, simulation method of member fracture is established by modifying member characteristics in real time. Then the simulation method of member fracture is applied to the beam structure under monotone increasing load and the single-layer reticulated shell under earthquake. The analysis results show that the simulation method is able to simulate member fracture effectively; since member fracture suddenly, node displacement and strain energy of members connected to the fractured member would increase suddenly, it would result in members’ failure; member fracture could be occurred in single-layer reticulated shell under strong earthquake, then it can decrease the structure stiffness and results in structural collapse.

关键词

杆件断裂 / 数值模拟 / 损伤演化 / 纤维梁模型 / 节点位移 / 应变能

Key words

member fracture / numerical simulation / damage evolution / fiber beam / node displacement / strain energy

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导出引用
丁 阳;葛金刚. 基于损伤演化的杆件断裂模拟方法及其应用 [J]. 振动与冲击, 2013, 32(2): 67-70
DING Yang;GE Jin-gang. Simulation Method and Application of Member Fracture Based on Damage Evolution[J]. Journal of Vibration and Shock, 2013, 32(2): 67-70

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