受内部冲击弯管的破裂失效研究

喻健良;秦磊

振动与冲击 ›› 2010, Vol. 29 ›› Issue (10) : 228-231.

PDF(1604 KB)
PDF(1604 KB)
振动与冲击 ›› 2010, Vol. 29 ›› Issue (10) : 228-231.
论文

受内部冲击弯管的破裂失效研究

  • 喻健良; 秦磊
作者信息 +

Research on Rupture Failure of Elbow Bend Subjected to Internal Impact

  • Yu Jian-liang; Qin Lei
Author information +
文章历史 +

摘要



受冲击管道的破裂失效研究对压力管道的设计和防护有着重要意义。考虑大变形及应变率对冲击处的影响,基于随动塑性Cowper-Symonds模型,利用ANSYS/LS-DYNA有限元软件结合自主开发的APDL语言建立了内部受半球头弹体横向冲击弯管的模型。分析了受冲击弯管的失效模式及破裂时位移、应变时程曲线,研究了不同厚径比和曲径比下弯管临界破裂动能的变化趋势。结果表明,临界破裂动能随厚径比和曲径比的增加而增加,且厚管破裂时间小于薄管。





Abstract

Study on rupture failure of impacted pipe is of great significance for the design and protection of pressure pipeline. As the influence of large deformation and strain rate on impact position was considered, a model that the elbow bend was impacted by a hemispherical-nosed missile was set up by using ANSYS/DYNA finite element software and the self-developed APDL language based on plastic kinematic Cowper-Symonds hypothesis. The failure mode of impacted elbow bend, time-history of displacement and strain at rupturing were analyzed,meanwhile,the variation tendency of critical rupture kinetic energy under different thickness-diameter ratio and curvature-diameter ratio were researched. Results indicate that critical rupture kinetic energy increases with the increase of thickness-diameter ratio and curvature-diameter ratio, and thick tube rupture time is less than that of thin tube.

关键词

弯管 / 半球头弹体 / 临界破裂速度 / 临界破裂动能

Key words

elbow bend / hemispherical-nosed missile / critical rupture speed / critical rupture kinetic energy

引用本文

导出引用
喻健良;秦磊. 受内部冲击弯管的破裂失效研究[J]. 振动与冲击, 2010, 29(10): 228-231
Yu Jian-liang;Qin Lei. Research on Rupture Failure of Elbow Bend Subjected to Internal Impact[J]. Journal of Vibration and Shock, 2010, 29(10): 228-231

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