• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite structures >Crack nucleation and growth induced by thermal phase transition for polymer bonded energetic composite materials
【24h】

Crack nucleation and growth induced by thermal phase transition for polymer bonded energetic composite materials

机译：Crack nucleation and growth induced by thermal phase transition for polymer bonded energetic composite materials

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

Understanding thermophysical and thermomechanical damage behaviors of polymer-bonded energetic composite materials (PBECMs) is fundamental to the design of advanced safe munition structures. Herein, the effects of thermal expansion and phase transition in energetic crystal, thermal softening of binders, binder-crystal interface debonding, and heating rate on cracking damage in PBECMs are quantitated from the viewpoint of mechanics. An original thermomechanical crystal model integrating with anisotropic thermoelasticity, thermal expansion and phase transition is developed for energetic crystal. Damage and debonding at the interface and intracrystalline fracture are modelled by a bilinear traction-separation cohesive law. The results show that the occurrence of phase transition induces a prominent increase of volume deformation and contributes to mutual compression between crystals and mismatch shear deformation at the interface, thereby multiplying crack density. Inhomogeneous thermal stress field and crack distributions are related to anisotropic thermal expansion and phase transition behaviors of crystals. The predicted thermally cracking behaviors in PBECMs, including critical temperature to crack formation, crack nucleation position and growth mode, are consistent with experimental results.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号