Simulation of crack propagation in HTPB propellant using cohesive zone model
Simulation of crack propagation in HTPB propellant using cohesive zone model
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DOI：
10.1016/j.engfailanal.2012.05.025
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发表时间：
2012-12-01
影响因子：
4
通讯作者：
Zhou, Changsheng
中科院分区：
文献类型：
--
作者：
Han, Bo;Ju, Yutao;Zhou, Changsheng
丁羟推进剂药柱裂纹严重影响火箭发动机的正常工作。为了准确模拟推进剂中裂纹的扩展过程，采用幂律速率无关的内聚区模型（CZM）进行有限元模拟。通过实验和反演/识别方法确定内聚参数。混合模式断裂模拟表明，它的能力来预测裂纹轨迹。采用速率相关的CZM模型分析了丁羟推进剂裂纹扩展过程中的速率效应，模拟得到的载荷-位移曲线与实验数据吻合较好。(C)2012爱思唯尔有限公司保留所有权利。
A crack in HTPB propellant grain can have a significant effect on the normal work of a rocket motor. In order to accurately simulate the crack propagation in propellant, a power law rate-independent cohesive zone model (CZM) is employed in a finite element simulation. Cohesive parameters are determined by experiments and an inverse/identification method. Its capability to predict the crack trajectory is demonstrated by a mixed mode fracture simulation. A rate-dependent CZM is presented to analyze the rate effects during the crack propagation of HTPB propellant, and the simulated load displacement curves agree with the experimental data. (C) 2012 Elsevier Ltd. All rights reserved.