CHINESE JOURNAL OF ENERGETIC MATERIALS
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高聚物粘结炸药蠕变行为的近场动力学模拟方法
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(中国工程物理研究院总体工程研究所, 四川 绵阳 621999)

作者简介:

李潘(1988-),女,博士研究生,主要从事PBX的本构和损伤破坏研究。e-mail: lipan263646@163.com 通信联系人: 郝志明(1965-),男,研究员,主要从事计算固体力学研究。e-mail: haozm@caep.cn

通讯作者:

郝志明(1965-),男,研究员,主要从事计算固体力学研究。e-mail: haozm@caep.cn

基金项目:

国家自然科学基金(11472257)和中国工程物理研究院重点学科项目(计算固体力学)


Application of Peridynamic Method on Prediction of Creep Behavior of Polymer Bonded Explosives
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(Institute of Systems Engineering, CAEP, Mianyang 621999, China)

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    摘要:

    近场动力学是一种新的无网格方法, 发展了其对材料粘弹性力学行为的分析能力。采用Burgers粘弹性模型, 结合非线性粘弹体的时间-应力等效原理, 推导出非线性粘弹体在不同应力下的蠕变柔度的表达式和近场动力学蠕变本构力函数, 建立起可应用于高聚物粘结炸药的近场动力学蠕变模拟方法。模拟了PBX9502的蠕变行为, 并通过实验验证。建立的方法可用于高聚物粘结炸药在温度和应力共同作用下的蠕变行为分析。

    Abstract:

    Peridynamics is a recently developed meshfree method with many aspects needing to be further studied, such as viscoelasticity, plasticity and the coupling of elasticity, plasticity and viscosity. The analytical ability for considering viscoelastic behavior of peridynamics is developed. The theoretical basis, modeling procedure and numerical scheme of peridynamics are first reviewed. Then the expressions of creep compliance under different stresses and the peridynamic creep response functions are deduced combing time-stress equivalence principle of nonlinear viscoelastic materials and utilizing Burgers viscoelastic model. In this manner, the peridynamic creep simulation method which can be applied to polymer bonded explosives is established. The creep behavior of PBX9502 is then simulated using this method, which indicates a good conformity with experiment results. The established method can be applied to analyze creep behavior of polymer bonded explosives under different temperatures and different stresses.

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引用本文

李潘,郝志明,刘永平,等.高聚物粘结炸药蠕变行为的近场动力学模拟方法[J].含能材料, 2017, 25(2):118-124. DOI:10.11943/j. issn.1006-9941.2017.02.005.
LI Pan, HAO Zhi-ming, LIU Yong-ping, et al. Application of Peridynamic Method on Prediction of Creep Behavior of Polymer Bonded Explosives[J]. Chinese Journal of Energetic Materials, 2017, 25(2):118-124. DOI:10.11943/j. issn.1006-9941.2017.02.005.

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历史
  • 收稿日期: 2016-05-13
  • 最后修改日期: 2016-08-28
  • 录用日期: 2016-09-26
  • 在线发布日期: 2017-02-27
  • 出版日期: 2017-02-27