含能材料2024，Vol.32Issue(4)：397-407,11.DOI:10.11943/CJEM2023209
浇注PBX替代材料的准静态压缩力学行为及本构模型标定
Quasi-static Compression Mechanical Behavior and Constitutive Model Calibration of Casting PBX Substitute Materials
李思涵 1王克俭 1牛余雷 2黄翰哲 1马梓煜1
作者信息
- 1. 北京化工大学机电工程学院,北京 100029
- 2. 西安近代化学研究所,陕西 西安 710065
- 折叠
摘要
Abstract
In order to study the quasi-static compression behavior of polymer bonded explosive(PBX),the uniaxial quasi-static compression tests were carried out on two typical PBX substitute materials(with and without aluminum powder)at different strain rates,and their mechanical properties were compared and analyzed.Based on the Zu-Wang-Tang(ZWT)model,a new model was proposed to describe the quasi-static compression behavior of materials.The constitutive model parameters were ob-tained by genetic algorithm,and the model was developed by using Fortran language in the User Material(UMAT)subroutine interface of Abaqus finite element analysis software.Results show that the quasi-static compression process of casting PBX substi-tute materials can be divided into three stages:elastic compression,stress decay and instability failure.The mechanical behavior of quasi-static compression is obviously correlated with the strain rate.With the increase of the strain rate,the effective compres-sive strain of the material is basically unchanged,while the logarithms of compression modulus,yield strength and compressive strength are linearly related to the logarithm of strain rate.The addition of aluminum powder can improve the compression modu-lus,yield strength and compression strength of casting PBX substitute materials.The newly constructed constitutive model can better describe the quasi-static compression behavior of casted PBX substitute materials,and its universality is validated by the fi-nite element analysis software.The coefficients of determination(R2)between the simulated and experimental results are higher than 0.98,indicating a high level of consistency.关键词
浇注高聚物粘结炸药(PBX)替代材料/准静态压缩/本构模型/UMATKey words
casting polymer bonded explosive(PBX)substitute materials/quasi-static compression/constitutive model/UMAT分类
军事科技引用本文复制引用
李思涵,王克俭,牛余雷,黄翰哲,马梓煜..浇注PBX替代材料的准静态压缩力学行为及本构模型标定[J].含能材料,2024,32(4):397-407,11.
