基于渐进损伤数值模拟的复合材料气瓶爆破压强优化  

OPTIMIZATION OF COMPOSITE CYLINDER BURST PRESSURE BASED ON PROGRESSIVE DAMAGE NUMERICAL SIMULATION

作　　者：贾子璇 林松 贾晓龙[1] 杨小平[1] JIA Zi-xuan;LIN Song;JIA Xiao-long;YANG Xiao-ping(College of Material,Beijing University of Chemical Technology,Beijing 100029,China;College of Material Engineering,North China Institute of Aerospace Engineering,Langfang 065000,China)

机构地区：[1]北京化工大学材料学院,北京100029 [2]北华航天工业学院材料科学与工程学院,廊坊065000

出　　处：《复合材料科学与工程》2020年第8期25-31,共7页Composites Science and Engineering

基　　金：陕西省重点研发计划项目(2019TSLGY04-03)。

摘　　要：本文针对金属内衬复合材料气瓶进行渐进损伤的数值模拟并根据不同铺层方案气瓶的爆破结果进行优化选择。在ABAQUS软件中建立了气瓶模型,选用Hashin失效准则和Tan退化模型提出了渐进损伤理论,通过编写USDFLD子程序实现对复合材料模型渐进损伤的预测过程,并使用NOL环验证了损伤理论的准确性;对不同铺层方式的气瓶分别进行爆破结果的预测和渐进损伤分析。NOL环拉伸破坏结果表明,模拟得到的破坏应力与实际值的误差为1.9%,证明了渐进损伤理论用于环形缠绕模型是可行的。气瓶的爆破预测结果表明,预测的压力和失效位置与真实试验结果很接近。不同铺层的气瓶的爆破结果比较表明,铺层角度和数量对气瓶爆破压力及位置有较大影响。气瓶的渐进损伤分析结果表明,复合材料气瓶的损伤是一个从基体开裂逐渐过渡到分层缺陷,最终导致纤维断裂和气瓶爆破的过程。In this paper,the numerical simulation of progressive damage is carried out for the cylinder with metal liner and the optimization is carried out according to the burst results of the cylinder with different layer schemes.The cylinder model was established in ABAQUS software,the Hashin failure criterion and Tan degradation model were selected to put forward the progressive damage theory,and the USDFLD subroutine was written to realize the prediction process of progressive damage of composite model,and the accuracy of the damage theory was verified by NOL ring.The prediction of burst results and progressive damage analysis were carried out for cylinders with different layers modes.The tensile failure results of NOL ring show that the error between the simulated failure stress and the actual value is 1.9%,which proves that the theory of progressive damage is feasible for the circular winding model.The prediction results of cylinder burst show that the predicted pressure and failure position are close to the real test results.The comparison of burst results of cylinders with different layers shows that the angle and number of layers have a great influence on the bursting pressure and position of cylinders.The results of progressive damage analysis show that the damage of composite cylinder is a process from matrix cracking to delamination defect,which consequently leads to fiber fracture and cylinder burst.

关 键 词：复合材料气瓶 数值模拟 渐进损伤分析 

分 类 号：TB332[一般工业技术—材料科学与工程]