摘要
针对复合材料滑橇式起落架,设计落震平台试验系统,并进行落震试验。基于ABAQUS/Explict分析模块,二次开发定义材料用户子程序VUMAT,引入损伤判据以及材料刚度折减方案,建立复合材料滑橇式起落架的渐进损伤分析方法,数值结果与试验结果吻合较好,验证了模型的有效性。结果表明:复合材料滑橇式起落架在落震过程中,机身与滑橇连接处和复合材料铺层变厚度区域应力应变偏高。在工况二下,复合材料滑橇式起落架在着陆之后,抱箍连接处会产生一定的基体损伤。
Composite materials have good mechanical properties and have been widely used in aviation field.Compared with the traditional metal landing gear,the composite skid landing gear has the advantages of light weight,corrosion resistance and designability.In order to ensure the safety of composite landing gear in use,it is necessary to study the mechanical properties of composite landing gear.For composite skid landing gear,a falling platform test system is designed and tested.Based on ABAQUS/Explict analysis module,the material user subroutine VUMAT is redeveloped and defined,damage criterion and material stiffness reduction scheme are introduced,and a progressive damage analysis method for composite skid landing gear is established.The numerical results agree well with the test results,which verifies the validity of the model.The results show that the stress and strain of the fuselage-skid connection and the variable thickness area of the composite layers are higher during the falling of the composite skid landing gear.In conditionⅡ,composite skid landing gear may cause certain matrix damage at the clamp connection after landing.
作者
吴玉根
毛春见
周忠斌
钟茂平
WU Yu-gen;MAO Chun-jian;ZHOU Zhong-bin;ZHONG Mao-ping(State Key Laboratory of Mechanics and Control for Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Shanghai Aircraft Design and Research Institute,Commercial Aircraft Corporation of China,Ltd.,Shanghai 201210,China;Jiangxi Hongdu Aviation Industry Co.,Ltd.,Nanchang 330024,China)
出处
《复合材料科学与工程》
CAS
北大核心
2021年第7期68-75,共8页
Composites Science and Engineering
基金
江苏省自然科学基金资助项目(BK20160786)
江苏省优势学科建设工程资助项目(PAPD)。
关键词
复合材料
滑橇式起落架
落震试验
显式动力学
渐进损伤
composite material
skid landing gear
drop test
explicit dynamics
progressive damage
作者简介
吴玉根(1996-),男,硕士研究生,主要研究方向为复合材料数值分析。;通讯作者:毛春见(1983-),男,博士,讲师,主要从事复合材料结构损伤容限/耐久性等领域科研工作,nuaamaoteam@163.com。
