功能梯度石墨烯增强复合材料拱在脉冲荷载下的动力屈曲分析  

DYNAMIC BUCKLING OF FUNCTIONALLY GRADED GRAPHENE NANOPLATELETS REINFORCED COMPOSITE ARCHES UNDER PULSE LOAD

作　　者：陈碧静 黄永辉[1] 杨智诚 刘爱荣[1] CHEN Bi-jing;HUANG Yong-hui;YANG Zhi-cheng;LIU Ai-rong(Research Center for Wind Engineering and Engineering Vibration,Guangzhou University,Guangzhou,Guangdong 510006,China;College of Urban and Rural Construction,Zhongkai University of Agriculture and Engineering,Guangzhou,Guangdong 510225,China)

机构地区：[1]广州大学风工程与工程振动研究中心,广东广州510006 [2]仲恺农业工程学院城乡建设学院,广东广州510225

出　　处：《工程力学》2022年第S01期370-376,共7页Engineering Mechanics

基　　金：国家自然科学基金面上项目(11972123,51878188);高等学校学科创新引智计划(111计划D21021)。

摘　　要：采用有限元方法分析了矩形脉冲荷载作用下功能梯度石墨烯增强复合材料拱的动态力学响应,提出了通过参考比较拱静态屈曲路径和拱动态位移响应峰值来判断拱动力屈曲荷载和临界时间的方法。在此基础上,通过参数研究,详细分析了GPLs分布模式、质量分数、形状尺寸及荷载持续时间对拱动态响应的影响。结果表明:很少掺量的GPLs即可显著提高拱的动力屈曲荷载,X型GPLs分布模式对拱动力稳定性的增强效果最好,在其他参数不变的情况下,表面积越大且厚度越薄的GPLs的增强效果越明显。By using finite element method,the dynamic response of functionally graded graphene nanoplatelets reinforced composite(FG-GPLRC)arches under radial rectangular pulse loading was analyzed.A method is proposed to obtain dynamic buckling load and critical load duration by comparing the static buckling path with the peak value of the dynamic displacement response.And then,the influence of graphene nanoplatelets(GPLs)distribution mode,of weight fraction,of geometric parameters,of geometry and dimensions,of load duration on the arch's dynamic mechanical behavior is studied through parametric analysis.It is found that:adding a small amount of GPLs as the reinforced composite can significantly improve the dynamic buckling load of the arch,and X-type GPLs distribution mode can achieve the most effective stiffness enhancement effect.With other parameters unchanged,the effect of the thinner and larger GPLs layer on the arch reinforcement of FG-GPLRC arch is more obvious.

关 键 词：石墨烯片材 脉冲荷载 有限元方法 参数分析 动力屈曲 

分 类 号：TQ127.11[化学工程—无机化工] TB33[一般工业技术—材料科学与工程]