Thermal stress distribution around a thermally-insulated polygonal cutout in graphite/epoxy composite laminates under heat flux  

热流作用下石墨/环氧复合材料层合板绝热多边形切口周围的热应力分布

作　　者：Mohammad Hossein BAYATI CHALESHTARI Hadi KHORAMISHAD 

机构地区：[1]School of Mechanical Engineering,Iran University of Science and Technology,Narmak,Tehran 16846,Iran

出　　处：《Journal of Central South University》2021年第11期3418-3433,共16页中南大学学报（英文版）

摘　　要：In this study,the effect of influencing parameters on the stress distribution around a polygonal cutout within a laminated composite under uniform heat flux was analytically examined.The analytical method was developed based on the classical laminated plate theory and two-dimensional thermo-elastic method.A mapping function was employed to extend the solution of a perforated symmetric laminate with a circular cutout to the solution of polygonal cutouts.The effect of significant parameters such as the cutout angular position,bluntness and aspect ratio,the heat flux angle and the laminate stacking sequence in symmetric composite laminate containing triangular,square and pentagonal cutouts was studied.The Neumann boundary condition was used at the edges of the thermally insulated polygonal cutout.The laminate was made of graphite/epoxy(AS/3501) material with two different stacking sequences of [30/45]sand[30/0/-30]_(s).The analytical solutions were well validated against finite element results.本研究分析了在均匀热流下,影响参数对复合材料层合板多边形切口周围应力分布的影响。在经典层合板理论和二维热弹性分析的基础上,建立了分析方法。利用映射函数将带有圆形切口的对称穿孔层压板的解推广到多边形切口的解。研究了三角形、正方形和五角形切口对称复合材料层合板中切口角位置、钝度和宽高比、热通量角和层合板堆叠顺序等重要参数的影响。在绝热多边形切口的边缘采用诺伊曼边界条件。所研究层压板由石墨/环氧树脂(AS/3501)材料制成,具有[30/45]s和[30/0/-30]_(s)两种不同的堆垛顺序。采用有限元结果验证了解析解的有效性。

关 键 词：analytical solution thermal stress analysis polygonal cutout complex variable method polymeric composite 

分 类 号：TB332[一般工业技术—材料科学与工程]