纤维增强复合材料横向剪切模量.pdfVIP

32 8 上 海 交 通 大 学 学 报 V ol. 32 N o . 8 1998 8 JO U R NA L O F SHA NG HA I JI AO T O N G U NI VER SI T Y A u g . 1998 * 王人杰, 　徐　浩 ) 考虑界面层的影响对外方内圆模型采用边界 法计算了纤维增强复合材料沿材料 2-、3-主方向的横向剪切模量 sq 0°) 和与2-、3-方向成4 5°方向的横向剪切模量 s q 45°) , 同时 G G 还对六角形模型计算了与2-、3-主方向成45°方向的剪切模量Ghe 45°) , 得到了横向剪切模量 随纤维体积含量Vf 的变化规律. 计算所得Gs q 0°) 要比Gs q 45°) 低得多, 这表明横向剪切模量 也呈各向异性, 但两者均在该横向剪切模量上下限的范围内, 并且两种不同代表性计算单元计 算得到的Gs q 45°) 和Ghe 45 °) 是一致的. 复合材料; 边界元法; 剪切模量 T B 333 - Transverse Shear Modulus of Fiber Reinforced Composit es W ang R enj ie, X u H ao School of Civil and Engineering M echanics, Shanghai J iaot ong Universit y , China Abstract T he t ransv erse shear mo dulu s Gsq 0 ) , alo ng the 2- and 3- pr incipal direct ions of square- array fiber -r einfo rced com posites , and bot h Gsq 45 ) of square-array and Ghe 45 ) of hexag onal -arr ay , along t he direct ion hav ing 45 angle w ith 2- and 3- principal direct ions are calculat ed by u sing a bound- ary element met hod. In t hese cal culations the inf luence of int erphase is considered. From t he obt ained variat io n of t ransverse shear m oduli w ith volume f ract ion of f iber, it can be seen t hat Gs q 0 ) is low er t han G sq 45 ) . How ever, bot h of t hem are in t he reg io n bet ween t he upper and lo wer lim its discu ssed in t he previou s literat ures , and Gsq 45 ) and Ghe 4 5 ) are in agreement w it h each ot her . Key wordscomposit e mat erial; boundary elem ent m et hod ; shear m odulu s 23