二维平纹编织复合材料压缩力学行为研究  

Analysis of compressive mechanical behaviors of 2-D plain woven composites

作　　者：于平[1] 周平[1] 吴承伟[1] SEABROOKS L 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,大连116024 [2]Florida State University,32313 USA

出　　处：《计算力学学报》2008年第2期224-228,共5页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(10421002,10332010);博士点专项基金(20030141013);辽宁省科学技术基金(20052178)资助项目

摘　　要：通过对二维平纹编织复合材料压缩力学性能进行三维有限元计算,对复合材料在沿垂直于编织平面方向和纤维束方向压缩后的微观应力场进行了分析。对于沿垂直于编织平面方向的压缩(即横向压缩),发现在经纬向纤维束相互交替处基体材料的横向压应力最大,是其薄弱部位。分析表明,与0°/90°层合板相比,编织复合材料受到横向压缩载荷时,自由边界处层间剪应力较大,容易发生层间裂纹,与实验观察相吻合。通过改变纤维束截面尺寸和纤维束之间间隙大小研究了破坏面角度的变化。Using finite element analysis method, a 3-dimensional （3-D） analysis of the stress distribution was carried out for 2-D plain woven composites under compression. For compression in the direction perpendicular to woven plane （transverse compression）, the maximum compressive stress of the matrix is found to occur at the interlacing junctions of the fiber yarns, which tends to make it failure. The analysis shows that compared with 0°/90° laminates, the maximum interlaminar shear stress is in the free boundary under transverse compression for 2-D woven composites, as a result that interlaminar crack may appear here. That is agreement with the experiment result. The angle of the failure plane is studied in various cross-sectional dimensions and clearances between the fiber yarns.

关 键 词：复合材料 平纹 有限元 横向压缩 

分 类 号：TB330.1[一般工业技术—材料科学与工程]