三维正交机织复合材料的动态压缩性能  

Dynamic compressive properties of 3D orthogonal woven composites

作　　者：周凯[1] 熊杰[1] 杨斌[1] 毛明忠[1] 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,杭州310018

出　　处：《复合材料学报》2009年第2期171-175,共5页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金项目(10372092);长江学者和创新团队发展计划项目(IRT0654)

摘　　要：本文作者利用分离式Hopkinson压杆装置对玻璃纤维三维正交机织复合材料进行了高应变率下面外、面内方向的压缩试验,并在万能试验机下进行了相应的准静态压缩。获得3个高应变率及准静态下的应力-应变曲线,观察了试样的破坏形貌。结果表明:玻纤三维正交机织复合材料是应变率敏感材料,最大应力、压缩模量随着应变率的增大而增大。三维正交结构使复合材料体现出各向异性:面外的最大应力、失效应变比面内大;面内的压缩模量大于面外,且压缩模量对于应变率的变化比面外方向敏感;经纬向相比,纬向的最大应力大于经向。The high strain rate compressive properties of 3D orthogonal glass fiber woven composite were tested in through-thickness and in-plane directions by a Split Hopkinson Pressure Bar （SHPB）. And the relevant quasi-static compressions were carried out in the material universal testing machine. The stress - strain plots at 3 high strain rates and quasi-static were obtained, and the fractures of the samples were observed. The results indicate that the 3D orthogonal woven composite is strain rate sensitive material： its peak stress and compression modulus increase with the increase of strain rate. The 3D orthogonal woven structure makes the composite show anisotropy： the values of peak stress and failure strain in the out of-plane direction are higher, but its compression modulus reaches a higher value, and tends to be more sensitive to the change of strain rate in the in-plane direction. Comparing the performances in the warp and weft directions reveals that the composite has higher peak stress in the weft direction.

关 键 词：三维正交机织 复合材料 高应变率 压缩 各向异性 

分 类 号：TB332[一般工业技术—材料科学与工程] TB330.1