论文部分内容阅读
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。
In this paper, we use the split Hopkinson pressure bar device to compress the glass fiber three-dimensional orthogonal woven composite under the high strain rate and in the in-plane and out-of-plane compression tests and perform the corresponding quasi-static compression under the universal testing machine. Three high strain rates and quasi-static stress-strain curves were obtained, and the failure morphology of the samples was observed. The results show that the glass fiber three-dimensional orthogonal woven composites are strain rate sensitive materials, and the maximum stress and compressive modulus increase with the increase of strain rate. The three-dimensional orthogonality structure makes the composites show anisotropy: the maximum out-of-plane stress, the failure strain is larger than in-plane; the in-plane compressive modulus is larger than the out-of-plane and the compressive modulus is more sensitive to out-of- ; Latitude and longitude compared to the maximum latitudinal stress is greater than the warp.