Eight warp knitted spacer fabric reinforced flax fiber/silicone rubber composite specimens with different structural parameters were prepared by compounding flax fiber/warp knitted spacer fabric with soft silicone rubber.The flat compression test was carried out to explore the effects of the structural parameters,length and mass fraction of the warp knitted spaced fabric on the compressive properties and compression energy absorption performance of the composites.The results show that the composite specimens prepared from spacer fabrics with low tangent and longer flax staple fibers have better compression resistance.When the flax staple fiber mass fraction is too high,the internal friction of the composites increases,then the material compression performance reduces;while the lower mass fraction of flax staple fiber cannot effectively enhance the compression properties of composites.Based on Spence invariant constitutive theory,a meso-compressive mechanics theoretical model of composite materials in the compression state was established,and its compressive performance was simulated and predicted.The results show that the meso-compressive mechanics theoretical model can effectively simulate the compression evolution process of composite samples within 20%deformation.
关键词
亚麻纤维/经编间隔织物/硅橡胶/复合材料/压缩性能/力学模型
Key words
flax fiber/warp knitted spacer fabric/silicone rubber/composite material/compression behavior/mechanical model
维普
万方数据