2.5维自愈合C/SiC复合材料的压缩力学行为

试验研究了2.5维自愈合C/SiC复合材料的压缩力学行为，根据材料的细观结构特点，建立了压缩载荷下的损伤力学模型，得到了经纬向压缩的非线性应力应变关系，预测结果与试验值吻合较好。结果表明，经向和纬向的力学行为不同，纬向的压应力逐渐增大时，切线模量逐渐增大，压缩强度为270.05MPa，而经向压应力逐渐增大时，层间损伤逐渐发生，经纱承受的弯矩越来越大，切线模量逐渐降低，破坏强度为128.66MPa。

Compressive behavior of 2.5D self-healing C/SiC composite

The compressive behavior of 2.5D C/SiC composite was studied by means of experiment. According to the micro-structure of composite, a new mechanical model was established，the nonlinear stress-strain curves in weft and warp directions were gained. The result shows that, the mechanical behavior in weft direction is different from that in warp direction. As the compressive stress in weft direction increases, the modulus increases, and the compressive strength in weft direction is 270.05MPa. As the compressive stress in warp direction increases, the interlaminar damage occurs, the bending moment caused by compressive stress increases, modulus decreases, and the compressive strength in warp direction is 128.66MPa.