碳纳米管增强钛基复合材料的界面应力分布

Stress distribution at interface of carbon nanotubes reinforced titanium matrix composites

为了了解工业领域中综合性能优异的金属基复合材料,采用结构分析软件ANSYS建立了有限元模型,研究了复合材料界面应力场的分布情况.结果表明,在受压载荷作用下,钛基复合材料发生屈服现象的可能性较小,但碳纳米管的顶部界面边缘处出现了明显的应力集中现象,导致此处发生断裂破坏的可能性相对较大.在拉伸载荷作用下,钛基复合材料的应力分布比较均匀,且未出现明显的应力集中现象,因而复合材料发生屈服、断裂破坏的可能性较小.当碳纳米管的相位角为15°时,复合材料发生界面脱离和基体开裂的可能性相对较小.

In order to understand the metal matrix composites with excellent comprehensive properties in the industry field, a finite element model was established with the structural analysis software ANSYS, and the distribution situation of stress field at the interface of composites was studied. The results show that under the effect of compressive load, the yield phenomenon is less likely to appear in the titanium matrix composites. An obvious stress concentration appears at the top edge at the interface of carbon nanotubes, which leads to a greater possibility of fracture failure. Under the effect of tensile load, the stress distribution in the titanium matrix composites is relatively uniform, no obvious stress concentration appears, and thus the possibility of yield and fracture failure of the material is smaller. When the phase angle is 15°, the possibility of interface breaking and matrix cracking is relatively small.