硬度 hardness; solidity; scirrhosity (肿瘤的) 维氏硬度 vickers hardness; 铅是硬度较低的金属之一。 lead is one of the softer metals.; 硬度计 hardometer; durometer; hardnessmeter; sclerometer
The influence factors are crack size , matrix hardness , carbon fiber surface defect and carbon fiber modulus 其影响因素主要为基体裂纹大小、基体硬度、碳纤维表面缺陷、碳纤维模量等。
The results show that pso pyrolysis matrix has low hardness and good extensibility which can relax stress concentration in matrix and interface , and damages carbon fibers slightly . however , psz derived matrix damages carbon fibers largely in physical and chemical ways 结果表明, pso裂解后生成的基体硬度较小且延伸性好,可以缓解基体及界面的应力集中,碳纤维强度保留率较高; psz裂解过程中除了体积收缩对碳纤维带来物理损伤外,还与碳纤维发生严重的化学反应,使碳纤维强度大幅下降。