摘要
采用真空辅助成型的方法制备运动训练器材碳纤维复合材料层合板,研究了40℃和60℃的湿热老化环境下碳纤维复合材料的吸湿率、拉伸强度、弯曲强度、压缩强度和剪切强度变化,并观察了不同老化条件下的拉伸断口形貌。结果表明,温度越高,运动训练器材碳纤维复合材料的平衡吸湿率、线性段斜率和扩散系数越大。当湿热老化温度为40℃和60℃时,随着老化时间延长,碳纤维复合材料的拉伸强度、弯曲强度都先增后减,分别在老化时间为14d和7d时取得最大值。当湿热老化温度为40℃和60℃时,随着老化时间延长,碳纤维复合材料的压缩强度先增大后减小,在老化时间为35d时取得最大值。当湿热老化温度为40℃时,随着老化时间延长,碳纤维复合材料的剪切强度先增大后减小,在老化时间为7d时取得最大值;当湿热老化温度为60℃时,随着老化时间延长,碳纤维复合材料的剪切强度逐渐减小。碳纤维复合材料在湿热环境下的力学性能变化,主要与温度和湿度共同作用下碳纤维复合材料的增塑和固化有关。
Carbon fi ber composite laminates were prepared by vacuum assisted molding. The changes of moisture absorption, tensile strength, bending strength, compressive strength and shear strength of carbon fi ber composite under 40℃ and 60℃ wet and heat aging environments were studied, and the tensile fracture morphology was observed. The results show that the higher the temperature is, the greater the equilibrium moisture absorption rate, linear slope and dif fusion coe ffi cient of carbon fi ber composites are. When the damp heat aging temperature is 40℃ and 60℃, the tensile strength and bending strength of the carbon fi ber composite increase fi rst and then decrease with the aging time, and the maximum values are obtained when the aging time is 14d and 7d, respectively.When the damp heat aging temperature is 40℃ and 60℃, the compressive strength of the carbon fi ber composite increases fi rst and then decreases with the aging time, and the maximum value is obtained when the aging time is 35d. When the damp heat aging temperature is 40℃, the shear strength of the carbon fi ber composite increases fi rst and then decreases with the aging time, and the maximum value is obtained when the aging time is 7d;When the hygrothermal aging temperature is 60℃, the shear strength of carbon fi ber composites decreases with the aging time. The change of mechanical properties of carbon fi ber composites in humid and hot environment is mainly related to the plasticization and curing of carbon fiber composites under the combined action of temperature and humidity.
作者
喻龙
单紫徽
雒晓涛
赵冬
YU Long;SHAN Zi-hui;LUO Xiao-tao;ZHAO Dong(City College of Xi'an Jiaotong University,Xi'an 712039,Shaanxi,China;Xi'an Jiaotong University,Xi'an 710049,Shaanxi,China)
出处
《合成材料老化与应用》
2023年第1期76-79,共4页
Synthetic Materials Aging and Application
关键词
碳纤维复合材料
湿热老化
温度
吸湿率
力学性能
carbon fi ber composite
damp heat aging
temperature
moisture absorption rate
mechanical property
