盐雾老化环境对碳纤维复合材料力学性能的影响

The Influence of Salt Spray Aging Environment on the Mechanical Properties of Carbon Fiber Composites

采用树脂传递模塑(RTM)成型工艺制备692-2K/T300-12K碳纤维复合材料,对其进行盐雾老化试验,研究该碳纤维复合材料经盐雾老化试验后的增重率、拉伸强度、弯曲强度和动态力学性能的变化,分析盐雾作用下复合材料增重率和力学性能的关系及对其动态力学性能的影响。结果表明,随着老化时间的延长和增重率的增加,复合材料的力学性能呈现下降趋势,对弯曲试样力学性能的影响大于拉伸试样。盐雾老化会使该碳纤维复合材料的储能模量和玻璃化转变温度有所下降。

692-2K/T300-12K carbon fiber composite material was prepared by resin transfer molding(RTM)process,and the salt spray aging test was carried out to study the weight gain rate of the carbon fiber composite material after salt spray aging test.It focuses on changes in tensile strength,flexural strength and dynamic mechanical properties,analysis of the relationship between the weight gain rate and mechanical properties of composite materials under the action of salt spray,and the influence on their dynamic mechanical properties.The results show that with the extension of the aging time and the increase of the weight gain rate,the mechanical properties of the composite material show a downward trend,and the impact on the mechanical properties of the bent specimen is greater than that of the tensile specimen.Salt spray aging will reduce the storage modulus and glass transition temperature of the carbon fiber composite material.