摘要
为研究非连续湿热作用对树脂基复合材料性能的影响及其湿热老化机理,对碳纤维增强环氧树脂基复合材料T700/TR1219B进行了湿热环境因素对比实验及循环吸湿实验,对比了经历不同吸湿-脱湿历程试样的弯曲和层间剪切性能及微观断口形貌。结果表明,单一湿度因素使T700/TR1219B体系力学性能降低,单一温度因素使其弯曲性能降低,层间剪切性能增强,湿热耦合作用会加剧材料性能的劣化;材料的吸湿和脱湿过程均满足Fick定律;随着循环次数的增加,材料的吸湿和脱湿速率均有所加快;吸湿后T700/TR1219B体系力学性能降低,出现树脂脱落等现象,脱湿后弯曲性能无法恢复未老化状态,但层间性能略有增加,且界面脱黏情况得以改善,层间裂纹不再明显。
In order to study the effect and ageing mechanism of discontinuous hygrothermal environment on properties of resin matrix composite, the T700/TR1219B specimens were treated with a contrast experiment of different hygrothermal factors and a cyclic moisture absorption treatment. The flexural and interlaminar shear properties were tested and the microscopic morphologies of specimens were observed during absorption-desorption processes. The results show that： single moisture factor decreases TT00/TR1219B mechanical propeties, single temperature factor decreases its flexural strength while increasing the interlaminar shear strength, hygrothermal environment intensifies the degradation of T700/TR1219B mechanical properties. Its absorption and desorption behavior of water all follow the Fick＇s law. The rate of moisture absorption and desorption increases certainly with the absorption cycles. After moisture absorption, mechanical properties decrease and resin falls off. After desorption, the flexural strength cannot be restored to the original level while interlaminar shear strength is higher than original level, interface debonding is improved and interlaminar cracks are not obvious.
出处
《塑料工业》
CSCD
北大核心
2017年第12期83-86,101,共5页
China Plastics Industry
基金
中央高校基本科研业务费(3122015Z004)
关键词
树脂基复合材料
吸湿-脱湿循环
湿热老化因素
力学性能
断口形貌
Resin Matrix Composite
Absorption-Desorption Cycle
Hygrothermal Aging Factors
Mechanical Properties
Fracture Morpholopy
