摘要
采用中性盐雾条件模拟海洋大气环境进行加速老化试验,评价玻璃纤维增强环氧改性酚醛树脂基复合材料(GFRP)在海洋气候中的耐久性。通过该复合材料经盐雾老化后的质量变化和纵向拉伸强度、横向拉伸强度、压缩强度、层间剪切强度的变化,结合湿热老化机理,研究其老化规律。结果表明,随着老化时间的增加,复合材料的吸湿量增加,力学强度下降,压缩和层间剪切曲线表现出塑性特征。吸湿最初阶段对力学性能影响最大,纵向拉伸强度、横向拉伸强度、压缩强度、层间剪切强度分别下降到56.1%、54.7%、54.0%、61.0%。其中拉伸强度变化趋势最稳定,更适用于评价该复合材料的老化程度。
The accelerated salt-spray test was used to simulate a marine environment and determine the durability of glass fiber reinforced polymer（GFRP）composites in marine environments. Aging behavior after exposure in salt- spray environment was studied by changes in mass gain and mechanical properties including tension, compression and interlaminar shearing strength. The mass gain increases and the mechanical properties decrease with the aging time. Curves of the compression and interlaminar shearing test show more plastic than the original ones. Mechanical properties decrease quickly in the initial period of moisture absorption. The longitude tensile strength, transverse tensile strength, compression strength and interlaminar shearing strength decrease to 56.1%, 54.7%, 54.0%, 61.0%, respectively. The tensile strength is more steady and more suitable for evaluating the aging degree of the composites.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2007年第3期18-22,共5页
Acta Materiae Compositae Sinica
基金
国防型号项目
关键词
玻璃纤维
树脂
复合材料
盐雾
力学性能
glass fiber
resins
composites
salt spray
mechanical properties
