摘要
以航空领域中广泛应用的4种典型碳纤维环氧复合材料为研究对象,采用微机控制高温试验机测试25、50、100、150℃下各试验样品的力学性能参数。通过对试样的应力与应变的关系、拉伸破坏强度、拉伸弹性模量以及保留率的分析,研究碳纤维环氧复合材料的高温力学性能。结果表明,4种碳纤维环氧复合材料的应力-应变曲线整体变化趋势大致相同,在发生拉伸破坏现象之前,应力与应变呈正相关关系;碳纤维环氧复合材料的高温力学性能与材料的铺层角度有关,与受力方向一致的铺层越多,试样的力学性能就越好;通过数据拟合得到了碳纤维环氧复合材料高温力学性能的经验公式。
Four typical carbon fiber/epoxy composites widely used in aviation were used as the research object. The mechani- cal property parameters of the specimens were tested by micro- computer controlling high-temperature testing machines under 25, 50, 100 and 150 ℃. The high-temperature mechanical properties of carbon fiber/epoxy composites were studied by the analysis of the relation of stress-strain, tensile strength, tensile modulus and retention rate. The results indicated that the over- all trend of stress-strain curve of carbon fiber/epoxy composites was roughly the same, there were positive correlation between stress and strain before tensile failure; the high-temperature mechanical properties of carbon fiber/epoxy composites are re- lated to the angle of fiber layer. The more consistent the angle of fiber layer with the stress direction, the better the mechani- cal properties 9f the specimens will be; the experience formula of carbon fiber/epoxy composites high-temperature mechanical properties was obtained by data fitting.
出处
《消防科学与技术》
CAS
北大核心
2016年第12期1659-1663,共5页
Fire Science and Technology
基金
辽宁省科学事业公益研究基金项目(GY2014-C-005)
辽宁省自然科学基金项目(201602567)
关键词
碳纤维
复合材料
高温力学
拉伸破坏强度
carbon fiber
composites
high-temperature mechan-ics
tensile strength
