摘要
在碳纤维树脂复合材料制备及加工过程中均较容易产生各种缺陷,并影响构件最终的加工质量及使用性能。为研究碳纤维树脂复合材料制备过程中产生的缺陷对制孔出口质量的影响,提出一种通过改变预浸料固化温度模拟材料制造缺陷的方法,并对不同温度固化和不同方式铺设的样件进行了模拟制孔试验,分析剩余刚度对材料内部缺陷扩展及制孔出口质量的影响。结果表明,材料的固化温度对制孔出口缺陷存在较大的影响,表明材料的制造缺陷将对制孔质量产生影响;只有当固化温度高于140℃时,单纤维层的加工质量才较为理想;对于按0°/90°/0°/90°方式铺设的未加工材料,由于其剩余刚度较大,制孔过程不产生内部缺陷扩展的最低固化温度可为100℃。
Various types of defects may be introduced during manufacturing and drilling of carbon fiber reinforced plastics,and they will influence on the final quality and performance of the structures.A method,in which the inner-defect is simulated by changing the cure temperature of the prepreg,is proposed to investigate the influence of the manufacturing-induced defects on the quality of drilling exit.Specimens with different cure temperatures and lay-up styles are used to simulate the drilling process,and the influence of residual stiffness on the growth of inner-defect and the exit quality is discussed.The results show that the cure temperature has a great influence on the exit quality,which indicates that manufacturing-induced defects have significant effect on the drilling quality;when the cure temperature is higher than 140 ℃,acceptable quality can be obtained;when the uncut material is in the form of 0°/90°/0°/90° lay-up,the inner-defect will not propagate for high residual stiffness even when the cure temperature is as low as 100 ℃.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2011年第12期19-25,共7页
Journal of Mechanical Engineering
基金
国家自然科学基金(50875034)
国家高技术研究发展计划(863计划
2009AA044304)资助项目
关键词
复合材料
碳纤维
树脂
固化温度
钻削
缺陷
Composite materials Carbon fiber Resin Cure temperature Drilling Defect
