摘要
对含有因局部纤维断裂形成的富树脂缺陷的碳纤维/环氧树脂复合材料拉伸性能进行研究,分析缺陷位置与试样拉伸性能的对应关系发现:当富树脂缺陷大小相同位置不同,拉伸强度从高到低分别是:缺陷位于试样1/3处,缺陷位于试样几何中心时,缺陷位于试样1/2处的边缘时。当缺陷位于同一位置时,拉伸强度随缺陷尺寸的增大而降低。通过计算机断层扫描技术(CT)检测缺陷实际尺寸位置,采用有限元仿真技术建立含缺陷的碳纤维/环氧树脂复合材料拉伸强度性能预测模型,预测结果与实验值的误差小于10%,说明了该有限元模型的可靠性,并结合模拟结果分析复合材料的失效机制。
The tensile properties of carbon fiber reinforced epoxy composite with resin rich defects caused by local fiber fracture were studied.The corresponding relationship between defect location and tensile properties was analyzed.It is found that the maximum and minimum tensile strength are observed when the defect is located at 1/3 of the sample and 1/2 of the edge of the sample,respectively whilst the intermediate strength is seen at geometric center of the sample provided the same defect size.When the defect is in the same position,the tensile strength decreases with the increase of defect size.The actual size and location of defects are detected by computed tomography(CT),and the tensile strength prediction model of carbon fiber reinforced epoxy composite with defects is established by using finite element simulation.The error between the simulation values and the experimental values is less than 10%,which shows the reliability of the finite element model.Moreover,the failure mechanism of the composites is analyzed with the simulation results.
作者
葛立立
俞鸣明
方琳
刘雪强
任慕苏
孙晋良
GE Lili;YU Mingming;FANG Lin;LIU Xueqiang;REN Musu;SUN Jinliang(Composite Materials Research Center,Shanghai University,Shanghai 200444 China;Institute of Quartmaster Engineering&Technology,Beijing 100010,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2022年第10期4961-4971,共11页
Acta Materiae Compositae Sinica
基金
上海市优秀学术/技术带头人计划(20XD1434300)
广东省重点研发计划(2019B010929001)。
关键词
有限元仿真
碳纤维/环氧树脂复合材料
富树脂缺陷
失效机制
拉伸强度
finite element simulation
carbon fiber reinforced epoxy composite material
resin-rich defect
failure mechanism
tensile strength
