Numerical evaluation of the influence of porosity on bending properties of 2D carbon/carbon composites
Numerical evaluation of the influence of porosity on bending properties of 2D carbon/carbon composites
复制标题
孔隙率对二维碳/碳复合材料弯曲性能影响的数值评估
DOI：
10.1016/j.compositesb.2017.10.027
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发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
Li Hejun
中科院分区：
文献类型：
--
作者：
Chao Xujiang;Qi Lehua;Tian Wenlong;Hou Xianghui;Ma Wenjing;Li Hejun
采用渐进损伤准则对孔隙率对二维正交铺层C/C复合材料弯曲性能的影响进行了数值模拟。采用Mori-Tanaka方法计算了热解炭基体孔隙率变化时的力学性能。在Abaqus中通过用户自定义子程序（USDFLD）结合刚度退化方案计算极限抗弯强度。通过在两个相邻层之间插入粘性单元来模拟分层。将有限元计算结果与三点弯曲实验结果进行了比较，两者吻合较好。有限元分析结果表明，随着孔隙率的增加，抗弯强度大大降低。当孔隙率达到18%时，抗弯强度下降了57%。90°铺层的主要断裂行为为层间分层和连续裂纹损伤。随着孔隙率的增加，更严重的层间脱层将略有加剧。另外，孔隙率的增加也会加速90°铺层的损伤。
Numerical simulation with progressive damage criterion is implemented to investigate the effect of porosity on the bending properties of 2D cross-ply carbon/carbon (C/C) composites. The mechanical properties of Pyrocarbon matrix regarding the change of porosity are calculated by using Mori-Tanaka approach. Combining with the stiffness degradation scheme, the ultimate bending strengths are calculated in Abaqus though a user-defined subroutine (USDFLD). Delamination is modelled by inserting cohesive elements between two adjacent plies. A good agreement is obtained when the FEM results are compared to three-point bending experiments. The FEM results show that the bending strength decreases greatly with the increase of porosity. When the porosity reaches up to 18%, the bending strength is decreased by 57%. The major fracture behaviors are interlamination delamination and continuous crack damage in 90° plies. With the increase of porosity, more severe interlamination delamination will be slightly aggravated. In addition, the increase of porosity will also accelerate the damage in 90° plies.
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影响因子：
10.9
作者：
W. Benzinger;K. J. Hüttinger
通讯作者：
W. Benzinger;K. J. Hüttinger
DOI：
10.1088/0965-0393/16/5/055001
发表时间：
2008-07
影响因子：
1.8
作者：
V. Shavshukov;A. Tashkinov;Y. Strzhemechny;D. Hui
通讯作者：
V. Shavshukov;A. Tashkinov;Y. Strzhemechny;D. Hui
DOI：
10.1007/bf00794086
发表时间：
1977-03
期刊：
Soviet Powder Metallurgy and Metal Ceramics
影响因子：
--
作者：
S. I. Dement'ev;A. A. Zabolotskii-A.;I. V. Romanovich;S. A. Prokof'ev;S. E. Salibekov
通讯作者：
S. I. Dement'ev;A. A. Zabolotskii-A.;I. V. Romanovich;S. A. Prokof'ev;S. E. Salibekov
影响因子：
13.1
作者：
K. Høiseth;J. Qu
通讯作者：
K. Høiseth;J. Qu
DOI：
--
发表时间：
2003
期刊：
Physics Examination and Testing
影响因子：
--
作者：
Gao Yi-fei
通讯作者：
Gao Yi-fei