Cryogenic Damage and Fracture Behaviors of G-11 Woven Glass-Epoxy Laminates
Cryogenic Damage and Fracture Behaviors of G-11 Woven Glass-Epoxy Laminates
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G-11 玻璃纤维环氧层压板的低温损伤和断裂行为
DOI：
10.1299/jsmea.48.91
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Y. Shindo
中科院分区：
文献类型：
--
作者：
K. Sanada;Y. Shindo
讨论了G-11编织玻璃-环氧层合板的低温损伤和断裂行为。结合低温断裂韧性试验，对紧凑拉伸（CT）试样模型进行了有限元分析，以预测断裂和变形。在代表性体积单元内部均匀应变的假设下确定有效弹性模量。霍夫曼的标准被选为标准的纤维为主的失败，和基体开裂检测的最大应变标准。采用虚拟裂纹扩展法计算应变能释放率，进而确定应力强度因子。为了验证模型，实验和分析结果之间的相关性，在荷载-位移响应和损伤增长的程度。计算结果与实验数据吻合较好。
We discuss the cryogenic damage and fracture behaviors of G-11 woven glass-epoxy laminates. In conjunction with the cryogenic fracture toughness test, a finite element analysis was conducted to predict the fracture and deformation for models of the compact tension (CT) specimens. Effective elastic moduli were determined under the assumption of uniform strain inside the representative volume element. Hoffman’s criterion was selected as the criterion for fiber-dominated failure, and matrix cracking was detected by the maximum strain criterion. The virtual crack extension method was adopted to calculate strain energy release rate which leads to determination of stress intensity factor. In order to verify the model, correlations between experimental and analytical results were made, in terms of the load-displacement response and the extent of damage growth. Reasonable agreements between the calculations and the experimental data were achieved.