TY - JOUR
T1 - Multiscale modeling of free-surface effect on crack formation in unidirectional off-axis laminates
AU - Kumagai, Yuta
AU - Onodera, Sota
AU - Nagumo, Yoshiko
AU - Okabe, Tomonaga
AU - Yoshioka, Kenichi
N1 - Funding Information:
T.O. thanks Toray Industries, Inc. and Toray Composites (America), Inc., for support of this study. This work was partly supported by the Cross-ministerial Strategic Innovation Promotion Program. This work was also supported by the Ministry of Education, Culture, Sports, Science and Technology of Japan under Grant-in-Aid for Scientific Research (C) No. 15K06597. In addition, this work was partly supported by Innovative Structural Materials Association.
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/7/1
Y1 - 2017/7/1
N2 - A multiscale approach based on the mesh superposition method is applied to unidirectional CFRP laminates to evaluate the influence of the deformation field near the free-surface region on crack formation. Our approach employs two different scale analyses: local analysis utilizing a model composed of carbon fibers with micron-scale diameter and matrix resin, and global analysis employing a homogenized model assumed to be an anisotropic elasto-plastic body. Global analysis is conducted to evaluate the macroscopic deformation behavior of laminates. The local model is superimposed on the global model, maintaining the continuity of the displacement field between global and local domains. Local analysis is then performed to predict crack initiation and crack propagation, using the displacement field obtained from the global analysis. Our simulated results indicate that the initial crack occurring on the free-surface region does not affect the final failure strain.
AB - A multiscale approach based on the mesh superposition method is applied to unidirectional CFRP laminates to evaluate the influence of the deformation field near the free-surface region on crack formation. Our approach employs two different scale analyses: local analysis utilizing a model composed of carbon fibers with micron-scale diameter and matrix resin, and global analysis employing a homogenized model assumed to be an anisotropic elasto-plastic body. Global analysis is conducted to evaluate the macroscopic deformation behavior of laminates. The local model is superimposed on the global model, maintaining the continuity of the displacement field between global and local domains. Local analysis is then performed to predict crack initiation and crack propagation, using the displacement field obtained from the global analysis. Our simulated results indicate that the initial crack occurring on the free-surface region does not affect the final failure strain.
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U2 - 10.1016/j.compositesa.2017.03.016
DO - 10.1016/j.compositesa.2017.03.016
M3 - Article
AN - SCOPUS:85016244817
SN - 1359-835X
VL - 98
SP - 136
EP - 146
JO - Composites - Part A: Applied Science and Manufacturing
JF - Composites - Part A: Applied Science and Manufacturing
ER -