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Title: Fatigue modeling for carbon/epoxy unidirectional composites under various stress ratios considering size effects

Abstract

In this work, fatigue tests for unidirectional (UD) CFRP composite specimens of various sizes are conducted under different stress ratios. The results show that the specimen size has considerable influence on the transverse tension-tension fatigue performance of UD laminates. The underlying fatigue mechanisms are also investigated through SEM observations. Moreover, a fatigue life prediction method considering size effects is presented, and a good correlation is observed between the prediction and the test data. Lastly, to allow for an evaluation of the effects of mean stress, constant fatigue life diagrams for 0°, 10°, and 90° UD composites are established based on four-segment anisomorphic model.

Authors:
 [1];  [2];  [2];  [2];  [2]; ORCiD logo [1];  [3];  [1];  [1]
  1. Nanjing University of Aeronautics and Astronautics (China)
  2. Ford Motor Company, Dearborn, MI (United States)
  3. Univ. of Michigan, Dearborn, MI (United States)
Publication Date:
Research Org.:
Ford Motor Company, Dearborn, MI (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1504743
Grant/Contract Number:  
EE0006867
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
International Journal of Fatigue
Additional Journal Information:
Journal Volume: 120; Journal Issue: C; Journal ID: ISSN 0142-1123
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; CFRP composites; Fatigue model; Size effect; Constant fatigue life diagram

Citation Formats

Liu, Haolong, Ojha, Avinesh, Li, Ziang, Engler-Pinto, Carlos C., Su, Xuming, Sun, Qingping, Kang, Hongtae, Wen, Weidong, and Cui, Haitao. Fatigue modeling for carbon/epoxy unidirectional composites under various stress ratios considering size effects. United States: N. p., 2018. Web. doi:10.1016/j.ijfatigue.2018.11.009.
Liu, Haolong, Ojha, Avinesh, Li, Ziang, Engler-Pinto, Carlos C., Su, Xuming, Sun, Qingping, Kang, Hongtae, Wen, Weidong, & Cui, Haitao. Fatigue modeling for carbon/epoxy unidirectional composites under various stress ratios considering size effects. United States. doi:10.1016/j.ijfatigue.2018.11.009.
Liu, Haolong, Ojha, Avinesh, Li, Ziang, Engler-Pinto, Carlos C., Su, Xuming, Sun, Qingping, Kang, Hongtae, Wen, Weidong, and Cui, Haitao. Fri . "Fatigue modeling for carbon/epoxy unidirectional composites under various stress ratios considering size effects". United States. doi:10.1016/j.ijfatigue.2018.11.009.
@article{osti_1504743,
title = {Fatigue modeling for carbon/epoxy unidirectional composites under various stress ratios considering size effects},
author = {Liu, Haolong and Ojha, Avinesh and Li, Ziang and Engler-Pinto, Carlos C. and Su, Xuming and Sun, Qingping and Kang, Hongtae and Wen, Weidong and Cui, Haitao},
abstractNote = {In this work, fatigue tests for unidirectional (UD) CFRP composite specimens of various sizes are conducted under different stress ratios. The results show that the specimen size has considerable influence on the transverse tension-tension fatigue performance of UD laminates. The underlying fatigue mechanisms are also investigated through SEM observations. Moreover, a fatigue life prediction method considering size effects is presented, and a good correlation is observed between the prediction and the test data. Lastly, to allow for an evaluation of the effects of mean stress, constant fatigue life diagrams for 0°, 10°, and 90° UD composites are established based on four-segment anisomorphic model.},
doi = {10.1016/j.ijfatigue.2018.11.009},
journal = {International Journal of Fatigue},
issn = {0142-1123},
number = C,
volume = 120,
place = {United States},
year = {2018},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on November 9, 2019
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