Lastly, the failure envelopes of σ 11-σ 22 and σ 11-τ 12 subjected to combined loading conditions are obtained from the computational model, which provide essential inputs for future theoretical failure criteria. The computational results on kink-band formation and stress-strain response show good consistency with our experimental analysis. The next focus of this study is to propose a computational micromechanics model considering local fiber waviness to study the fiber kinking failure mechanism. The results show that the voids in the resin-rich area lead to kink-band splitting, while in some cases the voids cause the kink-band to deflect in a new direction depending on more » the location of the voids. The influence of manufacturing defects and voids on fiber kinking mechanisms is also analyzed. The micrographs reveal that the main failure mechanism in UD laminates is fiber kinking failure. A sequence of failure initiation and propagation is observed based on optical microscopy images of specimens during failure. Here, his study investigates the failure mechanisms of notched unidirectional (UD) carbon fiber reinforced polymer (CFRP) laminates subjected to longitudinal compressive loading. Publication Date: Research Org.: Ford Motor Company, Detroit, MI (United States) Sponsoring Org.: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V) USDOE Office of Energy Efficiency and Renewable Energy (EERE) OSTI Identifier: 1504745 Alternate Identifier(s): OSTI ID: 1636835 Grant/Contract Number: EE0006867 Resource Type: Journal Article: Accepted Manuscript Journal Name: Composites Science and Technology Additional Journal Information: Journal Volume: 172 Journal Issue: C Journal ID: ISSN 0266-3538 Publisher: Elsevier Country of Publication: United States Language: English Subject: 42 ENGINEERING 97 MATHEMATICS AND COMPUTING 36 MATERIALS SCIENCE Carbon fiber-reinforced polymer composites Computational micromechanics model Representative volume element Failure envelope Failure = , Ford Motor Company, Dearborn, MI (United States).of Michigan, Dearborn, MI (United States) ![]() Northwestern Univ., Evanston, IL (United States).The Ohio State Univ., Columbus, OH (United States) Ford Motor Company, Dearborn, MI (United States).Nanjing University of Aeronautics and Astronautics (China). ![]() Furthermore, we have compared the proposed failure criteria with existing experimental data and computational results available in the literature for different types of composites. Additionally, the newly proposed failure criteria show significant improvement according to our computational and experimental results. Based on the failure mechanisms from computational analyses and the comparisons between predicted failure envelopes and classical failure criteria, a new set of homogenized failure criteria is proposed. We have evaluated the performances of these failure criteria and identified the aspects for further improvement in their accuracies for the UD CFRP composites studied herein. Then, these failure envelopes are compared with the classical failure criteria. In this paper, we address this challenge by first applying a well-established computational micromechanics model based on representative volume element to predict the failure envelopes of unidirectional (UD) CFRP composites. Failure prediction for carbon fiber reinforced polymer (CFRP) composites has been a longstanding challenge.
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