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Effects of shape and misalignment of fibers on the failure response of carbon fiber reinforced polymers

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Abstract

An integrated computational framework is presented for the automated modeling and simulation of the failure response of carbon fiber reinforced polymers (CFRPs) with arbitrary-shaped, randomly-misaligned, embedded fibers. The proposed approach relies on a new packing/relocation-based reconstruction algorithm to synthesize realistic 3D representative volume elements (RVEs) of CFRP. A non-iterative mesh generation algorithm is then employed to create high-quality finite element models of each RVE. The failure response of CFRP is simulated using ductile and cohesive-contact damage models for the epoxy matrix and along fiber-matrix interfaces, respectively. In addition to studying the impact of fiber misalignments, this computational framework is employed to investigate the effect of cross-sectional geometry of fibers (circular versus oval shaped) on the strength, ductility, and toughness of CFRP subject to tensile and compressive loads applied transverse to the fibers direction.

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Acknowledgements

This work has been supported by the Air Force Office of Scientific Research (AFOSR) under Grant Number FA9550-17-1-0350 and the Ohio State University Simulation Innovation and Modeling Center (SIMCenter) through support from Honda R&D Americas, Inc. The authors also acknowledge the allocation of computing time from the Ohio Supercomputer Center (OSC).

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  1. Department of Integrated Systems Engineering, The Ohio State University, 1971 Neil Avenue, Columbus, OH, 43210, USA

    Hossein Ahmadian

  2. Department of Mechanical and Aerospace Engineering, The Ohio State University, 201 W 19th Avenue, Columbus, OH, 43210, USA

    Ming Yang & Anand Nagarajan

  3. Department of Mechanical and Aerospace Engineering, Department of Materials Science and Engineering, The Ohio State University, 201 W 19th Avenue, Columbus, OH, 43210, USA

    Soheil Soghrati

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  1. Hossein Ahmadian
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Ahmadian, H., Yang, M., Nagarajan, A. et al. Effects of shape and misalignment of fibers on the failure response of carbon fiber reinforced polymers. Comput Mech 63, 999–1017 (2019). https://doi.org/10.1007/s00466-018-1634-1

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