Accurate predictions of fiber orientation and mechanical properties in long‐fiber‐reinforced composite with experimental validation

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Abstract
Mechanical performance of lightweight automotive materials made of long fiber‐reinforced thermoplastic composites is potentially superior to that of short fiber. However, accurate prediction of fiber orientation is critical for determining reliable mechanical properties. Thus, we investigate the representative fiber orientation models under simple shear flow and discuss in regard to a variety of long fiber suspensions. In addition, the laminate orientation structure of skin–shell–core pattern predicted in 3D injection molding simulation is quantitatively compared with experimental data measured via the micro‐computed tomography. Significantly, we show the effect of fiber orientation states on mechanical properties, including tensile modulus and stress–strain response. POLYM. COMPOS., 39:3434–3445, 2018. © 2017 Society of Plastics Engineers

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