TY - JOUR

T1 - Macro-mechanical modeling and experimental validation of anisotropic, pressure- and temperature-dependent behavior of short fiber composites

AU - Dean, A.

AU - Grbic, N.

AU - Rolfes, R.

AU - Behrens, B.

N1 - Funding Information: Funding : This study was funded by the German Research Foundation (DFG) in the course of the priority program 1640 “joining by plastic deformation” (SPP 1640) (Grant Nos. RO 706/6-2 and BE 1691/158-3 ). Conflict of Interest: The authors hereby declare that they have no conflict of interest. Funding Information: The authors gratefully acknowledge the financial support of the German Research Foundation (DFG) in the course of the priority program 1640 “joining by plastic deformation” (SPP 1640) with contracts No. RO 706/6-3 and BE 1691/158-3. Many thanks and gratitude also goes to José Reinoso, Shahab Sahraee, Benedikt Daum, Nabeel Safdar and Eelco Jansen for the helpful comments and discussions. The support of the Institute of Lightweight Engineering and Polymer Technology (ILK) of TU Dresden and the Federal Institute for Materials Research and Testing (BAM) is highly appreciated.

PY - 2019/12/23

Y1 - 2019/12/23

N2 - In this article, firstly a comprehensive experimental characterization of short fiber reinforced plastic (SFRP) composites sheets is presented. The micro-computed tomography (μCT) is utilized at first to analyze the degree of anisotropy of the SFRP sheets. Then, destructive tests are applied to investigate the mechanical behavior of the sheets at different loading states. The experimental results are presented and discussed thoroughly. Secondly, based on the findings from the experiments conducted, the numerical modeling of the SFRP sheets is discussed. Therein, a user-defined macro-mechanical constitutive model is suggested to represent the sophisticated constitutive behavior of SFRP composites. A brief description of the model and the parameter identification is provided. The performance of the model is assessed and verified via the FE simulation of the destructive characterization tests. Furthermore, the model is employed in the simulation of biaxial stretching experiments of SFRP sheets. The experimental–numerical correlation results demonstrate the validity, accuracy, and applicability of the employed modeling procedure.

AB - In this article, firstly a comprehensive experimental characterization of short fiber reinforced plastic (SFRP) composites sheets is presented. The micro-computed tomography (μCT) is utilized at first to analyze the degree of anisotropy of the SFRP sheets. Then, destructive tests are applied to investigate the mechanical behavior of the sheets at different loading states. The experimental results are presented and discussed thoroughly. Secondly, based on the findings from the experiments conducted, the numerical modeling of the SFRP sheets is discussed. Therein, a user-defined macro-mechanical constitutive model is suggested to represent the sophisticated constitutive behavior of SFRP composites. A brief description of the model and the parameter identification is provided. The performance of the model is assessed and verified via the FE simulation of the destructive characterization tests. Furthermore, the model is employed in the simulation of biaxial stretching experiments of SFRP sheets. The experimental–numerical correlation results demonstrate the validity, accuracy, and applicability of the employed modeling procedure.

KW - A. SFRP composites

KW - B. Material characterization

KW - C. Numerical modeling

KW - D. Finite Element Method (FEM)

UR - http://www.scopus.com/inward/record.url?scp=85059747209&partnerID=8YFLogxK

U2 - 10.1016/j.compstruct.2018.12.045

DO - 10.1016/j.compstruct.2018.12.045

M3 - Article

AN - SCOPUS:85059747209

VL - 211

SP - 630

EP - 643

JO - Composite structures

JF - Composite structures

SN - 0263-8223

ER -