High fidelity simulation of low velocity impact behavior of CFRP laminate

Masaya Ebina, Akinori Yoshimura, Kenichi Sakaue, Anthony M. Waas

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In this paper, finite element model which simulates damage extent of CFRP laminate subjected to low velocity impact (LVI) is proposed. It is well-known that face-on LVI against the CFRP laminate can significantly degrade the material performance, although it leaves only barely visible impact damage (BVID). Hence, it is quite important to precisely predict damage of CFRP laminate caused by LVI. The validity of the model is demonstrated by comparing experimental and numerical results. Experimental impact response (i.e. load-history curve) and damage extent of CFRP laminate were obtained from drop-weight test and non-destructive inspection (such as C-scan, radiograph and X-ray CT), respectively. Numerical results were obtained from finite element (FE) analysis done on Abaqus/Explicit 2016, performed using JAXA's supercomputer system, "JSS2". Proposed model in this paper was implemented using user subroutine VUMAT. The FE model of the CFRP laminate is lamina-level, therefore a laminate is divided into each lamina, and lamina is divided into continuum shell elements. In the present model, each damage mode is modeled in each manner. Fiber damage is modeled by smeared crack model (SCM). In-plane ply cracks are modeled by the enhanced continuum damage mechanics (ECDM) model, which is composed of continuum damage mechanics (CDM) and SCM. Pre-peak nonlinear behavior caused by micro cracks, and post-peak softening behavior caused by matrix cracks are modeled by CDM and SCM, respectively. Delamination between laminae is modeled by cohesive behavior based on the contact formulation. The numerical results obtained from the present model show good agreement with experimental results. Regarding the delamination shape and its size, numerical results and experimental results agree very well. The validity of the present model was demonstrated.

Original languageEnglish
Title of host publication32nd Technical Conference of the American Society for Composites 2017
EditorsWenbin Yu, R. Byron Pipes, Johnathan Goodsell
PublisherDEStech Publications Inc.
Pages1293-1308
Number of pages16
ISBN (Electronic)9781510853065
Publication statusPublished - 2017
Event32nd Technical Conference of the American Society for Composites 2017 - West Lafayette, United States
Duration: 2017 Oct 232017 Oct 25

Publication series

Name32nd Technical Conference of the American Society for Composites 2017
Volume2

Other

Other32nd Technical Conference of the American Society for Composites 2017
CountryUnited States
CityWest Lafayette
Period17/10/2317/10/25

ASJC Scopus subject areas

  • Ceramics and Composites

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    Ebina, M., Yoshimura, A., Sakaue, K., & Waas, A. M. (2017). High fidelity simulation of low velocity impact behavior of CFRP laminate. In W. Yu, R. B. Pipes, & J. Goodsell (Eds.), 32nd Technical Conference of the American Society for Composites 2017 (pp. 1293-1308). (32nd Technical Conference of the American Society for Composites 2017; Vol. 2). DEStech Publications Inc..