Table of Content

Open Access

ARTICLE

Asymptotic Postbuckling Analysis of Composite and Sandwich Structures via the Assumed Strain Solid Shell Element Formulation

Jihan Kim1, Yong Hyup Kim1, Sung Won Lee2
Seoul National University, Seoul, Korea
University of Maryland, College Park, MD, U.S.A

Computer Modeling in Engineering & Sciences 2004, 6(3), 263-276. https://doi.org/10.3970/cmes.2004.006.263

Abstract

The Koiter's asymptotic method is combined with the assumed strain solid shell element formulation for postbuckling analysis of composite and sandwich structures. The assumed strain solid shell element is free of locking and the small angle assumption, and it allows multiple plies through the element thickness. While laminated composite structures are modeled with single element through the thickness, sandwich structures are modeled with three elements stacked through the thickness to model the face sheets and the core independently. The Koiter's method is used to trace initial postbuckling path. Subsequently, the Koiter's method is switched to the arc-length method to investigate postbuckling behavior involving large deflections. The transition point at which the switching occurs is determined using the postbuckling coefficients, obtained from the asymptotic analysis with the fourth order expansion. Numerical tests demonstrate the validity and effectiveness of the present approach.

Keywords

Koiter's method, buckling and postbuckling, finite element formulation, assumed strain solid shell element formulation, composite sandwich plates, transition point.

Cite This Article

Kim, J., Kim, Y. H., Lee, S. W. (2004). Asymptotic Postbuckling Analysis of Composite and Sandwich Structures via the Assumed Strain Solid Shell Element Formulation. CMES-Computer Modeling in Engineering & Sciences, 6(3), 263–276.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • 972

    View

  • 743

    Download

  • 0

    Like

Share Link

WeChat scan