Advertisement

Validating FSI Simulations in LS-DYNA 971 R7

  • Kevin A. GardnerEmail author
  • Jeremy D. Seidt
  • Amos Gilat
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

The latest release of LS-DYNA includes a multi-physics solver that combines computational fluid dynamics and structural solvers. This capability is a new computational design tool for the automotive industry. One of the simplest ways to reduce weight and increase fuel efficiency is to trim unnecessary weight from the body panels which comprise the vehicle. However, body panels that are made too thin are susceptible to a phenomenon known as oil-canning under loads such as those encountered from typical automotive air dryers. Oil-canning is a complex phenomenon that can result in permanent deformation or the panel can snap back. Oil-canning is to be avoided, even if temporary, for customer satisfaction reasons. An experimental program is presented where automotive roof panels are placed in a custom test rig and loaded with a high velocity air jet to replicate the oil-canning phenomenon. Flow characterization is performed using an array of piezo-electric pressure sensors. Panel deformation is measured using three-dimensional digital image correlation. Experimental data will be used to determine the validity of the multi-physics solver as an engineering design tool.

Keywords

Fluid–structure interaction Oil-canning Digital image correlation Numerical methods Automotive 

Notes

Acknowledgements

The authors would like to thank Duane Detwiler, Andy Fields, Allen Sheldon, Thomas Ramsay, and Yong-Bae Cho of Honda R&D Americas, Inc. and Ed Helwig and Emily Nutwell of LSTC for their support of this project. The authors would also like to thank Michael Tomaso of the architecture department at Ohio State who machined the custom forms to clamp the roof panel.

References

  1. 1.
    Pin FD (2010) Advances on the incompressible CFD solver in LS-DYNA. In: 11th international LS-DYNA users conferenceGoogle Scholar
  2. 2.
    Espinosa HD, Lee S, Moldovan N (2006) A novel fluid structure interaction experiment to investigate deformation of structural elements subjected to impulsive loading. Exp Mech 46:805–824CrossRefGoogle Scholar
  3. 3.
    Wei X, Tran P, Vaucorbeil A, Ramaswamy RB, Latourte F, Espinosa HD (2013) Three-dimensional numerical modeling of composite panels subjected to underwater blast. J Mech Phys Solids 61:1319–1336CrossRefMathSciNetGoogle Scholar
  4. 4.
    Wei X, Vaucorbeil A, Tran P, Espinosa HD (2013) A new rate-dependent unidirectional composite model - application to panels subjected to underwater blast. J Mech Phys Solids 61:1305–1318CrossRefMathSciNetGoogle Scholar
  5. 5.
    Kumar P, Shukla A (2011) Dynamic response of glass panels subjected to shock loading. J Non-Cryst Solids 357:3917–3923CrossRefGoogle Scholar
  6. 6.
    Kumar P, Stargel DS, Shukla A (2013) Effect of plate curvature on blast response of carbon composite panels. Compos Struct 99:19–30CrossRefGoogle Scholar
  7. 7.
    Wang E, Wright J, Shukla A (2011) Analytical and experimental study on the fluid structure interaction during air blast loading. J Appl Phys 110:114901CrossRefGoogle Scholar
  8. 8.
    He WX, Hong HP (2012) Probabilistic characterization of roof panel uplift capacity under wind loading. Can J Civ Eng 39:1285–1296CrossRefGoogle Scholar

Copyright information

© The Society for Experimental Mechanics, Inc. 2015

Authors and Affiliations

  • Kevin A. Gardner
    • 1
    Email author
  • Jeremy D. Seidt
    • 1
  • Amos Gilat
    • 1
  1. 1.Scott Laboratory, Department of Mechanical and Aerospace EngineeringThe Ohio State UniversityColumbusUSA

Personalised recommendations