Finite Element Analysis of Soft-Body Impact

Abstract

This report describes the development of analytical and numerical methods for determining the dynamic structural response caused by soft body impact. The prediction of stress and deflection behavior of aircraft transparencies due to collisions with birds is the primary area of application. When the structure is relatively flexible, such an impact involves strong coupling between the dynamic motion of the colliding bodies. The developed techniques use appropriate finite element methods in each region, together with a contact solution algorithm, to compute the coupled structural response, while the soft-body motions are integrated using a simpler explicit technique. The soft body dynamic analysis uses a Lagrangian description to track the free surface and impact region accurately, with an automatic rezoning procedure to correct large mesh distortions. Originator supplied keywords; Nonlinear structural analysis; Finite element method; Soft body impact; Hydrodynamic impact; Aircraft transparency; Impact loading; MAGNA computer program.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1984
Accession Number
ADA158438

Entities

People

  • R. A. Brockman

Organizations

  • University of Dayton

Tags

Communities of Interest

  • Air Platforms
  • Cyber
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Aircrafts
  • Cartesian Coordinates
  • Computational Science
  • Computer Programs
  • Computers
  • Dynamic Response
  • Finite Element Analysis
  • Hydrodynamics
  • Materials
  • Mechanical Properties
  • Mechanics
  • Physical Properties
  • Stresses
  • Structural Response
  • Three Dimensional
  • Vehicle Equipment

Fields of Study

  • Engineering

Readers

  • Aerospace Engineering
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Structural Dynamics.