Addressing Tension Instability in SPH Methods.

Abstract

Smoothed particle hydrodynamics (SPH) has the potential to be an important method for structural analysis. However, the SPH method is currently plagued by tension instability. In this work, a new unconventional approach is introduced, in which the stresses are calculated at points other than the SPH nodes, to address this difficulty. This algorithm is implemented into a one dimensional (1D) program called SPH1D. In addition, objective stress rate calculations are discussed and specialized to 1D applications. The results from applying the unconventional approach to a simple bar are very encouraging. The bar holds together in tension and compares quite well to a finite element analysis.

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Document Details

Document Type
Technical Report
Publication Date
Dec 30, 1994
Accession Number
ADA289531

Entities

People

  • C. T. Dyka
  • R. P. Ingel

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Addressing
  • Constitutive Equations
  • Displacement
  • Elastic Materials
  • Energy Conservation
  • Equations
  • Finite Element Analysis
  • Instability
  • Linear Momentum
  • Materials
  • Materials Science
  • Mathematical Analysis
  • Mechanics
  • Military Research
  • Modulus Of Elasticity
  • Momentum
  • Standards

Readers

  • Computational Fluid Dynamics (CFD)
  • Economics
  • Materials Science (Mechanical Engineering).