On Modeling the Effect of Pore Shapes on Ductile Fracture

Abstract

An initial effort has been made to simulate the effect of pore shape on the ductibility of porous metals. The simulation is performed utilizing a computer model in which distributions of pores are modeled in two dimensions by pseudo-random arrays of either circular or elongated holes. As expected, the simulations predict that tensile ductility decreases as the area fraction of holes increase and that specimens containing elongated holes are less ductile. However, somewhat unexpected is the prediction that the hole/pore shape effect becomes more pronounced with increasing area fraction of holes/pores. The results can be readily understood in terms of the local strain distributions near holes, the dependence of inter-hole spacings on the area fraction of holes, and strain-based hole-linking criteria. (jes)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1990
Accession Number
ADA221774

Entities

People

  • A. B. Geltmacher
  • Donald A. Koss

Organizations

  • Pennsylvania State University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Computer Simulations
  • Engineering
  • Experimental Data
  • Materials
  • Materials Science
  • Military Research
  • Pennsylvania
  • Porosity
  • Porous Materials
  • Porous Metals
  • Simulations
  • Spatial Distribution
  • Strain Hardening
  • Three Dimensional
  • Two Dimensional
  • United States
  • Universities

Readers

  • Materials Science (Mechanical Engineering).

Technology Areas

  • Space
  • Space - Hall-Effect Thruster