Damage development in rod-on-rod impact test on 1100 pure aluminum

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • Authors:
  • G Iannitti
  • N Bonora
  • Neil Bourne
  • A. Ruggiero
  • G Testa

Abstract

Stress triaxiality plays a major role in the nucleation and growth of ductile damage in metals and alloys. Although, the mechanisms responsible for ductile failure are the same at low and high strain rate, in impact dynamics, in addition to time resolved stress triaxiality and plastic strain accumulation, pressure also contributes to establish the condition for ductile failure to occur. In this work, ductile damage development in 1100 commercially pure aluminum was investigated by means of rod-on-rod (ROR) impact tests. Based on numerical simulations, using a continuum damage mechanics (CDM) model that accounts for the role of pressure on damage parameters and stochastic variability of such parameters, the impact velocity for no damage, incipient and fully developed damage were estimated. ROR tests at selected velocities were performed and damage distribution and extent were investigated by sectioning of soft recovered samples. Comparison between numerical simulations and experimental results is presented and discussed.

Bibliographical metadata

Original languageEnglish
Title of host publicationSHOCK COMPRESSION OF CONDENSED MATTER
Subtitle of host publicationProceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter 2015
Volume1793
DOIs
Publication statusPublished - Jan 2017