Accession Number : ADA264337


Title :   Damage Mechanics in 2-D and 3-D Microstructures


Descriptive Note : Final rept. Jul 89-Jun 92,


Corporate Author : PURDUE UNIV LAFAYETTE IN DEPT OF MATERIALS ENGINEERING


Personal Author(s) : Bowman, Keith J ; Ostoja-Starzewski, Martin


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264337.pdf


Report Date : 26 Feb 1993


Pagination or Media Count : 50


Abstract : The evolution of damage and strategies for assessing damage when it has occurred in structural materials is the primary focus of this research program. The research effort is collaborative one on mesomechanics called 'Damage in 2D and 3D Microstructures' (AFOSR-89-0423). What distinguishes this effort from others is the attempt to perform incisive model experiments to assist in evaluating stochastic models for constitutive laws (elasticity and conductivity) mechanical response plasticity and hardness and associated damage processes. The theoretical models are designed to be elegant and efficient in the use of computing resources as opposed to brute force procedures which handle systems with different scales by scaling up the size of the computer. The essence of this work is to explore sample size microstructure relationships via stochastic models which reflect the same types of variability present in the response of real materials. This leads directly to concerns with effective properties of materials. Thus, research integrates the effects of microstructure and preferred orientation on the effective tensorial properties of polycrystalline materials.... Microstructure, Damage, Brittle Fracture, Failure, Mechanics, Stochastic, Elasticity, Two-dimensional.


Descriptors :   *MICROSTRUCTURE , *DAMAGE , *FAILURE(MECHANICS) , STRATEGY , MODELS , CONDUCTIVITY , COMPUTERS , TWO DIMENSIONAL , HARDNESS , POLYCRYSTALLINE , MATERIALS , FAILURE , THREE DIMENSIONAL , BRITTLENESS , RESPONSE , RESOURCES , PLASTIC PROPERTIES


Subject Categories : Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE