Accession Number : ADA331202

Title :   Instrumentation for High Temperature Testing of Advanced Materials

Descriptive Note : Final rept. 15 Aug 95-14 Aug 96

Corporate Author : PURDUE UNIV LAFAYETTE IN SCHOOL OF AERONAUTICS AND ASTRONAUTICS

Personal Author(s) : Espinosa, Horacio D.

PDF Url : ADA331202

Report Date : 22 MAR 1997

Pagination or Media Count : 8

Abstract : Our research consists of performing plate impact and rod impact experiments designed for specimen recovery. Impact experiments offer several advantages over more traditional quasi-static experiments. In impact experiments, the magnitude and duration of stress pulses can be selected so that the inelastic and/or damage event is stable, and its evolution can be monitored under well defined deformation histories. As a result, damage initiation and evolution rather than simply final accumulated damage can be identified. the main objective of this research is the correlation between the observed damage or inelastic mechanisms and monitored velocity histories at room and high temperature. The correlation is accomplished by performing numerical simulations of the experiments with inelastic models accounting for the observed failure mechanisms. The research methodology will be extended to study material mechanical properties at elevated temperatures. Specific research topics to be addressed are: (1) inelasticity and damage in nanophase ceramics, (2) mechanics of friction and wear of coatings, and (3) dynamic inelasticity in fiber reinforced composites.

Descriptors :   *IMPACT TESTS, *INDUCTION HEATING, COMPUTERIZED SIMULATION, MECHANICAL PROPERTIES, DAMAGE, FIBER REINFORCED COMPOSITES, NUMERICAL ANALYSIS, CORRELATION, FRICTION, WEAR RESISTANCE, BARRIER COATINGS.

Subject Categories : Air Condition, Heating, Lighting & Ventilating
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE