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Critique of macro flow/damage surface representations for metal matrix composites using micromechanics
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lissenden, Cliff J. Arnold, Steven M. |
| Copyright Year | 1996 |
| Description | Guidance for the formulation of robust, multiaxial, constitutive models for advanced materials is provided by addressing theoretical and experimental issues using micromechanics. The multiaxial response of metal matrix composites, depicted in terms of macro flow/damage surfaces, is predicted at room and elevated temperatures using an analytical micromechanical model that includes viscoplastic matrix response as well as fiber-matrix debonding. Macro flow/damage surfaces (i.e., debonding envelopes, matrix threshold surfaces, macro 'yield' surfaces, surfaces of constant inelastic strain rate, and surfaces of constant dissipation rate) are determined for silicon carbide/titanium in three stress spaces. Residual stresses are shown to offset the centers of the flow/damage surfaces from the origin and their shape is significantly altered by debonding. The results indicate which type of flow/damage surfaces should be characterized and what loadings applied to provide the most meaningful experimental data for guiding theoretical model development and verification. |
| File Size | 1730496 |
| Page Count | 34 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19970003006 |
| Archival Resource Key | ark:/13960/t9285889s |
| Language | English |
| Publisher Date | 1996-10-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Silicon Carbides Micromechanics Debonding Materials Dissipation Viscoplasticity Fiber-matrix Interfaces Titanium Surface Properties Metal Matrix Composites Inelastic Stress Mathematical Models Damage Residual Stress Homogenizing Strain Rate Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
