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An analytical/numerical correlation study of the multiple concentric cylinder model for the thermoplastic response of metal matrix composites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Salzar, Robert S. Williams, Todd O. Pindera, Marek-Jerzy |
| Copyright Year | 1993 |
| Description | The utility of a recently developed analytical micromechanics model for the response of metal matrix composites under thermal loading is illustrated by comparison with the results generated using the finite-element approach. The model is based on the concentric cylinder assemblage consisting of an arbitrary number of elastic or elastoplastic sublayers with isotropic or orthotropic, temperature-dependent properties. The elastoplastic boundary-value problem of an arbitrarily layered concentric cylinder is solved using the local/global stiffness matrix formulation (originally developed for elastic layered media) and Mendelson's iterative technique of successive elastic solutions. These features of the model facilitate efficient investigation of the effects of various microstructural details, such as functionally graded architectures of interfacial layers, on the evolution of residual stresses during cool down. The available closed-form expressions for the field variables can readily be incorporated into an optimization algorithm in order to efficiently identify optimal configurations of graded interfaces for given applications. Comparison of residual stress distributions after cool down generated using finite-element analysis and the present micromechanics model for four composite systems with substantially different temperature-dependent elastic, plastic, and thermal properties illustrates the efficacy of the developed analytical scheme. |
| File Size | 1421211 |
| Page Count | 38 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19930017897 |
| Archival Resource Key | ark:/13960/t12p01x3j |
| Language | English |
| Publisher Date | 1993-05-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Elastic Media Stiffness Matrix Temperature Dependence Boundary Value Problems Concentric Cylinders Substrates Finite Element Method Micromechanics Isotropy Algorithms Elastoplasticity Stress Distribution Metal Matrix Composites Mathematical Models Plastic Properties Elastic Properties Thermodynamic Properties Thermoplasticity Assemblies Microstructure Residual Stress Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
