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Concurrent micromechanical tailoring and fabrication process optimization for metal-matrix composites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Saravanos, D. A. Morel, M. Chamis, Christos C. |
| Copyright Year | 1990 |
| Description | A method is presented to minimize the residual matrix stresses in metal matrix composites. Fabrication parameters such as temperature and consolidation pressure are optimized concurrently with the characteristics (i.e., modulus, coefficient of thermal expansion, strength, and interphase thickness) of a fiber-matrix interphase. By including the interphase properties in the fabrication process, lower residual stresses are achievable. Results for an ultra-high modulus graphite (P100)/copper composite show a reduction of 21 percent for the maximum matrix microstress when optimizing the fabrication process alone. Concurrent optimization of the fabrication process and interphase properties show a 41 percent decrease in the maximum microstress. Therefore, this optimization method demonstrates the capability of reducing residual microstresses by altering the temperature and consolidation pressure histories and tailoring the interphase properties for an improved composite material. In addition, the results indicate that the consolidation pressures are the most important fabrication parameters, and the coefficient of thermal expansion is the most critical interphase property. |
| File Size | 675548 |
| Page Count | 18 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19910009924 |
| Archival Resource Key | ark:/13960/t5cc5x10w |
| Language | English |
| Publisher Date | 1990-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Micromechanics Fabrication Temperature Measurement Thickness Thermal Expansion Consolidation Fiber-matrix Interfaces Graphite Metal Matrix Composites Pressure Measurement Residual Stress Optimization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
