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Nonlinear effects on composite laminate thermal expansion
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Pipes, R. B. Rosen, B. W. Hashin, Z. |
| Copyright Year | 1979 |
| Description | Analyses of Graphite/Polyimide laminates shown that the thermomechanical strains cannot be separated into mechanical strain and free thermal expansion strain. Elastic properties and thermal expansion coefficients of unidirectional Graphite/Polyimide specimens were measured as a function of temperature to provide inputs for the analysis. The + or - 45 degrees symmetric Graphite/Polyimide laminates were tested to obtain free thermal expansion coefficients and thermal expansion coefficients under various uniaxial loads. The experimental results demonstrated the effects predicted by the analysis, namely dependence of thermal expansion coefficients on load, and anisotropy of thermal expansion under load. The significance of time dependence on thermal expansion was demonstrated by comparison of measured laminate free expansion coefficients with and without 15 day delay at intermediate temperature. |
| File Size | 2365148 |
| Page Count | 60 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790009094 |
| Archival Resource Key | ark:/13960/t3gx93z2f |
| Language | English |
| Publisher Date | 1979-02-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Thermodynamics Thermal Expansion Composite Materials Stress-strain Relationships Graphite Polyimides Nonlinearity Analysis Mathematics Elastic Properties Laminates Thermal Stresses 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 |
