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Statistical distribution of mechanical properties for three graphite-epoxy material systems
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Sorem Jr., J. Reese, C. |
| Copyright Year | 1981 |
| Description | Graphite-epoxy composites are playing an increasing role as viable alternative materials in structural applications necessitating thorough investigation into the predictability and reproducibility of their material strength properties. This investigation was concerned with tension, compression, and short beam shear coupon testing of large samples from three different material suppliers to determine their statistical strength behavior. Statistical results indicate that a two Parameter Weibull distribution model provides better overall characterization of material behavior for the graphite-epoxy systems tested than does the standard Normal distribution model that is employed for most design work. While either a Weibull or Normal distribution model provides adequate predictions for average strength values, the Weibull model provides better characterization in the lower tail region where the predictions are of maximum design interest. The two sets of the same material were found to have essentially the same material properties, and indicate that repeatability can be achieved. |
| File Size | 7810960 |
| Page Count | 279 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19810021648 |
| Archival Resource Key | ark:/13960/t8nd0sc3x |
| Language | English |
| Publisher Date | 1981-07-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Normal Density Functions Statistical Analysis Mechanical Properties Graphite-epoxy Composites Compressive Strength Tensile Strength Weibull Density Functions 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 |
