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A temperature dependent fatigue failure criterion for graphite/epoxy laminates
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Nelson, H. G. Rotem, A. |
| Copyright Year | 1978 |
| Description | A fatigue failure criterion applicable to composite materials is developed and applied to predict the fatigue behavior of graphite/epoxy laminates with particular emphasis on the influence of temperature. Tensile stress-strain curves and tension-tension fatigue curves for various unidirectional, angle-ply and symmetrically balanced laminates were developed at test temperatures of 25 C, 74 C, and 114 C. For most laminates a reduction in both static strength and fatigue strength is observed with increasing temperature. This reduction appeared more severe in fatigue loading than in static tensile loading and most severe where the shear stress in the lamina is the dominate failure mode. Through an analytical formulation of shifting functions for the influences of temperature, all fatigue data are shown to be capable of being reduced to a single reference curve at some temperature. Examples are given which demonstrate the capability of the fatigue failure criterion to predict failure of complex symmetrically balanced laminates from relevant parameters obtained from the observed behavior of unidirectional and angle-ply laminates. |
| File Size | 685286 |
| Page Count | 17 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790001979 |
| Archival Resource Key | ark:/13960/t7xm33z64 |
| Language | English |
| Publisher Date | 1978-10-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Fatigue Tests Tensile Stress Failure Analysis Life Durability Shear Stress Graphite-epoxy Composites Temperature Control Laminates Static Tests Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
