Statistical analysis of instability of the strength properties of carbon-fiber-reinforced plastics for simple types of loading
The reliability of structures - defined as the probability of failsafe operation - can be predicted only if reliable information is available on the distribution of the random properties of the constituent materials and the random service conditions to be encountered. Thus, in order to evaluate and normalize the corresponding {open_quotes}safety factors{close_quotes} of the structural materials currently being used, it is necessary to obtain quantitative information on the instability of their strength properties and methods of their evaluation. The scatter of the properties of composites is greater than that of traditional homogenous materials and can be attributed to the heterogeneity of the structure: scatter inevitably results from variations of the properties of each component and the geometry of their mutual arrangement within the composite. It is essential that the empirical sample which is used be representative not only with regard to volume (the number of tests), but also the methods used to prepare and group the specimens. The goal of the present study is to quantitatively evaluate the instability of the strength properties of typical unidirectional carbon-fiber-reinforced plastics for simple types of loading in relation to the method used to form the test samples.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 377029
- Journal Information:
- Mechanics of Composite Materials, Vol. 27, Issue 6; Other Information: PBD: May 1992; TN: Translated from Mekhanika Kompozitnykh Materialov; No. 6, 1015-1022(Nov-Dec 1991)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of adhesive and cohesive forces on the strength of glass-fiber-reinforced plastics with loading times of 10{sup 3}-10{sup 6} sec
Statistical microbuckling propagation model for compression strength prediction of fiber-reinforced composites