Failure processes unidirectional composite materials
Failure processes in unidirectional composite materials subjected to quasi-static tensile load along the fiber direction are investigated. The emphasis in this investigation is to identify the physical processes taking place during the evolution of failure in these materials. An extensive literature review is conducted and the information relevant to the present topic is summarized. The nature of damage growth in five different commercially available composite systems are studied. In-situ scanning electron microscopy is employed for identifying the failure events taking place at the microscopic level. Acoustic emission monitoring is used for estimating the rate of damage growth on a global scale and determining the size of individual failure events. Results show the important roles of the matrix material and the interphase in determining the tensile strength of unidirectional composite materials. Several failure modes occurring at the microscopic scale are revealed for the first time. Further, the results indicate that dynamic fracture participates to a significant extent in determining the failure process in these materials. Based on the results the influence of various parameters in determining the composite strength is described.
- Research Organization:
- Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (USA)
- OSTI ID:
- 5299657
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
Similar Records
Statistical aspects of the failure of brittle matrix composites, reinforced with unidirectional continuous, discontinuous and time dependent brittle fibers. Ph.D. Thesis
Acoustic emission and fiber damage in creep of a unidirectional SCS-6/Ti-15-3 metal matrix composite at 450 C
Related Subjects
42 ENGINEERING
COMPOSITE MATERIALS
FAILURES
FRACTURE PROPERTIES
FIBERS
TENSILE PROPERTIES
ACOUSTIC MONITORING
MATRIX MATERIALS
SCANNING ELECTRON MICROSCOPY
ELECTRON MICROSCOPY
MATERIALS
MECHANICAL PROPERTIES
MICROSCOPY
MONITORING
360603* - Materials- Properties
420500 - Engineering- Materials Testing