Progressive fracture modes in a unidirectional brittle matrix composite under tension
- Nonmetallic Materials Division Air Force Materials Directorate, Wright-Patterson AFB, OH (United States)
- Univ. of Dayton Research Institute, Dayton, OH (United States)
In this work we augment the data set of our recent publication on progressive matrix microcrack initiation, which was accomplished under flexure, by conducting similar tests under direct tension. The new data supports completely that which was done earlier. We also provide an analysis to portray the statistical variation of the major controlling parameter in this phenomenon, i.e., the matrix fracture toughness, wherein sufficient data seem to be available to identify the {open_quotes}tails{close_quotes} of the distribution. We also examine the progression of fiber damage and observe the correlation between this mechanism and the composite stiffness degradation, where we again note significant departure from commonly-accepted concepts prevalent in the literature. Included are model results for the crack deflection problem and observations regarding the status of debonding criteria.
- OSTI ID:
- 175126
- Report Number(s):
- CONF-950686-; TRN: 95:006111-0035
- Resource Relation:
- Conference: Joint applied mechanics and materials summer meeting, Los Angeles, CA (United States), 28-30 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of AMD - MD `95: Summer conference; PB: 520 p.
- Country of Publication:
- United States
- Language:
- English
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