ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The applicability of fracture mechanics to the description of initial notch extension under tension in quasi-isotropic fiberglass laminates is tested experimentally. It is found that classical elastic fracture mechanics, without modifications of couple stress effects, as represented in the theory of Muki and Sternberg, is sufficient to describe initial notch extension in prenotched specimens which are sufficiently thick to avoid transplanar bucklings of the specimen under tension. The fracture toughness (KIC) is found to be 15 ksi √in. However, it is noted that in these specimens (0.035 in. thick) transplanar postbuckling deformation becomes pronounced well before fracture, and that different modes of buckling seen in externally notched and internally notched specimens have opposite effects on the apparent fracture toughness of the specimen. It is pointed out that the effect of transplanar buckling on fracture of fiber glass, with its high compliance and high strength, is a potential source of serious problems in design with this material.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760130104
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