Accession Number:

ADP003115

Title:

Viscoelastic Effect on Dynamic Crack Propagation in Homalite 100,

Descriptive Note:

Corporate Author:

ILLINOIS UNIV AT URBANA DEPT OF THEORETICAL AND APPLIED MECHANICS

Personal Author(s):

Report Date:

1983-10-01

Pagination or Media Count:

21.0

Abstract:

The optical method of caustics is used to determine the stress intensity factor for a running crack in a viscoelastic material. A formulation of the quasi-static deformation of materials with rheologically simple shadow-optic creep functions is derived for the caustics, solved numerically and applied to the fracture testing of Homalite-100 at various temperatures 40 deg C - 100 deg C. Theoretical and experimental caustics show good agreement in shape even for moderately high crack speeds 150 - 300 msec. Results also show that the relation between the stress intensity factor and the crack speed for Homalite 100 is highly sensitive to temperature variations. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE