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
Descriptors:
- *Materials
- *Metals
- *Viscoelasticity
- *Cracks
- *Crack propagation
- Caustics
- Optics
- Stress concentration
- Deformation
- Creep
- Numerical analysis
- Equations
- Fracture(Mechanics)
- Dynamic loads
- Dynamics
- Sensitivity
- Temperature
- Brittleness
- Explosives
- Solid rocket propellants
- Experimental data
- Refractory metals
- J integrals
- Steady state
- Graphs
- Symposia