Theory for accelerated slow crack propagation in polyethylene fuel pipes. Annual report, 1985-1986
This report describes results along two major directions in efforts to develop a theory for accelerated test of polyethylene (PE) fuel pipe. The entire history of accelerated, stable, brittle crack-propagation behavior was reproducibly observed in PE 2306-II pipe specimens. Residual stresses together with morphological gradients exhibit striking influence on crack propagation within the pipe wall. The Crack Layer theory was employed to describe the crack propagation behavior in high-density polyethylene (HDPE) which is used as a model material. The specific enthalpy of damage, a material parameter reflecting its resistance to fracture, was calculated from both creep and fatigue crack-propagation experiments to be on the order of 10 cal/g.
- Research Organization:
- Case Western Reserve Univ., Cleveland, OH (USA)
- OSTI ID:
- 6974924
- Report Number(s):
- PB-90-178781/XAB
- Resource Relation:
- Other Information: See also PB--86-136454
- Country of Publication:
- United States
- Language:
- English
Similar Records
Theory for accelerated slow crack propagation in polyethylene fuel pipes. Annual report, 1987-1988
Theory for accelerated slow crack propagation in polyethylene fuel pipes. Final report, April 1984-March 1987
Related Subjects
36 MATERIALS SCIENCE
NATURAL GAS
TRANSPORT
PIPELINES
CRACK PROPAGATION
POLYETHYLENES
CREEP
DAMAGE
ENTHALPY
FRACTURE MECHANICS
GRAPHS
MICROSTRUCTURE
PIPES
PROGRESS REPORT
RESIDUAL STRESSES
STRAIN GAGES
TESTING
CRYSTAL STRUCTURE
DOCUMENT TYPES
ENERGY SOURCES
FLUIDS
FOSSIL FUELS
FUEL GAS
FUELS
GAS FUELS
GASES
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYMERS
POLYOLEFINS
STRESSES
THERMODYNAMIC PROPERTIES
032000* - Natural Gas- Transport
Handling
& Storage
360603 - Materials- Properties