Statistical modeling of crack growth and reliability assessment of high-density polyethylene

Journal Article · Tue Jun 01 00:00:00 EDT 1999 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1361/105994999770346909· OSTI ID:364021

Qureshi, F S ^[1]; Sheikh, A K; Khan, Z; Ahmad, M ^[2]

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1. Lubrizol Corp., Wickliffe, OH (United States)
2. King Fahd Univ. of Petroleum and Minerals, Dhahran (Saudi Arabia). Mechanical Engineering Dept.

In this work, a statistical evaluation of the crack-growth process in high-density polyethylene (HDPE) was carried out. The specimens were compression molded from virgin, molding-grade HDPE. Edge-notched specimens for replicate fatigue testing were prepared from compression-molded sheets. Fatigue test results were then analyzed, and it is shown that if the crack-growth process can be characterized as a random process following a power-law-type behavior, then the time to reach a critical crack length will be distributed according to an inverted lognormal model.

• OSTI ID: 364021
• Journal Information: Journal of Materials Engineering and Performance, Vol. 8, Issue 3; Other Information: PBD: Jun 1999
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FRACTURE PROPERTIES
POLYETHYLENES
STATISTICAL MODELS
SAMPLE PREPARATION
NOTCHES
FATIGUE
CRACK PROPAGATION
RELIABILITY