Fatigue testing of high-density polyethylene and polycarbonate with crack length measurement using image processing techniques

Journal Article · Thu Sep 01 00:00:00 EDT 1994 · Journal of Testing and Evaluation; (United States)

OSTI ID:6995844

Riemslag, A C ^[1]

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1. Delft Univ. of Technology (Netherlands). Lab. of Materials Science

A new automated method of measuring fatigue cracks in polymers is discussed. The new method is based on a video signal of the crack which is analyzed with image processing techniques. With this technique the crack length is measured every 20 s during a fatigue test. The accuracy of one single measurement is about 0.05 mm, but this can be increased by averaging a large number of measurements. The applied automated data collection and subsequent data processing is discussed in relation to the recommendations given in ASTM E 647, Test method for Measurement of Fatigue Crack Growth Rates. The use of the new technique is illustrated on the basis of fatigue tests performed on transparent polycarbonate (PC) and nontransparent polyethylene (PE). The fatigue behavior of PE and PC is briefly discussed.

• OSTI ID: 6995844
• Journal Information: Journal of Testing and Evaluation; (United States), Vol. 22:5; ISSN 0090-3973
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
POLYCARBONATES
FATIGUE
MECHANICAL TESTS
POLYETHYLENES
CRACK PROPAGATION
CRACKS
DATA ACQUISITION
MEASURING METHODS
CARBON COMPOUNDS
CARBONATES
MATERIALS TESTING
MECHANICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
POLYMERS
POLYOLEFINS
TESTING
360603* - Materials- Properties
420500 - Engineering- Materials Testing