Fracture characteristics of vinylester resin under impact fatigue

The impact fatigue behavior of a vinylester resin was studied with a pendulum‐type repeated‐impact tester especially designed and fabricated for the determination of single‐impact and repeated‐impact strengths. A well‐defined energy–endurance impact fatigue curve was obtained with a progressive endu...

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Veröffentlicht in:Journal of applied polymer science 2002-11, Vol.86 (8), p.1995-2001
Hauptverfasser: Ray, Dipa, Sarkar, B. K., Bose, N. R.
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container_end_page 2001
container_issue 8
container_start_page 1995
container_title Journal of applied polymer science
container_volume 86
creator Ray, Dipa
Sarkar, B. K.
Bose, N. R.
description The impact fatigue behavior of a vinylester resin was studied with a pendulum‐type repeated‐impact tester especially designed and fabricated for the determination of single‐impact and repeated‐impact strengths. A well‐defined energy–endurance impact fatigue curve was obtained with a progressive endurance at values of the impact energy below the critical value, with the endurance limit set at an energy level of 31 N mm, 17.4% of the single‐impact energy. The nature of the crack propagation was investigated for a single impact as well as high, medium, and low impact energy levels with progressively longer endurance. The fracture characteristics varied with the impact energy imparted and the number of cycles endured. The rate of lip growth was high at the higher impact energy levels with a lower number of endurance cycles and low at the lower impact energy levels with longer endurance; the repeated impacts created large and small compressive zones through the bending of specimens with the development of long and short lips, respectively. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 1995–2001, 2002
doi_str_mv 10.1002/app.11131
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source Wiley Online Library Journals
subjects Applied sciences
Exact sciences and technology
fatigue analysis
fracture
Mechanical properties
Physical properties
Polymer industry, paints, wood
Properties and testing
resins
Technology of polymers
title Fracture characteristics of vinylester resin under impact fatigue
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