Equi-biaxial fatigue testing of EPM utilising bubble inflation

详细信息    查看全文

• 作者：Mark Johnson ; ^{mark.johnson@mydit.ie" class="auth_mail" title="E-mail the corresponding author} ; Niall Murphy ; Ray Ekins ; John Hanley ; Stephen Jerrams
• 关键词：Equi-biaxial ; Bubble inflation ; Fatigue ; Vision system ; Ethylene-propylene
• 刊名：Polymer Testing
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：53
• 期：Complete
• 页码：122-131
• 全文大小：2732 K

文摘

This paper describes an equi-biaxial tension fatigue test system which utilises the bubble inflation method to subject elastomers to equi-biaxial fatigue loading between user-defined limits of pressure, volume, stretch ratio or stress. The test system integrates a hydraulic inflation system, a high speed vision system and a control system. The high-speed vision system allows the stretch ratio and stress acting on the test specimen to be evaluated in real-time during testing. This in turn allows either stretch ratio or stress to be used as a direct control limit. In this research, constant maximum engineering stress control tests have been carried out to evaluate the suitability of the developed dynamic bubble inflation system for equi-biaxial fatigue testing of elastomers. The resulting test data was used to produce Wöhler (S/N) curves and stress/stretch ratio plots for ethylene-propylene rubber (EPM).