Investigation of stress concentrations in laser-cut polymethylmethacrylate (PMMA) material under static and centripetal loading

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Stress concentrations play an important role in determining the strength, durability and functionality of structural components. A number of studies have looked at how resultant stress concentrations of laser cutting different polymeric materials can have a detrimental effect on finished parts in terms of their functionality and durability. Recently student projects at the University experienced issues with uncertainty in stress concentrations from laser cutting of polymeric materials. This study looks at conventional tensile testing to evaluate polymers such as PMMA and additive manufacturing materials subjected to tensile testing, varying the presence of fillet radii on section changes, and compare the findings to finite element analysis (FEA) models. In addition, parts will be used in dynamic testing to compare the effects of dynamic loading on the same specimens to that of standard tensile testing. The initial testing will avoid the effects of impulse on specimens but allow comparisons to be drawn between standard testing techniques, dynamic testing using a motor hub and FEA results, which will help guide future student projects.
Original languageEnglish
Pages (from-to)648-653
Number of pages6
JournalInternational Research Journal of Engineering and Technology
Issue number9
Publication statusPublished - 1 Sept 2023

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