Journal
ENGINEERING FRACTURE MECHANICS
Volume 102, Issue -, Pages 271-287Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2013.02.011
Keywords
Torsion; Brittle failure; Notched components; Strain energy density
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Funding
- Italian Research Program [CPDA100715]
- PRIN project [2009Z55NWC_001]
- Spanish Ministerio de Economia y Competitividad [BIA2011-24445]
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This paper presents seventy new experimental results from PMMA notched specimens tested under torsion at -60 degrees C. The notch root radius ranges from 0.025 to 7.0 mm. At this temperature the non-linear effects previously observed on specimens of the same material tested at room temperature strongly reduce. The averaged value of the strain energy density over a control volume is used to assess the critical loads to failure. The radius of the control volume and the critical strain energy density are evaluated a priori by using in combination the mode III critical stress intensity factor from cracked-like specimens and the critical stress to failure detected from semicircular notches with a large notch root radius. (C) 2013 Elsevier Ltd. All rights reserved.
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