Mixed mode I/II fracture investigation of Perspex based on the averaged strain energy density criterion |
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| Authors: | M R M Aliha F Berto A Bahmani P Gallo |
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| Institution: | 1.Welding and Joining Research Center, School of Industrial Engineering,Iran University of Science and Technology,Narmak, Tehran,Iran;2.Department of Management and Engineering,University of Padova,Vicenza,Italy;3.Department of Engineering Design and Materials,Norwegian University of Science and Technology,Trondheim,Norway;4.Department of Mechanical and Mechatronics Engineering,University of Waterloo,Waterloo,Canada;5.Department of Mechanical Engineering,Aalto University,Espoo,Finland |
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| Abstract: | In this work, some recent mixed mode I/II fracture toughness results obtained from Perspex (or polymethylmethacrylate (PMMA)) with four simple cracked specimens subjected to the conventional three-point bend loading are reanalysed based on local energy concept. Although all the mentioned samples have been tested under the same and similar mode mixities, different fracture toughness envelopes were obtained for mixed mode I/II fracture of PMMA. The averaged strain energy density (SED) criterion has been applied in the past for different types of notched specimens (including U, V, O and keyhole notches). It is shown that the mixed mode tensile-in plane shear fracture toughness data obtained from the semicircular and triangular crack type specimens are successfully predicted for sharp cracked PMMA samples using the SED criterion. |
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