3. The tensile strength of polymethyl methacrylate (PMMA) is about 65 MPa. This assumes the sample has perfect quality (
Posted: Fri Jul 08, 2022 6:09 am
3. The tensile strength of polymethyl methacrylate (PMMA) is about 65 MPa. This assumes the sample has perfect quality (no flaws). Calculate the tensile stress required to fail a tensile coupon that has a 0.5 mm crack on one side (see illustration below). Use the single edge notch plate model to calculate the geometric factor (Y). Assume the fracture toughness of PMMA is 1 MPa m¹/2 O 12.5 mm b 0.5 mm crack