Fracture toughness assessment of polypropylene random copolymer with multiple stress modes using the essential work of fracture theory |
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| Institution: | 1. National Engineering Research Center for Advanced Polymer Processing Technologies, Zhengzhou University, Zhengzhou 450002, People''s Republic of China;2. Wisconsin Institute for Discovery, University of Wisconsin-Madison, Madison, WI 53715, USA;3. Polymer Engineering Center, University of Wisconsin-Madison, Madison, WI 53706, USA;1. FEI University, Brazil;2. UFSCar, Brazil;1. Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic;2. Institute of Materials Science, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi, Viet Nam;1. School of Aeronautics and Astronautics, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai 200240, China;2. School of Materials, University of Manchester, Oxford Road, Manchester M13 9PL, UK;3. Henry Moseley X-Ray Imaging Facility, School of Materials, University of Manchester, Grosvenor Street, Manchester M13 9PL, UK;1. Department of Mechanics and Aerospace Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China;2. Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran;3. Department of Mechanical Engineering, Faculty of Engineering, University of Maragheh, Maragheh, Iran;1. Department of Polymer Processing, Iran Polymer and Petrochemical Institute, P.O. Box 14965/115, Tehran, Iran;2. Department of Chemical Engineering, CREPEC, École Polytechnique, CP 6079, Succ. Centre-ville, Montreal, Quebec H3C 3A7, Canada |
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| Abstract: | In recent years, the essential work of fracture (EWF) method has been extensively employed for assessing a material's toughness by specific essential fracture work, especially for polymers showing ductile failure. However, most research has studied either the in-plane stress mode or the out-of-plane stress mode. To obtain a more in-depth understanding of the EWF theory, the specific essential and non-essential fracture work of polypropylene random copolymer (PP-R) was investigated in both in-plane stress mode and out-of-plane stress mode. The effects of ligament length, amount of pre-cracking and pre-cracking method on the specific essential and non-essential fracture work were explored. The specific essential fracture work obtained in both stress modes is compared and discussed. |
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| Keywords: | Fracture toughness Essential work of fracture (EWF) Polypropylene Multiple stress fractures |
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