On the role of the process zone in dynamic fracture |
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| Affiliation: | 1. Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, PR China;2. Key Laboratory of Stucture and Functional Regulation of Hybrid Materials, Anhui University, Ministry of Education, Heifei, 230601, PR China;3. Institute of Applied Physics, PLA Army Academy of Artillery & Air Defense, Hefei, 230031, PR China;1. Department of Materials Science and Engineering, Clemson University, Clemson, SC 29634, USA;2. Department of Electrical and Computer Engineering, Clemson University, Clemson, SC 29634, USA;3. COMSET - Center for Optical Materials Science and Engineering Technologies, Clemson University, Anderson, SC 29635, USA;4. School of Physics and Electrical Technology, Yancheng Teachers University, Yancheng, Jiangsu 224002, China;5. School of Material Science and Engineering, Jiangsu University, No. 301 Xuefu Road, Zhenjiang 212013, PR China;1. Microsoft, One Microsoft Way, Redmond, WA 98052, United States;2. Mechanical and Aerospace Engineering Department, Case Western Reserve University, Cleveland, OH 44106, United States;1. Refractory and Ceramic Materials Department., Central Metallurgical Research and Development Institute, CMRDI, P.O. Box: 87 Helwan, 11421 Helwan, Egypt;2. Material Science and Engineering Group, Chemistry Department, Faculty of Science, Taif University, P.O. Box: 888 Al-Haweiah, Taif, Saudi Arabia;3. Materials Science and Engineering, Clemson University, Clemson, SC, United States |
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| Abstract: | The evolution of the fracture process zone and its influence on dynamic crack propagation are investigated using a simple constitutive assumption to model the material in the fracture process zone. The mode III problem of anti-plane shear is examined using a finite difference scheme to obtain the full field solution. Unlike the classical approach of determining the steady state solutions for imposed constant speed of crack propagation, here the fracture criterion is imposed along with the formulation of the boundary-initial value problem and the coupled equations are solved numerically to determine the generation and growth of the fracture process zone as well as the crack tip. The results of the simulation indicate that the constitutive behavior of the process zone material (or equivalently the evolution of the process zone itself) plays a key role in determining the dynamics of fast fracture. |
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