A model material approach to the study of fracture process zone of quasi-brittle materials |
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Authors: | E. Jimenez Pique L. Dortmans G. de With |
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Affiliation: | (1) Laboratory of Solid State Chemistry and Materials Science, Eindhoven University of Technology, P.O. Box 513, 5600MB Eindhoven, The Netherlands;(2) TNO Institute of Applied Physics, P.O. Box 595, 5600 AN Eindhoven, The Netherlands |
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Abstract: | A new approach to study the fracture of quasi-brittle materials is introduced: the design and testing of model materials. By model material is understood a material with enlarged microstructure and which material parameters, such as stacking and mechanical properties of particles and cohesion force, can be fully controlled. In this paper a first example to the model materials approach is presented, consisting in 5 mm steel particles bonded in a precise stacking with an epoxy-based glue. It is shown how it is possible to correlate the different fracture mechanisms and ultimate peak load of the model material to the particle pair force and to the fracture process zone size. It is also seen how a quasi-brittle behaviour is produced in the presence of mechanisms that induced the crack to shift fracture planes, that is, in presence of energy dissipative mechanisms. |
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