The fracture toughness of SLG filled phenolic composites have been determined by short bar tests. It is expensive to prepare the samples for the tests. Therefore, it is necessary to develop a mathematical model that will predict the fracture toughness of particulate filled phenolic composites. Mathematical models for tensile strength, Young’s modulus are available but not for impact strength an...

Studies of bone have determined multiple toughening mechanisms slowing the propagation of a crack. These toughening mechanisms contribute to the fracture toughness of bone in life, making their activities of clinical interest. The primary standard methods for measuring bone fracture toughness use a single-notched compact type specimen (CT) or single-notched bending specimens in four-point (SN4P...

Purpose: The mechanical strength of polymethyl methacrylate (PMMA) remains far from ideal for maintaining the longevity of denture. The purpose of this study was to evaluate the effect of Zirconium oxide (ZrO2) nanofillers powder with different concentration (1.5%, 3%, 5% and 7%) on the flexural strength, fracture toughness, and hardness of heat-polymerized acrylic resin. Materials and methods:...

Mode I fracture toughness (KIC) is an intrinsic material property that quantifies its resistance to tensile propagation. The International Society for Rock Mechanics has endorsed four methods determine the KIC of rock, namely, short rod, chevron bend, cracked notched Brazilian disc, and semi-circular bend (SCB) methods. In this study, we compare results SCB technique with those recently propose...

The effect of a biaxial load on brittle fractures solids under predominantly elastic deformation and mode I loading conditions is studied in this article. A cross-shaped specimen used work, the variation T-stress achieved by changing applied to arm parallel crack. In tests, series different loads crack, values perpendicular crack are obtained, stress intensity factor calculated FEM (Finite Elem...