This study presents the free vibration analysis of a double tapered beam having linearly varying both thickness and width, by using finite element component mode synthesis methods. To determine natural frequency shape cracked beam, stiffness mass matrices have been obtained. The crack in is modeled as massless spring, divided into two subcomponents from section. spring has derived linear elasti...

The probability of an instant rail break, initiated at a single pre-existing foot crack due to severe wheel impact loading, is predicted using statistical methods and time-domain model for the simulation dynamic vehicle–track interaction. A linear elastic fracture mechanics approach employed calculate stress intensity in continuously welded subjected combined bending temperature loading. Based ...

This article reviews the current activities at Montanuniversität Leoben on design, processing, and characterization of 3D printed advanced ceramics using lithography-based manufacturing technology. An overview challenges opportunities offered to improve mechanical properties printing is given. Their brittle failure analyzed within framework linear elastic fracture mechanics, considering specifi...

The translaminar fracture toughness of laminated composites can be determined experimentally assuming either linear elastic mechanics (LEFM) or cohesive zone model (CZM) hypotheses. Each theoretical frame is different in terms complexity and predictive capabilities. To clarify the latter point, we derived R(Δa) J(ω) curves from a set published results on over-height compact tension specimens si...

The rupture in metals can occur by cleavage, where all process is controlled stresses, or ductile fracture, which takes into account the damage caused nucleation and growth of voids.The then dependent on stresses strains. Linear Elastic Fracture Mechanics, widely used engineering practice, based assumption that first prevails, occurs only under certain conditions. Consideration second fracture ...

An analysis of delamination for a thin elastic film, attached to a substrate a corner, is carried out. The film is in compression and the analysis is performed by combining results from fracture mechanics and the theory of thin shells. The results show a very strong dependency of the angle of the corner. In contrast with earlier results for delamination on a flat substrate, the present problem ...

The low Young's modulus of biological particles results in their large deformation against the AFM probe forces; therefore, it is necessary to study the contact mechanics of bioparticles in order to predict their mechanical behaviors. This paper specifically deals with the contact mechanics of DNA nanoparticles with spherical and cylindrical shapes during manipulation. In previous studies, ...

Recently published data for fracture in human humeral cortical bone are analyzed using cohesive-zone models to deal with the nonlinear processes of material failure. Such models represent the nonlinear deformation processes involved in fracture by cohesive tractions exerted by the failing material along a fracture process zone, rather than attributing all damage to a process occurring at a sing...

Problems in fracture mechanics are difficult when the appropriate analysis is unspecified, which very common most real-life situations. Finite element modeling thus demonstrated to be an essential technique overcome these problems. There currently various software tools available for problems, but they usually use, and obtaining accurate results not obvious task. This paper illustrates some pro...

An elastic-plastic model was developed to describe the deformation and permeability of fractured rocks under confining pressure. Elastic and elastic-plastic contact models were used in the model to analyze the deformations of a representative element containing a single fracture under various confining pressures. The present work utilized elements from contact mechanics and viscous flows to der...