In this paper, three-dimensional modeling of the fatigue crack growth profiles was performed in a simple riveted lap joint. Simulation results showed that mode I was dominated on the one side of the plates and the crack straightly grew on this side, while the other side of the plates was in a mixed-mode condition and the crack propagation path was not straight on this side. Afterward, the fract...

This paper describes the testing of laser deep penetration processing on controlled fragmentation high carbon steel (50SiMnVB). The objective this research is to make use defects in zones and optimize quality prefabricated cracks. shows that a deeper central crack appear zone when heat input 60 J/mm, appeared affected by martensite microstructure, microhardness magnitude tensile stress. Further...

Background: A theoretical study was performed of mode II delamination in a multilayered functionally graded beam configuration with considering the material non-linearity. Methods: The fracture was analysed by the J-integral approach. Two laws (quadratic and exponential) for variation of the modulus of elasticity along the beam height were applied. The J-integral closed form non-linear analytic...

Objectives The present study investigated the effect of cements on fracture resistance of monolithic zirconia crowns in relation to their compressive strength. Materials and methods Four different cements were tested: zinc phosphate cement (ZPC), glass-ionomer cement (GIC), self-adhesive resin-based cement (SRC) and resin-based cement (RC). RC was used in both dual cure mode (RC-D) and chemical...

BACKGROUND The aim of the study is to evaluate the resistance vertical root fracture (VRF) of mineral trioxide aggregate (MTA) filled-immature permanent roots by using three different vehicles. MATERIAL AND METHODS Forty-extracted human single-rooted mandibular premolars were selected and the root length was standardized to the length of 9 mm. For simulation of immature tooth apices, peeso re...

PURPOSE The purpose of this study was to compare the efficacy of two imaging modes in a cone beam computed tomography (CBCT) system in detecting root fracture in endodontically-treated teeth with fiber posts or screw posts by selecting two fields of view. MATERIALS AND METHODS In this study, 78 endodontically-treated single canal premolars were included. A post space was created in all of the...

Recent studies document linear elastic response of muddy marine sediments to load and deformation on temporal and spatial scales relevant to animal movement, with burrowers making openings for movement in such sediments by fracture. Cracks propagate through linear elastic solids in mode I (opening-mode crack growth) when the stress intensity factor (KI) at the crack tip exceeds the material’s f...

The adhesive fracture resistance of structural joints in mode II,

1. Atrial oversensing due to lead integrity failure (fracture, insulation failure) or connector problems between the header and the lead. 2. Atrial lead displacement: no evidence of microor macrodisplacement was found on chest radiography. 3. Asynchronous mode of pacing (VOO) due to magnet or programming: device interrogation ruled out this differential diagnosis. The device was fully functiona...

New ceramic materials, like hot-pressed glass ceramics can be used to achieve monolithic full anatomic all-ceramic dental restorations even in the molar areas. Due to the fact that these materials are brittle and susceptible to fracture, the aim of the study was to reveal the fracture behaviour of hot-pressed glass ceramic molar crowns under different loading methods. For the experimental analy...