Sfoglia per Soggetto "FRACTURE"
Items 1-19 di 19
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The adhesive contact of a flat punch on a hyperelastic substrate subject to a pull-out force or a bending moment
(2011)In the last decade; instrumented macro- and nano-indentation tests have become useful tools for probing mechanical properties of materials. In this context, little in-depth work has been done for soft bio-materials like ... -
Analysis of Knoop indentation
(2011)Knoop indentation tests have long been a standard method for material characterization due to the fact that they provide an easy inexpensive non destructive and objective method of evaluating basic properties from small ... -
Analysis of Knoop indentation strain hardening effects
(2011)Knoop indentation tests are a standard method for material characterization due to the fact that they provide an easy, inexpensive non-destructive and objective method of evaluating basic properties from small volumes of ... -
Development of Strong Surfaces Using Functionally Graded Composites Inspired by Natural Teeth-A Theoretical Approach
(2010)In recent years functionally-graded composites have been proposed to develop strong surfaces that can withstand high contact and frictional forces. The present work presents a new graded composite that can be used for the ... -
Dipolar gradient elasticity of cables
(2012)The increasing structural use of cables and cable-systems has given rise to a substantial technical literature concerning their static and dynamic response. However, the majority of these works is based on classical ... -
Effects of temper condition and corrosion on the fatigue performance of a laser-welded Al-Cu-Mg-Ag (2139) alloy
(2010)The effects of temper condition and corrosion on the fatigue behavior of a laser beam welded Al-Cu-Mg-Ag alloy (2139) have been investigated. Natural aging (T3 temper) and artificial aging (T8 temper) have been applied ... -
Elastic and viscoelastic indentation of flat surfaces by pyramid indentors
(2006)The present work presents the results of frictionless and adhesionless contact of flat surfaces by pyramid indentors. The materials of the contacting solids were modelled as homogeneous and isotropic, linear elastic, as ... -
Finite element analysis of discrete edge dislocations: Configurational forces and conserved integrals
(2015)We present a finite element description of Volterra dislocations using a thermal analogue and the integral representation of dislocations through stresses in the context of linear elasticity. Several analytical results are ... -
Guided ultrasound wave propagation in intact and healing long bones
(2006)Ultrasonic evaluation of bone fracture healing has been traditionally based on the measurement of the propagation velocity of the first arriving signal (FAS). However, the FAS in general corresponds to a lateral wave that ... -
Head-to-head comparison of risedronate vs. teriparatide on bone turnover markers in women with postmenopausal osteoporosis: a randomised trial
(2008)Aims: We aimed to compare the effect of risedronate (RIS) and teriparatide (TPTD) (recombinant human parathyroid hormone 1-34) on bone turnover markers in women with postmenopausal osteoporosis. Methods: Forty-four Caucasian ... -
Hydrogen induced shear localization of the plastic flow in metals and alloys
(2001)Hydrogen enhanced localized plasticity (HELP) is a viable mechanism for hydrogen embrittlement supported by experimental observations. According to the HELP mechanism, hydrogen induced premature failures result from hydrogen ... -
Influence of nano-inclusions' grain boundaries on crack propagation modes in materials
(2011)The effect of nano-inclusions on materials strength and toughness has attracted great interest in recent years. It has been shown that tuning the morphological and microstructural features of materials can tailor their ... -
On the effect of hydrogen on plastic instabilities in metals
(2003)Experimental observations and theoretical calculations have demonstrated that hydrogen solute atoms increase the dislocation mobility in metals and alloys, thus promoting highly localized plastic processes which eventually ... -
Plane asymptotic crack-tip solutions in gradient elasticity
(2009)An asymptotic crack-tip solution under conditions of plane strain is developed for a material that obeys a special form of linear isotropic strain gradient elasticity. In particular, an elastic constitutive equation of the ... -
Plasma Serotonin and Markers of Bone Formation and Bone Resorption in Hemodialysis Patients
(2013)Introduction. Serotonin receptors are present in osteoblasts and osteoclasts, and serotonin affects bone metabolism. The association of plasma serotonin with markers of bone formation and bone resorption in hemodialysis ... -
Size effects on strength, toughness and fatigue crack growth of gradient elastic solids
(2008)The present study investigates the microstructural size effect on the strength of a bar under axial loading, and on the toughness and crack growth of a beam under three-point bending within the framework of strain gradient ... -
Some basic contact problems in couple stress elasticity
(2014)Indentation tests have long been a standard method for material characterization due to the fact that they provide an easy, inexpensive, non-destructive and objective method of evaluating basic properties from small volumes ... -
Three-dimensional finite element modeling of guided ultrasound wave propagation in intact and healing long bones
(2007)The use of guided waves has recently drawn significant interest in the ultrasonic characterization of bone aiming at supplementing the information provided by traditional velocity measurements. This work presents a ... -
Vascularized bone grafts from the palmar radius for the treatment of waist nonunions of the scaphoid
(2006)Purpose: With their intrinsic vascularity vascularized bone grafts provide an alternative solution to the challenging problem of scaphoid nonunions. The union rate (after imaging evaluation including magnetic resonance ...