Abstract In this work, an elastic-damage evolution analysis is carried out for a cylinder under torsion made of material obeying gradient damage model with softening. Both semi-analytical and asymptotic approaches are developed to analyze the elastic, axisymmetric bifurcation stages. We show existence fundamental branch where field asymmetric localized within finite thickness from boundary. By ...

Torsion and infarction of the greater omentum are two rare clinical situations which present as an acute abdomen. Nevertheless, knowledge concerning these two problems can help the surgeon in proper diagnosis and treatment. Since the first report on primary torsion by Eitel in 1899, a few hundred more have been reported and some collective reviews published to date. In this study we will p...

Jaw couplings have become an indispensable part for industrial applications. Besides the compensation of radial, axial and angular misalignments, they are crucial reduction torque shocks in drive systems. However, due to complex material behavior elastic gear rim, which is typically made thermoplastic polyurethane (TPU), there few numerical models describe jaw couplings. In present work, rim ob...

This paper studies the multiaxial fatigue behaviour of maraging steel samples produced by selective laser melting. Hollow cylindrical specimens with transverse circular holes are subjected to different in-phase bending-torsion loading scenarios. Fatigue crack initiation sites and angles predicted from first principal stress field. lifetime is computed using a straightforward approach, based on ...

A teleparallel geometrical description of the nematic phases of liquid crystals is proposed.In the case of the twisted geometry of nematics Cartan torsion is given by a spatial helical form which depends on the twist angle. Geodesics of a test particle around the teleparallel liquid crystal are given. PACS numbers : 0420,0450 Departamento de F́ısica Teórica Instituto de F́ısica UERJ Rua São Fco. ...

background: testicular torsion is a medical emergency with catastrophic sequelae that deserves the same treatment considerations and concerted efforts in research as any other complicated medical condition. the aim of this study was to investigate the effect of pausinystalia macroceras (pm) bark extract on sperm quality and serum testosterone levels in testicular torsion in a rat model. methods...

The purpose of this paper is to demonstrate the applicability Particle Swarm Optimization algorithm determine material parameters in incompressible isotropic elastic strain-energy functions using combined tension and torsion loading. Simulation rubber behavior was conducted from governing equations deformation a cylinder composed hyperelastic materials. Four different forms function were consid...

This study studies the torsional capacity of rectangular ultra-high-performance-concrete (UHPC) beams. Nine UHPC beams were tested under pure torsion load. The failure modes presented and influences parameters, including reinforcement ratio, stirrup ratio steel fiber content discussed. experimental results showed that longitudinal had little effect on crack width plastic stiffness in serviceabi...

  Torsion of the gallbladder is a relatively rare surgical disease which mimics acute cholecystitis' symptoms that usually would not be respondable to medical therapies. The torsion would mostly be diagnosed intra-operatively. Cholecystectomy is the treatment of choice. In general in our centre, General Surgery department, Imam Reza hospital, Mashhad, Iran, since 1986 over 14000 cholecystect...