نتایج جستجو برای: principal strain

تعداد نتایج: 339607  

Journal: :international clinical neurosciences journal 0
seifollah gholampour deptartment of bimedical engineering, north tehran branch, islamic azad university, tehran, iran nikoo soleimani m.sc. student of biomechanical engineering, department of biomedical engineering, north tehran branch, islamic azad university, tehran, iran. ali reza zalii shohada tajrish neurosurgical center of excellence, functional neurosurgery research center, shohada tajrish hospital, shahid beheshti university of medical sciences, tehran, iran. fateme zare karizi m.sc. student of biomechanical engineering, department of biomedical engineering, north tehran branch, islamic azad university, tehran, iran. afsoun seddighi shohada tajrish neurosurgical center of excellence, functional neurosurgery research center, shohada tajrish hospital, shahid beheshti university of medical sciences, tehran, iran

background: cervical spine sustains most of thevertebral column injuries, among other injuries, the disc degeneration and damage that lead to replacement of the damaged disc with cage or artificial disc. methods: the c4 to c6 vertebrae of a normal subject and a person with interbody fusion cage were 3d modelled and then analyzed using finite element method. the results of maximum stress and str...

The existing failure criteria to evaluate discontinuous rocks are predominatly based on the relations between principal stresses at failure. None of the criteria has a direct reference to the magnitude of deformation as a major parameter in rock Several reasons are identified indicating that the selection of peak stress as a major parameter, which is obtained through the evaluation of a failure...

Journal: :Journal of Mathematical Analysis and Applications 2001

Journal: :international journal of civil engineering 0
seyed amirodin sadrnejad k.n.toosi university of tech hamid karimpour the catholic university of american

the present paper is devoted to a new critical state based plasticity model able to predict drained and undrained behaviour of granular material. it incorporates a bounding surface plasticity model describing in multilaminate framework to capitalize on advantages of this mathematical framework. most of the models developed using stress/strain invariants are not capable of identifying the parame...

Journal: :Ultrasonics 2009
Hao Chen Tomy Varghese

Shear stresses are always present during quasi-static strain imaging, since tissue slippage occurs along the lateral and elevational directions during an axial deformation. Shear stress components along the axial deformation axes add to the axial deformation while perpendicular components introduce both lateral and elevational rigid motion and deformation artifacts into the estimated axial and ...

Journal: :Journal of Japan Institute of Light Metals 2015

Journal: Geopersia 2017

Finite strain and vorticity analyses were carried out in the deformed conglomerate and micro-conglomerate of Goushti shear zone in the Sanandaj-Sirjan metamorphic belt (Zagros Mountains Iran). These deformed rocks are bounded between two NE and SW major thrust faults. Finite strain measurements on three principal planes of strain ellipsoid show the higher amounts of strain ratios near the major...

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