Accumulated Deformation of Sand with Initial Shear Stress and Effective Stress State Lying Near Failure Conditions

Influence of Rigidity, Irregularity and Initial Stress on Shear Waves Propagation in Multilayered Media

The propagation of shear waves in an anisotropic fluid saturated porous layer over a prestressed semi-infinite homogeneous elastic half-space lying under an elastic homogeneous layer with irregularity present at the interface with rigid boundary has been studied. The rectangular irregularity has been taken in the half-space. The dispersion equation for shear waves is derived by using the pertur...

تاثیر برنامه خودمدیریتی بر افسردگی، اضطراب و استرس بیماران سکته قلبی the effect of self management program on depression anxiety and stress of patients with myocardial infraction

چکیده : هدف :.این پژوهش با هدف تعیین تاثیر برنامه خودمدیریتی بر افسردگی، اضطراب و استرس بیماران سکته قلبی ا نجام شد. روش مطالعه : این پژوهش یک مطالعه تجربی دو گروهه ، قبل و بعد است که در سال 1389 در بیمارستان امام رضا (ع) کرمانشاه بر روی 60 مددجوی مبتلا به بیماری سکته قلبی ا نجام شد . نمونه ها به روش در دسترس جمع آوری و به روش بلوکهای تصادفی در دو گروه شاهد و آزمون تخصیص داده شدند . به مدت یک...

A method for assessing failure behavior of sand with initial static shear

The anisotropy of Leighton Buzzard sand under general stress conditions

A hollow cylinder apparatus was used to investigate the inherent anisotropy and membrane penetration of Leighton Buzzard sand test-specimens. The degree of inherent anisotropy was found to be independent of the mean effective stress but dependent on the initial relative density of the test-specimen. In the vertical-tohorizontal directions, the degree of inherent anisotropy decreases with increa...

Extensional deformation, stress relaxation and necking failure of viscoelastic filaments

We investigate the transient viscoelastic behavior of weakly strain-hardening fluids in filament stretching devices during uniaxial elongation and following the cessation of stretching. The numerical results are compared with experimental observations on a concentrated shear-thinning polystyrene solution which is well characterized by a multi-mode Giesekus model. The finite element computations...