a theoretical solution is presented for the forced convection heat transfer of a viscoelastic fluid obeying the giesekus constitutive equation in a concentric annulus under steady state, laminar, and purely tangential flow. a relative rotational motion exists between the inner and the outer cylinders, which induces the flow. a constant temperature was set in both cylinders, in this study. the f...

Intervertebral disc (IVD) carries compressive loads and resists the tensile shear stress, produced during bending rotational movements. Hence, identifying its mechanical behavior has always encouraged researchers to propose various models for this tissue. Both viscoelastic hyperelastic have been observed regarding IVD. Therefore, study aims at mechanically characterizing tissue using existing h...

In this paper, the Ogden model is employed to characterize the hyperelastic properties of rubber, and on the basis of a pattern search algorithm and the Levenberg-Marquardt algorithm, a professional method that can realize the comprehensive fitting of the uniaxial tension, biaxial tension, planar tension, and simple shear experimental data of hyperelastic materials was developed. The experiment...

Yang Bai 1,†, Chunmei Liu 2,†, Guangyan Huang 1,†, Wei Li 1,† and Shunshan Feng 1,* 1 State Key Laboratory Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China; [email protected] (Y.B.); [email protected] (G.H.); [email protected] (W.L.) 2 First Research Institute of The Ministry of Public Security of PRC, Beijing 100048, China; [email protected] * ...

In this paper, natural frequencies and dynamic response of thick beams made of saturated porous materials resting on viscoelastic foundation are investigated for the first time. The beam is modeled using higher-order beam theory. Kelvin-voight model is used to model the viscoelastic foundation. Distribution of porosity along the thickness is considered in two different patterns, which are symme...

Semi-analytical solutions for vibration analysis of nonlocal piezoelectric Kirchhoff plates resting on viscoelastic foundation with arbitrary boundary conditions are derived by developing Galerkin strip distributed transfer function method. Based on the nonlocal elasticity theory for piezoelectric materials and Hamilton's principle, the governing equations of motion and boundary conditions are ...

Physics-based modeling provides a powerful tool for investigating the biomechanics of soft tissue deformation incorporated with knowledge of mechanical properties using appropriate boundary conditions. We have developed a physics-based atlas model with detailed anatomical information based on Cerefy Brain Atlas. A nonlinear hyper-viscoelastic mechanical property typically suited for neurosurger...

Complex interactions exist between cytokines, and the interleukin family plays a fundamental role in inflammation. Particularly circulating IL-1β, IL-6 and IL-8 are unregulated in systemic and chronic inflammatory conditions. Hypercoagulability is an important hallmark of inflammation, and these cytokines are critically involved in abnormal clot formation, erythrocyte pathology and platelet hyp...

In this paper, a new viscoelastic size-depended model developed based on a modified couple stress theory and the for nonlinear viscoelastic material in order to vibration analysis of a viscoelastic nanoplate. The material of the nanoplate is assumed to obey the Leaderman nonlinear constitutive relation and the von Kármán plate theory is employed to model the system. The viscous parts of the clas...