.... The primary aim of this study is to identify the nature of such mechanisms by constructing Bree type interaction diagrams for idealized double-wall systems under cyclic thermomechanical loading that shows the combination of loading conditions for which cyclic plasticity (leading to fatigue failure)-creep...

... showed no significant size dependence, size effects inherent in the nanoindentation creep response were observed and utilized to investigate the deformation mechanism of each material. Supplemented by computational chemo-mechanical modeling, we found that lithiated Ge creeps through a stress-gradient...

...Yaoting Zhu; Lu Sun; Huilin Xu A numerical method for directly obtaining discrete relaxation modulus from static creep tests data is developed for linear viscoelastic asphalt mixtures. To overcome the ill-posedness of interconversion between creep compliance and relaxation modulus, Volterra...

... wheelsets. The creep forces and the flange forces between the oscillating wheels and the rails are main nonlinearities and can be estimated by the Vermeulen–Johnson creep force laws and a piecewise linear function, respectively. The dynamical equations for the motion of the vehicle running with constant...

...R. C. Koeller The purpose of this paper is to suggest a linear theory of materials with memory, which gives a description for the similarities resulting when the various analytical and experimental methods used to reduce the creep and relaxation data are imposed on the observational changes...

... knowledge of the mechanical behavior of these materials, e.g., the long term viscoelastic (creep/relaxation) behavior of the carbon cathode. In this present paper, a three-dimensional viscoelastic model is devised and proposed, being ready to be implemented in a finite element code. This 3D viscoelastic...

... the relaxation response through the time dependent stress and interface separation∕slip magnitude. When the matrix is an n th -order generalized Kelvin model in shear creep, a pair of nonlinear n th -order differential equations is obtained governing the creep response through the time dependent strain...

...Lingyuan Kong, Research Assistant; Robert G. Parker, Mem. ASME Steady state analysis of a two-pulley belt drive is conducted where the belt is modeled as a moving Euler-Bernoulli beam with bending stiffness. Other factors in the classical creep theory, such as elastic extension and Coulomb friction...

...Michael J. Leamy A perturbation method is presented for use in analyzing unsteady belt-drive operation. The method relies on the important assumption that for operating states close to steady operation, the friction state (i.e., whether the belt is creeping or sticking at any location on the pulley...

...D. N. Robinson; W. K. Binienda A creep damage model is presented that allows for anisotropic distributions of damage in composite materials. An earlier model by the writers allowed for anisotropic damage growth rate but, based on a scalar state variable, failed to account for anisotropic...

..., and is determined via a stress-based failure criterion. The problem is reduced to a set of ordinary differential equations whose form changes depending on whether or not shedding has initiated. Numerical treatment shows a substantial increase in creep rate due to oxide shedding. Contributed by the Applied...

... remains valid for a linearly isotropic viscoelastic functionally graded material with separable relaxation (or creep) functions in space and time. This paper revisits this issue by addressing some subtle points regarding this result and examines the reasons behind the success or failure...

... itself in the ASME JOURNAL OF APPLIED MECHANICS . 27 Apr 2001 17 Dec 2001 31 10 2002 wave propagation friction creep piezoelectric materials Wave propagation and vibration in a pure piezoelectric medium have received considerable attention ( 1 2 3 4 ). In order...

...M. J. Leamy; T. M. Wasfy An analysis of the frictional mechanics of a steadily rotating belt drive is carried out using a physically appropriate creep-rate-dependent friction law. Unlike in belt-drive mechanics analyzed using a Coulomb friction law, the current analysis predicts no adhesion zones...

... final publication of the paper itself in the ASME JOURNAL OF APPLIED MECHANICS . 02 Apr 2001 14 Nov 2001 16 08 2002 slip wave propagation creep elastic moduli crack-edge stress field analysis perturbation theory crazing sliding friction Graded materials, also...

... eigenvalues and eigenfunctions creep plastic deformation Analysis of the effect of fiber prestress release on overall response, local fields, and damage resistance of composite laminates is a relatively new subject that has been examined in several recent publications ( 1 2 3 4 ). Typically...

...K. V. Spiliopoulos, Associate Professor, Simplified methods have been developed to find the long-term cyclic state of stress for structures that exhibit inelastic creep and are subjected to a short period cyclic loading. In the present work a new simplified method is presented which may be applied...

... and experimental measurements show that the model exhibits excellent quantitative agreement at all experimental stress-relative density states and significantly smoothes the experimental input data. It is anticipated that design engineers will use the present method to accurately predict the creep strain histories...

... the concept of damage surfaces. This work is motivated by experimental observations of the response of swirl-mat and random chopped fiber mat polymeric composites where viscoelastic creep was accompanied by a multitude of fiber/matrix interfacial cracks. Contributed by the Applied Mechanics Division...

..., in which the wall consists of a viscous material with a locally linear relation between mean stress and creep (growth) rate. The result is that the elliptical shape for stable growth can be regulated by one parameter of viscosity. The results reinforce the suggestion that the stability of the surface...