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Keywords: creep
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Journal Articles
Article Type: Research Papers
J. Appl. Mech. May 2011, 78(3): 031002.
Published Online: February 1, 2011
...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...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. November 2010, 77(6): 061001.
Published Online: August 16, 2010
... 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...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. May 2010, 77(3): 031008.
Published Online: February 8, 2010
...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 in...
Journal Articles
Article Type: Research Papers
J. Appl. Mech. May 2008, 75(3): 031017.
Published Online: May 2, 2008
... 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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. March 2006, 73(2): 268–280.
Published Online: July 22, 2005
... 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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. January 2005, 72(1): 25–34.
Published Online: February 1, 2005
...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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. July 2005, 72(4): 570–580.
Published Online: October 29, 2004
...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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. July 2005, 72(4): 484–492.
Published Online: October 28, 2004
...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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. September 2003, 70(5): 625–632.
Published Online: October 10, 2003
... 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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. May 2003, 70(3): 359–363.
Published Online: June 11, 2003
... 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 of the...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. November 2002, 69(6): 819–824.
Published Online: October 31, 2002
... wave propagation friction creep piezoelectric materials 1 A Semi-infinite metal medium surface covered by a layer of piezoelectric material 2 Dispersion curves for a PZT 4 coupled structure 3 First mode shapes in a piezoelectric layer at wave number 0.1 4...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. November 2002, 69(6): 763–771.
Published Online: October 31, 2002
...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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. September 2002, 69(5): 580–588.
Published Online: August 16, 2002
... Solution of Integral Equations With Strongly Singular Kernels ,” Q. Appl. Math. , XLV , pp. 105 – 122 . Mahajan, R., 1991, “Crack Problems for an Elastic Film Bonded to an Orthotropic Substrate,” Ph.D. dissertation, Lehigh University, Bethlehem, PA. slip wave propagation creep elastic...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. July 2002, 69(4): 459–469.
Published Online: June 20, 2002
... thermal stresses viscoelasticity stress relaxation eigenvalues and eigenfunctions creep plastic deformation 1 Geometry of an element of a symmetric laminated plate 2 Initial damage envelope for the 0 / 90 2 / 0 ¯ s carbon/epoxy viscoelastic laminate...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. March 2002, 69(2): 148–153.
Published Online: August 6, 2001
...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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. December 2000, 67(4): 663–666.
Published Online: July 5, 2000
... 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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. March 2001, 68(2): 304–311.
Published Online: March 24, 2000
... 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. Also, an...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. June 2000, 67(2): 237–247.
Published Online: December 10, 1999
... proposed, 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...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. June 2000, 67(2): 372–382.
Published Online: October 5, 1999
...B. N. Nguyen, Postdoctoral Researcher; P. R. Onck, Postdoctoral Researcher; E. van der Giessen, Professor In view of the near-tip constraint effect imposed by the geometry and loading configuration, a creep fracture analysis based on C * only is generally not sufficient. This paper presents a...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. March 2000, 67(1): 193–196.
Published Online: June 8, 1999
...G. J. Rodin It is shown that the original continuum damage mechanics model of Kachanov is better suited for creep life analysis of creep-brittle solids and structures than continuum damage mechanics models that take into account damage-induced softening. [S0021-8936(00)03001-4...