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Keywords: hardening
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Journal Articles
Article Type: Research Papers
J. Appl. Mech. January 2011, 78(1): 011012.
Published Online: October 20, 2010
... constitutive model that incorporates film thickness and grain size effects as well as dislocation entanglement hardening. The experimental and simulation results are compared at both the film and subgrain scales. While the experiment and model agree fairly well at the film level, the experimental results show...
Journal Articles
Article Type: Technical Briefs
J. Appl. Mech. January 2011, 78(1): 014505.
Published Online: October 20, 2010
... and reversed loading tests indicate isotropic hardening. Final failure in shear is by microvoid coalescence within the sandwich layer with a void spacing comparable to the layer thickness. The significance of the results for strain gradient plasticity theory is discussed. 16 02 2010 09 04 2010 23...
Journal Articles
Article Type: Technical Briefs
J. Appl. Mech. May 2010, 77(3): 034502.
Published Online: February 4, 2010
... variation with respect to plastic strain and it can be identified with a quantitative evaluation of the parameters D cr , D o , p th , p cr and also the hardening parameter, which defines the real stress-strain curve. The effects of axial and shear forces...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. November 2007, 74(6): 1264–1275.
Published Online: April 10, 2007
... with nonlinear isotropic-kinematic hardening under the plane strain condition. For sensitivity analysis, process effects such as the amount of bending curvature, normalized back force and friction, as well as material property effects such as hardening behavior including the Bauschinger effect and yield surface...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. November 2006, 73(6): 1039–1044.
Published Online: April 6, 2006
...-known MRS Lade model whereby the suction and the effective stress tensor are introduced as additional independent and dependent stress components, respectively. Consequently the cap and cone yield conditions of the MRS Lade model both in hardening and softening as well as the internal evolution laws...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. November 2006, 73(6): 1026–1030.
Published Online: April 6, 2006
... in the coordinates of Mohr. The results in this work demonstrate the capability of thermodynamically consistent gradient-dependent elastoplastic model formulations to suppress the localized failure modes of the classical plasticity that take place when the hardening/softening modulus H ¯ equals the critical value...
Journal Articles
Article Type: Brief Notes
J. Appl. Mech. January 2005, 72(1): 149–152.
Published Online: February 1, 2005
... the hardening parameters that characterize the material response. The simulation of the deformation process during the whole test is performed with a finite element large strain elastoplasticity-based formulation. The results of the simulation show that the mechanical characterization involving the classical...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. November 2004, 71(6): 796–804.
Published Online: January 27, 2005
... work by the authors. This paper extends the isotropic hyperelastic VIB model to ductile materials by incorporating rate effects and hardening behavior of the material into a finite deformation framework. The hyperelastic VIB model is formulated in the intermediate configuration of the multiplicative...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. July 2004, 71(4): 521–531.
Published Online: September 7, 2004
... spin, and an evolution law of isotropic hardening. In this investigation, the proper analytical form and the associated parameter identification of the anisotropic material functions defining the flow rule of macroscopic plastic spin are discussed for sheet metals with persistent but rotated...
Journal Articles
Article Type: Brief Notes
J. Appl. Mech. March 2004, 71(2): 283–285.
Published Online: May 5, 2004
... hardening softening This short note does not contain new results about localization, but a new and simpler way to present them. Specifically, this note presents an alternative procedure to demonstrate the localization criterion. Originally, the localization analysis was expressed in terms...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. November 2003, 70(6): 799–808.
Published Online: January 5, 2004
...-strain law with isotropic hardening. These assumptions lead to a local nonlinear moment-curvature relation identical to that developed by Liu et al. When inserted into the exact equation for moment equilibrium, this constitutive relation yields a second-order, nonlinear ordinary differential equation...
Journal Articles
Article Type: Brief Notes
J. Appl. Mech. July 2003, 70(4): 611–612.
Published Online: August 25, 2003
... modulus and viscosity from thermal softening to thermal hardening with rising temperature, which does not involve any phase change, has been observed in certain elastomers. An explanation about this interesting phenomenon is given based on thermodynamic considerations. A theoretical analysis is performed...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. July 2003, 70(4): 470–478.
Published Online: August 25, 2003
..., and a hardening potential. To maintain simplicity, the shape of the switching surface is assumed to be spherical in a modified deviatoric stress space. In order to ascertain the functional form of the hardening potential, micromechanical self-consistent simulations of multiple single crystals, with tetragonal...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. May 2002, 69(3): 309–316.
Published Online: May 3, 2002
... inelastic prestraining and the principle cyclic features such as Bauschinger effect, additional hardening, etc. Contributed by the Applied Mechanics Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS for publication in the ASME JOURNAL OF APPLIED MECHANICS . Manuscript received by the ASME...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. March 2001, 68(2): 218–223.
Published Online: November 1, 2000
... hardening, that the Poisson ratio can be determined uniquely from spherical indentation if the onset of plastic yield is known. To this end, a loading and at least two unloadings in the plastic regime have to be considered. Using finite element simulations, the relation between the material parameters...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. March 2001, 68(2): 224–229.
Published Online: November 1, 2000
... ratio identification neural nets indentation plasticity learning (artificial intelligence) hardening deformation finite element analysis In a previous paper (see Huber and Tsakmakis, 1 ), it has been shown, that the Poisson’s ratio can be identified from spherical indentation, provided...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. January 2001, 68(1): 115–117.
Published Online: June 8, 2000
...C. O. Horgan, Fellow ASME; G. Saccomandi The purpose of this research is to investigate the steady rotation of a solid cylinder for a class of strain-energy densities that are able to describe hardening phenomena in rubber. It is well known that use of the classic neo-Hookean strain energy gives...
Journal Articles
Article Type: Technical Papers
J. Appl. Mech. December 2000, 67(4): 777–784.
Published Online: April 7, 2000
... bridging model; this may result in initial delamination growth for some materials with lower fracture toughness when the delamination buckles rather than post-buckles. However, stable growth is obtained for a hardening bridging model; (2) with an increase of the nonlinear fiber bridging parameter β...