Constitutive equations of the repeated elasto-plastic deformation of a rigid body, accounting for material strain anisotropy

1996 ◽  
Vol 32 (8) ◽  
pp. 587-594
Author(s):  
Yu. N. Shevchenko ◽  
R. G. Terekhov ◽  
N. S. Braikovskaya
Keyword(s):  
Plastic Deformation ◽  
Rigid Body ◽  
Constitutive Equations ◽  
Strain Anisotropy

A physical theory of snow gliding

1981 ◽  
Vol 18 (1) ◽  
pp. 86-94 ◽  
Author(s):  
David M. McClung
Keyword(s):  
Rigid Body ◽  
Constitutive Equations ◽  
Slip Velocity ◽  
Physical Theory ◽  
Water Film ◽  
Point Of View ◽  
Slip Condition ◽  
Realistic Case ◽  
Viscous Deformation ◽  
Snow Gliding

Snow glide, slip of the entire snowpack over the ground, is not observed unless water reaches the ground interface. In this paper, snow gliding is approached from the point of view that a perfect slip condition is attained at the glide interface whereby a thin continuous water film is envisioned to exist between the snowpack and the ground. Two mechanisms are described by which the snowpack may move forward: (i) creep (defined as slow, viscous deformation) over roughness asperities under the condition that the snowpack conforms to the interface and (ii) rigid body sliding of the snowpack over the interface when it does not conform to the interface. Constitutive equations relating tangential drag on the snowpack to slip velocity are derived for these idealized cases, and the extension to the more realistic case where the processes compete is discussed.

Transformation/Deformation Behavior and its Constitutive Equation for Ti-Ni-Cu Shape Memory Alloy

2008 ◽  
Vol 59 ◽  
pp. 129-134
Author(s):  
Yuji Takeda ◽  
Takaei Yamamoto ◽  
M. Uegaki ◽  
Hiroki Cho ◽  
Toshio Sakuma ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Constitutive Equation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Constitutive Equations ◽  
Deformation Behavior ◽  
Volume Fraction ◽  
Transformation Process ◽  
Reverse Transformation ◽  
Transformation Behavior

This paper describes the transformation and deformation behavior and its constitutive equation for Ti-41.7Ni-8.5Cu (at%) shape memory alloy. Plastic deformation after pre-deformation is investigated using the volume fraction of slip-deformed martensite. New kinetics and constitutive equations are proposed for the reverse transformation process. The material constants in the proposed equationa are determined from the results of tensile and heating/cooling tests of Ti-41.7Ni-8.5Cu (at%) shape memory alloy. The calculated results describe well the deformation and transformation behavior affected by pre-strain.

scholarly journals The theory on homogeneous micro-fluid mixtures

1979 ◽  
Vol 1 (3-4) ◽  
pp. 38-48
Author(s):  
Nguyen Van Diep ◽  
Truong Minh Chanh
Keyword(s):  
Rigid Body ◽  
Relative Motion ◽  
Constitutive Equations ◽  
Fluid Mixtures ◽  
Rigid Body Motions ◽  
Thermodynamic Restrictions

This paper deals with the construction x of a generalized- diffusive theory of simple micro-fluid mixtures composed of a reactive constituents in the relative motion to one another and treated as a single simple micro-fluid. The basic laws of balance are given by postulating the balance law of energy together with invariant requirement under superposed rigid body motions or the mixture as a whole. The linear or nonlinear constitutive equations and full thermodynamic restrictions are given.

Some Plastic Deformation Modes for Indentation of Half Space by a Rigid Body With Serrated Surface as a Model of Roughness Transfer in Metal Forming

2002 ◽  
Vol 124 (2) ◽  
pp. 146-151 ◽  
Author(s):  
Jingyu Shi ◽  
D. L. S. McElwain ◽  
S. A. Domanti
Keyword(s):  
Plastic Deformation ◽  
Finite Element ◽  
Free Surface ◽  
Rigid Body ◽  
Half Space ◽  
Metal Forming ◽  
Forming Process ◽  
Perfectly Plastic ◽  
Metal Forming Process ◽  
Deformation Modes

This paper is concerned with the plastic deformation modes of the free surface of the half space between the teeth on the serrated surface of a rigid body. The rigid body indents the half space perpendicularly and the material of the half space is assumed to be elastic/rigid perfectly plastic. Plane-strain conditions are assumed. The emphasis in this paper is on the profile left on the surfaces of the material when the indentation proceeds to some depth and then the indenter is removed. Based on the observations from finite element results, slip line fields for the plastic deformation regions at various stages of indentation are proposed and the corresponding hodographs for the velocity field are presented. This has application in roughness transfer of final metal forming process.

Study of the strain anisotropy of metals during nonmonotonic plastic deformation in a linear stress state

1990 ◽  
Vol 22 (12) ◽  
pp. 1780-1783 ◽  
Author(s):  
D. V. Khvan ◽  
O. A. Rozenberg ◽  
Yu. A. Tsekhanov
Keyword(s):  
Plastic Deformation ◽  
Stress State ◽  
Strain Anisotropy
Sign in / Sign up

Export Citation Format

Share Document