What is isotropic hardening?

Isotropic hardening rule states that the yield surface expands proportionally in all directions when yield stress is exceeded. Though it may not be clear at first glimpse, after yield stress is exceeded and the yield surface has expanded, we get a ‘bigger’ elastic region and a new yield stress!

What is bilinear kinematic hardening?

Bilinear (Isotropic, Kinematic) Hardening Curve. In the bilinear isotropic hardening process, both stress and strain change even after reaching maximum plastic deformation. But the change in shape cannot be observed clearly in the bilinear hardening process.

What is multilinear isotropic hardening?

The multi-linear hardening is defined by a series of plastic strain/yield stress points. The first plastic strain value must be zero and the first yield stress must be greater than zero. RecurDyn treats the isotropic yield stress (nearly) constant after the multi-linear point.

What is nonlinear kinematic hardening?

On nonlinear kinematic hardening plasticity theory☆ This implies that either the material follows isotropic hardening during its initial deformation phase from the virgin state, or that the material obeys the kinematic hardening rule by maintaining constant elastic range but with continuously increasing hardening.

What do you mean by yield of isotropic plastic material?

In materials science and engineering, the yield point is the point on a stress-strain curve that indicates the limit of elastic behavior and the beginning of plastic behavior. Yielding is a gradual failure mode which is normally not catastrophic, unlike ultimate failure.

What is modulus plasticity?

modulus of plasticity (plastic modulus) The ratio between the plastic moment of a beam and its yield stress. General Links for this Work.

Does Ansys use engineering stress or true stress?

Once you finish the simulation, the stresses and strains reported by Ansys are all true stress/strain.

What is isotropic elasticity?

Isotropic materials therefore have identical elastic modulus, Poisson’s ratio, coefficient of thermal expansion, thermal conductivity, etc. in all directions. A common value for the Poisson’s ratio is 0.3.

What is cyclic hardening?

In strain-controlled loading, cyclic hardening means increment of stress amplitude while cycling [6], [14]. Total strain amplitude is the summation of elastic strain and plastic strain amplitudes, shown in Eq. (4).

What is combined hardening?

Combined hardening parameters are determined from each hysteresis loop with different strain amplitudes. In addition, hysteresis loops from three strain amplitudes are used to explain how the parameters from different strain amplitudes can influence on deformations of cyclic C(T) simulation.