1) spin of deformation rate frame
In the paper,spin of deformation rate frame Ωd is discussed in the process of torsion test and it is derived large strain constitutive relationship of elastoviscoplastic based on τ—γ curve of torsion test while objective stress rate is based on spin of deformation rate frame Ωd.
2) deformation rate
Study is made of the effect of rolling temperature and single-pass deformation rate on Kovar/Cu/Kovar laminates .
Taking U71Mn steel as an example, the effect of heating time, protective material and rolling deformation rate on decarburization and oxidation of the slab has been studied by observing the changes of the slab's decarburized layer during the course of heating and rolling.
3) deformation rate
Differential scanning calorimetry (DSC) was employed to investigate the relation of deformation rate and eutectic melting activity energy of AZ91D magnesium alloy by SIMA method.
Taking U71Mn steel as an example, the effect of heating time, protective coating and rolling deformation rate on decarburization and oxidation of the heavy rail slab has been studied by observing the changes in the slab's decarburized layer in the course of heating and rolling.
4) strain rate
The strain-stress curves were measured using Gleeble 3800 thermal mechanical simulator at strain rates of 0.
The relationship between volume fraction of ultra-fine grained ferrite and strain rate was investigated for a plain low carbon steel (type Q235).
The influences of different technology parameters,such as temperature,strain,strain rate,on deformation resistance and microstructure of Q235 steel were investigated by Gleeble-1500 machine,which provided references for production practice.
5) deformation rate
The influence of different deformation temperature and different deformation rate on SUS316L stainless steel flow and mircostructure
The deformation temperature and the deformation rate are the mai.
And the variation of deformation rate of plasticized material was also simulated.
6) deformation curvature
Based on analyzing the mechanism of laser peen forming(LPF),a theory of pure bending with small deflection of metal sheet induced by laser peening was presented,the estimated formula of sheet deformation curvature after LPF was derived,and the mathematical model among radius curvature of deformation,depth of residual stress and the material property was established.
Due to the distinct difference in tensile and compressive properties,the position and deformation curvature of curved neutral layer will change with time for the!strata in a creep state.
In this paper,theories of flexibility difference and deformation curvature which identify structural damage are introduced.