An increment numerical method is used to analyze the elastic_plastic dynamic buckling of ring_stiffened cylindrical shells under axial fluid_solid impact loading on the basis of discrete stiffeners model,and taking account of large deflections and strain_rate sensitive yielding material properties.

This paper will further discuss the proposition,and apply the potential energy principle of coupled systems to physically simulated calculations of plastic deformations for strain hardening materials.

The results demonstrate that skin stiffness decreases with increasing thermal damage degree and there exist strain rate sensitivity at different damage levels,caused mainly by hydration changes.

The strain hardening exponent n and strain rate sensitivity index m were obtained.

The results show that there is a reverse Hall-Petch relationship between the yield stress and the grain size of ECAE AZ31 Mg alloy,and the tension-compression asymmetry is weakened;ECAE alloy also exhibits a strain rate sensitivity,and the strain rate sensitivity factor will be increased with increasing the process temperature.

Investigation on the strain rate sensitivity of the aluminium foam containing silicate rubber;

Under different strain rate,research is taken on the dynamic compressing stress of sandwich beams with aluminum foam core including strain responding attribute,energy absorbing characteristic and strain rate sensitivity.

The thermal viscoplastic constitutive equation was established by the impact compression and the impact shearing tests by the split Hopkinson pressure bar(SHPB),the process of local plastic instability at higher strain rates was analyzed,the criterion of plastic instability was obtained,and the nature of the high strain rate sensitivity for local plastic instability was revealed.

Dislocation theory and molecular dynamics simulation were used to investigate the effect of atom properties on the strain-rate sensitivity of FCC metals.