According as energy conservation principle,the formula of weft tension peak value during air-jet weaving was deduced.

Influence of length/diameter ratio of explosive charge on in-tunnel blast peak pressure;

The results indicate that: the cavity radius becomes stable at approximately 6000μs;the blasting pressure waves mainly are transmitted horizontally;the peak pressure has a negative logarithm relationship with distance perpendicular to the charging bisector;and the valid influence area r.

The experimental results show that the peak pressure and positive pressure actuation duration by the first drilled explosion on the same measuring points are less th.

In order to research on correlative functions of peak stress and deformation stored energy with Zener-Hollomon parameter,the elevated temperature tensile test of 45 steel was carried out at Gleeble-1500D thermal-mechanical simulator,in the range of deformation temperature 1123-1273K and initial strain rate 0.

The model of thermal deformation and the relationship of peak stress,peak strain and Z were obtained that provide basic data for prediction and control of microstructure and properties of tested steel products.

The activation energy of deformation was calculated and the relationship among peak stress and deformation temperature and strain rate was established.