抄録
The accidental explosion of natural gas is almost deflagration from beginning to end. Material failure mechanism with deflagration was studied with the steel vessel of a fragile material on the end. The breakage pressure depends on pressure increasing rate. Rapid pressure increasing causes higher pressure breaking. The tensile tests of different tensile speed showed that the constant strain breakage ruled the material breakage. The rheology model of material breakage with the increasing stress could explain the constant strain breakage mechanism. Voigt model (or Kelvin model) consisted of a spring and a dashpot was suitable for the rheology model. The tensile tests determined the coefficients of the spring and the dashpot of the model. These 2 parameters and the breakage strain (= constant) predict the breakage pressure and time. A case study of tracing paper as the fragile material showed good result of this approach. Further studies of actual constructional material as steel bar, float glass, duralumin plate are needful for next engineering step.
