The Destroy Study Of Plate Structure Under Explosive Loading

A typical failure mode of thin clamped circular plates subjected to localize explosive loading involves three stages with increasing intensity of applied loading. In the first dishing phase, the plate undergoes large inelastic deformation without fracture. This is followed by discing in which an initial circumferential crack detaches the circular cap from the plate. In the last petalling phase, observed under high intensity of impulsive loading, radial cracks propagate outward from the initial hole while the subsequent rotation of the plate segments leads to a number of petals.In the present paper, an analytical investigation on the deformation and failure of the plates is presented covering all the above stages of deformation with various contact explosive loading. The main works are as follows.1.the transient response of the plates under a localized pulse loading was investigated analytically. With the closed form deflection solution for thin plates subjected to localize explosive loading, the critical impulse to fracture is obtain. Furthermore, the critical energy is obtain when the plate discing.2. Fai lure by petalling occurs when thin plates subjected to contact explosive loading of cylindrical dynamite, deformation process of thing plate subjected to contact explosive loading of cylindrical dynamite is divided by two phase, namely petalling pre-occurring and post-occurring. The number of petals and the bent radius is attained by using variational principle. Finally, the relationship between the radius of crevasse and the weight of dynamite is attained based on an energy balance. The solution compares well with experimental results.