The determination of the LJ potential of detonation products used in VLW EOS is introduced. The phase state of detonation product carbon under CJ condition has been discussed by comparing the calculated data with the experimental results. The main difference between VLW EOS and BKW EOS has been pointed out and the origin of this difference has been analyzed. The performance parameters calculated by VLW EOS of a wide range of energetic materials, including high explosives, fuel-air explosives and civil explosives, is listed, and the calculations are in accord with the experimental data very well.

The nonlinear instability of an one-dimensional detonation wave was numerically simulated in the mixture of C₂H₆ and air with equivalence of 1. The influence of mesh size on the numerical results of pulsating of shock history was analyzed. Mesh size in calculation was fixed in according to the length of induction zone L_in, which was determined from ZND model to be 4.6 mm for the detonation wave in the mixture of C₂H₆ and air. As the decrease of mesh size, the solutions of pressure history do not tend to be identical. Detonation shock history was very irregular as the mesh size was not fine enough. As the mesh size was 0.01L_in and 0.005L_in, pulsating was regular with the mode of period-doubling mode. As the mesh size was 0.0025L_in, pulsating consisted of a series of regular oscillations and three irregular oscillations in the range of calculation, but finally the average wavelength of oscillations tended to 91~93 mm which approaches to the length of cell size of 88 mm from the experiments.

A dynamic cylindrical cavity expansion penetration model for compressible, elastic-plastic, rate-independent materials with power-law strain-hardening was presented. A fortran code using this model was written. We used the code to calculate the stress distribution in the target. We also used the code to predict residal velocities and ballistic limits for rigid, conical-nose projectile perforating strain-hardening target plates, and to predict the penetration depth for the same projectile penetrating into strain-hardening targets with semi-infinite thickness. We compared the model predictions of residal velocities and ballistic limits with the data from experiments with 0.026 kg tungsten projectiles impacting normally 5083-H131 aluminum armor plates. We also compared the predicted penetration depths with the experimental data or the 2-D numerically simulated results by LTZ-2D code for the 0.024 kg and the 2.96 kg maraging steel projectiles impacting normally semi-infinite 6061-T651 aluminum armor targets. Good agreements were obtained in both comparisons.

Based on the general LS method, an improved LS method for capturing compressible fluid with multi-interface interactions is given. This method can decrease the void region near the multi-interactions point, but not change the others. Both the LS equations capturing the material interface quality and the Eulerian conservative equations are solved by using a high resolution unspliting finite volume scheme, and fifth order WENO scheme for re-initialization level set equations. Some examination and application examples in capturing conjunct multi-fluid interfaces cases are simulated.

To obtain more precise prediction of dynamic deformation, theoretical analysis and experimental investigations were carried out on the plasticity dynamic response of clamped square plates subject to underwater explosion loading in a water tank. Based on the principle of the energy equilibrium, the more reasonable deductive expressions were obtained for the final deflections of the shock wave upon the built-in plates subjected to the impulse loading, and the maximum large plasticity deformation solution were also obtained by the analytical plasticity method of equal-moment calculation. The different plastic deformations of the plates were measured for different charge weights and propagating distances. Both of the deformation displacements of test and theoretical calculation are quite agreement to within an about 10% discrepancy.

Three indica rice cultivars seeds, Yuexiangzhan were treated by different high hydrostatic pressure or were kept for different time. As comparison to control, both germination rate and seedling rate decreased considerably with pressure or treated time increasing. Plant growth was inhibited in treated materials during the early growth stage of seedling, but the plant height of treated cultivars could exceed that of control after sowing 30 d. The expression of some isoenzymes, esterase (EST), peroxidase (POX), superoxide dismutase (SOD) and malic enzyme (ME), was studied by polyacrylamide gel electrophoresis (PAGE), the results indicated that the expression of EST was restrained, whereas the other isoenzymes was affected lettle on expression of POX, SOD and ME. Three types of rice (Oryza sativa L.) cultivars seeds, indica cultivars (Nanjing 11 and Yuexiangzhan), japonica cultivars (Qiuguang and Taizhong 65) and intermediate type between indica cultivars and japonoca cultivars (Bulu Gendjah and Bulu Rusa), were treated by 75 MPa pressure for 10 h. The germination rate and seedling rate of three types rice all decreased. But the decrease was most significant in two indica cultivars (Nanjing 11 and Yuexiangzhan), whereas was least in two japonica cultivars (Qiuguang and Taizhong 65). The results implied that different types of rice cultivars exhibited different responses to high hydrostatic pressure. Japinica cultivars were higher resistance to high pressure than other types of cultivars. The above results showed that high hydrostatic pressure could affect the seeds germination, seedling growth and expression of EST.

Methods and experiments of applying VISAR to measure particle velocity history at the interface between shocked Cu specimen and LiF window and LiF specimen and LiF window are described, respectively. The peak stress levels were 6.5 GPa and 3.61 GPa. Wedged LiF window was applied to smooth out the effect of the reflected light and parasitical interference from the window rear surface, and as a result the signal-to-noise ratio and the reliability of window VISAR were improved significantly.

An evaluation method was proposed for the design and the life-span of use of blast chamber for break out affair, and the JBG series blast chambers had been designed and built up for resisting 1.0~6.0 kg TNT blast. In order to test the ability of the resistance to blasting, explosion experiment had been done, and the remainded distortions of the shell were measured. According to the method the remainded distortions of the JBG series blast chamber loaded first time by explosion with the allowed maximum explosive mass was calculated and the life-span of use for the shell affected by repeat explosion load was evaluated. The experimental and calculated results of remainded distortion were on the whole the same.

The resistance-pressure and capacitance-pressure relationships for double perovskite compound Sr₂FeMo_xNb_1-xO₆ (x=0, 0.3) have been studied in the pressure range of 0~20 GPa using a diamond anvil cell at room temperature. The experimental results indicate that Sr₂FeNbO₆ undergoes a structural transition at about 7.5 GPa while Sr₂FeMo_0.3Nb_0.7O₆ at about 2.8 GPa. According to the analysis of energy dispersive X-ray diffraction with synchrotron radiation, these are considered as electronic structure transitions caused by high pressure.

The behaviors of dynamic damage and fracture of D6A, 921, 45 steels were studied via symmetric impact experiments. Using the double wave structure of the free-surface velocity profile and the material longitudinal elastic wave speed at room temperature, we obtained the D-u_p Hugoniot relations for the three steels. The Hugoniot elastic limits and spall strengths of the three steels were also obtained. A new simple phenomenal equation for describing the evolution of damage was proposed, with which the experimental spall processes were simulated.