Research On The Thermal-dynamic Response Of Multi-thin-layer Structure Materials Irradiated By X-ray

In order to study the thermodynamic response of the new multi-thin-layer structure materials irradiation by pulsed X-ray, the quasi-static, dynamic mechanical and thermal physical properties of TC and GC materials are measured by experiment, then established the equivalent model of the multi-thin-layer structure materials, and studied the blow-off impulse and thermal shock wave of multi-thin-layer structure materials irradiation by pulsed X-ray through numerical simulation.The main achievements and conclusions in this dissertation are presented in the following:1. The quasi-static compressive experiments of TC and GFSC materials are conducted, the mechanical parameters of two materials, such as poisson's ratio, elastic modulus, yield strength are measured, and shear modulus of two materials can be gained as 4.69 and 3.29MPa. The DSC curves and the relation of specific heat versus temperature is obtained through differential scanning calorimetry, the TG and DTA curves are obtained through differential thermal analysis.2. In view of the characteristic and shortage of traditional piezoresistive measurement, a symmetrical electricity-bridge measurement system is established. The system is very simply, it can extend the range of pressure measurement to 0.2GPa, and can eliminate the interfere signals in the experiment signals better, which is very useful in low perssure measurement for low impedance materials. By ways of this method, the Hugoniot parameters of TC and GC are measured in the light-gas gun, the results is:C0TC=0.34km/s ,λTC=2.72 ; C0GC=1.23km/s ,λGC=3.02. and normal Grüneisen coefficients of TC and GC materials and the rule of coefficients as a function of ratio-volume are gained.3. In view of the problem and difficult of simulating the pulsed X-ray thermal shock wave in multi-thin-layer structure materials, analyze the advantage of adopting the equivalent model. Establish the equivalent model of multi-thin-layer structure materials, confirm calculate method of each parameter such as C0,λ,a andγ0 in the equivalent model. The equivalent model and delamination model are adopted to simulate the shock wave propagation in Al-Cu and TC-GC MTLSM under plane collision respectively. The result indicate: equivalent model is suit to research the dynamic response of multi-thin-layer structure materials under impact loaded.4. Through physical analysis, combined with the specific circumstances in numerical calculation,∑pg(t)Δt method to calculate the blow-off impulse generated by X-ray radiation is brought out. Analysis indicated: this calculate method is more accurate and realistic.5. Through calculating the blow-off impulse and simulating the thermal shock wave propagation induced by x-ray irradiating in TC-GC multi-thin-layer structure materials, the change rule of the blow-off impulse and the propagation rule of the thermal shock wave is gained.