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《Journal of Ballistics》 2004-03
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NUMERICAL SIMULATION ON STRESS WAVE PROPAGATING IN MULTI-LAYERED MEDIA

Dong Yongxiang① Xia Changjing②①LNM, Institute of Mechanics, CAS, Beijing, 100080②Institute of Rock Mechanics and Fractals, CUMT, Beijing, 100083  
The calculational results have been shown f easible by comparing with the experimental results from references. The stress p eak value decreases significantly when the interlayer of granite is replaced by foamed aluminum in the three-layered granite media. Meanwhile, the strain energ y becomes 1.6 times as much as that of the original. It shows that the soft laye r has an important effect on energy dissipation. In the condition of the ratio o f impulse width of input stress wave to the thickness of three layered media bei ng 1/2, and the foamed aluminum thickness occupies 0.2 of the total samples thic kness, that is to say, the impulse width of input stress wave is 2.5 of the foam ed aluminum thickness, the strain energy of the three-layered media accounts fo r approximately 60 percent of total energy. It is more ideal situation on stress attenuation.
【CateGory Index】: O347.4
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