Numerical simulation of the impact between the front-end-coated projectile and the substrate coated by ceramic film
The propagation of the stress wave in axial direction during the impact between the front-end-coated projectile and the substrate coated by ceramic films is described by the stress wave theorem.The impact process is numerically simulated by ANSYS/LS-DYNA, where the shell unit is used for precision.The effects of thickness of the front-end coating on the interfacial stress are discussed in detail.Dependence of different ceramic films are also considered.Simulation results show that interfacial normal stress is much greater than tangential stress.The interfacial normal stress is greatest when the thickness of the projectile coating is 0.2 mm.The interracial tangential stress increases slightly as the thickness of coating increases.Similar stress history in the interface occurs when the acoustic impedance of the films are close.Greater acoustic impedance results in smaller stress.
Front-end-coated projectile Ceramic film Impact Stress wave Acoustic impedance
Zhi-Lin Wu Xiao-Mei Wang
School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,PR China
国际会议
上海
英文
2198-2202
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）