【摘 要】
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A numerical model of bird impact on a square aluminum alloy LY12-CZ plate was established using the explicit finite element code PAM-CRASH.In the numerical
【出 处】
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2012 Postdoctoral Symposium of China on Materials Science &a
论文部分内容阅读
A numerical model of bird impact on a square aluminum alloy LY12-CZ plate was established using the explicit finite element code PAM-CRASH.In the numerical model, constitutive model of aluminum alloy LY12-CZ was described by Johnson-Cook equation.Stress-strain curves at 4 different strain rates of aluminum alloy LY12-CZ were measured by split Hopkinson tensile bar (SHTB) tensile tests and 5 constants in Johnson-Cook equation were fitted.Bird was modeling by Smooth Particle Hydrodynamics (SPH) method.Murnaghan EOS equation for the bird material simulation was introduced.Two corresponding bird impact experiments were conducted.The calculation results were compared with the bird impact experimental results.The good agreement between them has confirmed the numerical analysis model including bird and aluminum alloy constitutive model is reasonable and reliable.The analysis process and numerical calculation method used in this paper provides reference for anti-bird impact study of aircraft structure.
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