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Volume 29 Issue 5
Dec 2015
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Chinese Journal of High Pressure Physics  > 2015  >  29(5): 321-328.
CHEN Tao, JIANG Zhao-Xiu, XING Ming-Zhi, SHEN Hai-Ting, WANG Yong-Gang. Dynamic Yield and Spall Properties of High-Strength Aluminum Alloys at Normal and Elevated Temperatures[J]. Chinese Journal of High Pressure Physics, 2015, 29(5): 321-328. doi: 10.11858/gywlxb.2015.05.001
Citation: CHEN Tao, JIANG Zhao-Xiu, XING Ming-Zhi, SHEN Hai-Ting, WANG Yong-Gang. Dynamic Yield and Spall Properties of High-Strength Aluminum Alloys at Normal and Elevated Temperatures[J]. Chinese Journal of High Pressure Physics, 2015, 29(5): 321-328. doi: 10.11858/gywlxb.2015.05.001
shu

Dynamic Yield and Spall Properties of High-Strength Aluminum Alloys at Normal and Elevated Temperatures

doi: 10.11858/gywlxb.2015.05.001
  • 1.

    Key Laboratory of Impact and Safe Engineering, Ministry of Education, Ningbo University, Ningbo 315211, China

  • 2.

    High Grade Highway Construction Headquarters of Ningbo, Ningbo 315900, China

  • Received Date: 25 May 2014
    Abstract
  • Plate impact tests at normal and elevated temperatures were conducted to examine the influence of temperature on the dynamic response of 2 aluminum alloys (2024-T4 and 7075-T6) with the temperature range of 300-750 K.The free-surface velocity profiles, including the elastic precursor amplitude, pull-back amplitude and the acceleration of pull-back signals were investigated at different temperatures.Hugoniot elastic limit (HEL) strength and spall strength were calculated using the free surface velocity profiles.Normalized HEL strength and normalized spall strength of 2024-T4 Al and 7075-T6 Al exhibit a similar linear decrease with increasing temperature.A cohesive zone model (CZM) was developed to simulate the spall behavior of aluminum alloys at different pre-heated temperatures.The physical meaning of CZM parameters and how to determine these parameters were discussed.It is found that the predicted free surface velocity profiles under different temperatures are in very good agreement with the experimental data, especially the slope, frequency and decay of the free surface velocity oscillations in the later phases of spalling, which demonstrates that the cohesive law is well applicable to characterize the energy dissipated behavior due to damage evolution.

     

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