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http://dx.doi.org/10.20910/JASE.2018.12.4.106

Investigation of Tensile Strain Rate Effects on Composite Material for Aircraft Structural Survivability Assessment  

Seo, Bo-hwi (Agency for Defense Development)
Publication Information
Journal of Aerospace System Engineering / v.12, no.4, 2018 , pp. 106-111 More about this Journal
Abstract
Hydrodynamic ram phenomenon could be generated by external threats such as impact and blast in the aircraft. High strain rate deformation caused by the hydrodynamic ram phenomenon is one of the main factors to influence structural survivability. Mechanical properties of composite structure change rapidly under conditions of high strain rate. Therefore, it is necessary to experimentally investigate the influence of strain rates for aircraft structural survivability. In this paper, tensile tests of composite material were conducted for low and high strain rates to investigate the influence of the various strain rates. Tensile modulus increases more compared to tensile strength at high strain rate under hydrodynamic ram condition. Regression analysis was conducted to predict tensile modulus at various strain rates because it is one of the main damaging factors for composite structures under high strain rate conditions. Also, the mechanical properties of composite materials were acquired and analyzed under high strain rate conditions. It is hypothesized that the results from this study would be used for designing aircraft composite structures and evaluation considering structural survivability.
Keywords
High Strain Rate; Composite; Aircraft Structural Survivability; Hydrodynamic Ram;
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Times Cited By KSCI : 3  (Citation Analysis)
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