Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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A Constitutive Model for Polymer-Bonded Explosive Simulants Considering Stress Softening and Residual Strain

응력연화와 잔류변형을 고려한 복합화약 시뮬런트의 구성방정식연구

  • Yeom, KeeSun (The 4th Research and Development Institute, Agency for Defense Development) ;
  • Huh, Hoon (School of Mechanical, Aerospace and Systems Engineering, Korea Advanced Institute of Science and Technology) ;
  • Park, Jungsu (The 4th Research and Development Institute, Agency for Defense Development)
  • 염기선 (국방과학연구소 제4기술연구본부) ;
  • 허훈 (한국과학기술원 기계항공시스템학부) ;
  • 박정수 (국방과학연구소 제4기술연구본부)
  • Received : 2014.03.20
  • Accepted : 2014.10.17
  • Published : 2014.12.05
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Abstract

PBX simulant is known to exhibit highly nonlinear behaviors of deformation such as the stress softening, hysteresis under cyclic loading, residual strain after unloading, and aging. This paper proposes a new pseudo-elastic model for PBX simulant considering stress softening and residual strain. Uniaxial loading and unloading tests at quasi-static states were carried out in order to obtain the mechanical properties of the PBX simulants. And then the Dorfmann-Ogden model is modified to make it consistent with the test result of PBX simulants. Prediction with the new model shows a good correspondence to the experimental data demonstrating that the model properly describes stress softening and residual strain of PBX simulants.

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References

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