Separation characteristics study of ridge-cut explosive bolts

Abstract Explosive bolts are one type of reliable and efficient pyrotechnic release devices used for many applications. Although numerous explosive bolts have been designed and utilized, most design processes rely on experience based on repetitive experiments. In order to provide a better understanding of the separation behavior of explosive bolts, separation behavior analysis environments for the ridge-cut explosive bolts are established. Ridge-cut explosive bolts, which are separated by ridge-cut mechanism or spallation, are analyzed using AUTODYN. From the behavior analysis of explosive bolts whose design was based on the author's prior experience, the numerical analysis method is verified, including appropriate failure criteria. Utilizing the proposed methodology, the separation characteristics of ridge-cut explosive bolts according to confinement conditions, and especially the gap distance between the bolt body and the fixture, are studied. A degradation in separation reliability due to tight gap distance is observed in separation experiments. This separation phenomenon is specifically clarified by the separation behavior analysis. Based on the numerical study of separation characteristics, some design improvements considering manufacturing tolerance are proposed here.

[1]  John S. Rinehart,et al.  Some Quantitative Data Bearing on the Scabbing of Metals under Explosive Attack , 1951 .

[2]  John S. Rinehart,et al.  Scabbing of Metals under Explosive Attack: Multiple Scabbing , 1952 .

[3]  M. Meyers.  Dynamic Behavior of Materials , 1994 .

[4]  Bibiana Luccioni,et al.  Craters Produced by Explosions on the Soil Surface , 2006 .

[5]  E. Lee,et al.  Adiabatic Expansion of High Explosive Detonation Products. , 1968 .

[6]  B. Mohanty,et al.  Numerical simulation of stress wave induced fractures in rock , 2012 .

[7]  K. O. Brauer,et al.  Handbook of Pyrotechnics , 1974 .

[8]  Gerald Nurick,et al.  The analysis and simulation of welded stiffener plates subjected to localised blast loading , 2010 .

[9]  J Bement Laurence,et al.  A MANUAL FOR PYROTECHNIC DESIGN, DEVELOPMENT AND QUALIFICATION , 2013 .

[10]  G. N. Nurick,et al.  Numerical simulation of the post-failure motion of steel plates subjected to blast loading , 2005 .

[11]  Masuhiro Beppu,et al.  Numerical analysis method for the RC and geological structures subjected to extreme loading by energetic materials , 2007 .

[12]  Jonas A. Zukas,et al.  Introduction to Hydrocodes , 2004 .

[13]  Jae-Hung Han,et al.  Frequency tunable vibration and shock isolator using shape memory alloy wire actuator , 2014 .

[14]  N. Nsiampa,et al.  Experimental and Numerical Investigations on the Origins of the Bodywork Effect (K-Effect) , 2010 .

[15]  R. Courant,et al.  On the Partial Difference Equations, of Mathematical Physics , 2015 .

[16]  B. Hopkinson.  A method of measuring the pressure produced in the detonation of high explosives or by the impact of bullets , 1914 .

[17]  Masahide Katayama,et al.  Numerical study of the conical shaped charge for space debris impact , 2001 .

[18]  G. Nurick,et al.  The Crushing Characteristics of Square Tubes With Blast-Induced Imperfections—Part II: Numerical Simulations , 2009 .

[19]  D. Agard,et al.  Microtubule nucleation by γ-tubulin complexes , 2011, Nature Reviews Molecular Cell Biology.

[20]  Susumu Toda,et al.  Analysis of jet formation and penetration by conical shaped charge with the inhibitor , 1999 .

[21]  Gerald Nurick,et al.  The influence of boundary conditions on the loading of rectangular plates subjected to localised blast loading – Importance in numerical simulations , 2009 .

[22]  G. Nurick,et al.  The deformation and tearing of thin circular plates subjected to impulsive loads , 1990 .

[23]  G. Nurick,et al.  The Crushing Characteristics of Square Tubes With Blast-Induced Imperfections—Part I: Experiments , 2009 .