2014 Vol. 34, No. 3
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2014, 34(3): 257-263.
doi: 10.11883/1001-1455(2014)03-0257-07
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Abstract:
A calculation procedure of equivalent electrical circuit was programmed.Combining circuit calculation program with LS－DYNA980 MHD, a method for magnetically driven flyer simulation coupled with electrical circuit was proposed to simulate a real exper...
A calculation procedure of equivalent electrical circuit was programmed.Combining circuit calculation program with LS－DYNA980 MHD, a method for magnetically driven flyer simulation coupled with electrical circuit was proposed to simulate a real exper...
2014, 34(3): 264-271.
doi: 10.11883/1001-1455(2014)03-0264-08
Abstract:
The CSTBD (cracked straight-through Brazilian disc) specimens of sandstone were diametrically impacted by the split Hopkinson pressure bar of large diameter in the mode-Ⅰ (opening mode) rock dynamic fracture test.The experimental-numerical method was...
The CSTBD (cracked straight-through Brazilian disc) specimens of sandstone were diametrically impacted by the split Hopkinson pressure bar of large diameter in the mode-Ⅰ (opening mode) rock dynamic fracture test.The experimental-numerical method was...
2014, 34(3): 272-277.
doi: 10.11883/1001-1455(2014)03-0272-06
Abstract:
Based on load technique of gas gun and inertia projecting method, a device is developed to eject water column with desired speed and regular shape for hydraulic impact tests.Referring to piston push technology, this device used a projecting cylinder ...
Based on load technique of gas gun and inertia projecting method, a device is developed to eject water column with desired speed and regular shape for hydraulic impact tests.Referring to piston push technology, this device used a projecting cylinder ...
2014, 34(3): 278-284.
doi: 10.11883/1001-1455(2014)03-0278-07
Abstract:
A two-dimensional finite element model was created from a tomographic image of the aluminum foams, which represents the cell shape and geometric distribution of real foams.To determine the mechanical properties of cell wall material, the uniaxial str...
A two-dimensional finite element model was created from a tomographic image of the aluminum foams, which represents the cell shape and geometric distribution of real foams.To determine the mechanical properties of cell wall material, the uniaxial str...
2014, 34(3): 285-291.
doi: 10.11883/1001-1455(2014)03-0285-07
Abstract:
The strain-rate effects of ring structure are discussed by the numerical simulation method.The calculated results show that the buckling instability exists in both the ring structure and the folded plate structure.For the ring structure, there is a s...
The strain-rate effects of ring structure are discussed by the numerical simulation method.The calculated results show that the buckling instability exists in both the ring structure and the folded plate structure.For the ring structure, there is a s...
2014, 34(3): 292-299.
doi: 10.11883/1001-1455(2014)03-0292-08
Abstract:
To solve the no convergence problem due to grid distortion when simulating hypervelocity impact problems using continuum-based discrete element method (CDEM), a 2D particle contact-based meshfree method (PCMM) is presented.In PCMM, triangle elements ...
To solve the no convergence problem due to grid distortion when simulating hypervelocity impact problems using continuum-based discrete element method (CDEM), a 2D particle contact-based meshfree method (PCMM) is presented.In PCMM, triangle elements ...
2014, 34(3): 300-306.
doi: 10.11883/1001-1455(2014)03-0300-07
Abstract:
In order to study the confinement effect of inert materials on insensitive high explosives, the improved shock polar curve and phenomenological reaction model were employed.The confinement types were categorized by the improved shock polar theory, wh...
In order to study the confinement effect of inert materials on insensitive high explosives, the improved shock polar curve and phenomenological reaction model were employed.The confinement types were categorized by the improved shock polar theory, wh...
2014, 34(3): 307-314.
doi: 10.11883/1001-1455(2014)03-0307-08
Abstract:
Combined with the crack tip stress intensity factor criterion of linear elastic fracture mechanics, the model of initiation and extension of gas-driven fractures by compound perforation is established.A function with multiple variables describing gas...
Combined with the crack tip stress intensity factor criterion of linear elastic fracture mechanics, the model of initiation and extension of gas-driven fractures by compound perforation is established.A function with multiple variables describing gas...
2014, 34(3): 315-321.
doi: 10.11883/1001-1455(2014)03-0315-07
Abstract:
A multi-stage computational inverse technique is presented to determine the dynamic constitutive parameters of concrete based on the split Hopkinson pressure bar tests at different strain rate loadings.In this method, sensitivity analysis for paramet...
A multi-stage computational inverse technique is presented to determine the dynamic constitutive parameters of concrete based on the split Hopkinson pressure bar tests at different strain rate loadings.In this method, sensitivity analysis for paramet...
2014, 34(3): 322-327.
doi: 10.11883/1001-1455(2014)03-0322-06
Abstract:
Cylinder shells of 45 steel were freezing recovery experimented using a modified SHPB device to observe the whole fracture process, including crack initiation, crack propagation conditions and final fracture modes.By microanalysing the internal struc...
Cylinder shells of 45 steel were freezing recovery experimented using a modified SHPB device to observe the whole fracture process, including crack initiation, crack propagation conditions and final fracture modes.By microanalysing the internal struc...
2014, 34(3): 328-333.
doi: 10.11883/1001-1455(2014)03-0328-06
Abstract:
The relationship between elastic bar diameter of split Hopkinson pressure bar(SHPB) systems and the minimum strain rate causing rock failure under once impact with half-sine stress wave loads, is analyzed based on the Steverding-Lehnigk fracture crit...
The relationship between elastic bar diameter of split Hopkinson pressure bar(SHPB) systems and the minimum strain rate causing rock failure under once impact with half-sine stress wave loads, is analyzed based on the Steverding-Lehnigk fracture crit...
2014, 34(3): 334-339.
doi: 10.11883/1001-1455(2014)03-0334-06
Abstract:
A non-explosive underwater shock loading device exhibits many advantages as a new labscale research method of underwater explosion, including high reliability, low cost.This method has an important role on further research on underwater explosion.To ...
A non-explosive underwater shock loading device exhibits many advantages as a new labscale research method of underwater explosion, including high reliability, low cost.This method has an important role on further research on underwater explosion.To ...
2014, 34(3): 340-346.
doi: 10.11883/1001-1455(2014)03-0340-07
Abstract:
NaOH and sodium silicate-activated slag and fly ash based geopolymer concrete(NSSFGC) and NaOH and Na2CO3-activated slag and fly ash based geopolymer concrete(NNSFGC) with strength grades of C30 were prepared, the strain rate effects under impact loa...
NaOH and sodium silicate-activated slag and fly ash based geopolymer concrete(NSSFGC) and NaOH and Na2CO3-activated slag and fly ash based geopolymer concrete(NNSFGC) with strength grades of C30 were prepared, the strain rate effects under impact loa...
2014, 34(3): 347-353.
doi: 10.11883/1001-1455(2014)03-0347-07
Abstract:
Aimed at acceleration information acquisition and original signal failure problem of projectile penetrating into concrete, a projectile-borne storage testing system was used to conduct test, and the numerical simulation of high-velocity impact was ca...
Aimed at acceleration information acquisition and original signal failure problem of projectile penetrating into concrete, a projectile-borne storage testing system was used to conduct test, and the numerical simulation of high-velocity impact was ca...
2014, 34(3): 354-360.
doi: 10.11883/1001-1455(2014)03-0354-07
Abstract:
Wall pressure as a load parameter should be confirmed exactly, and then offered for investigating dynamic response of structure such as a plate subjected to underwater explosion.On the basis of plane shock wave hypothesis, a theoretical formula was d...
Wall pressure as a load parameter should be confirmed exactly, and then offered for investigating dynamic response of structure such as a plate subjected to underwater explosion.On the basis of plane shock wave hypothesis, a theoretical formula was d...
2014, 34(3): 361-366.
doi: 10.11883/1001-1455(2014)03-0361-06
Abstract:
This numerical simulation study was undertaken to investigate the penetration and explosion efficiency of a sequence of precision-guided earth penetrating weapon(EPW)into hard rock target.The main objective of the study was to ascertain the damage de...
This numerical simulation study was undertaken to investigate the penetration and explosion efficiency of a sequence of precision-guided earth penetrating weapon(EPW)into hard rock target.The main objective of the study was to ascertain the damage de...
2014, 34(3): 367-372.
doi: 10.11883/1001-1455(2014)03-0367-06
Abstract:
The conception of scaled distance was applied to tunnel blasting vibration zoning and the zoning was judged by the slope of velocity attenuation curve.Based on the results, the BP wavelet neural network method for tunnel blasting vibration velocity n...
The conception of scaled distance was applied to tunnel blasting vibration zoning and the zoning was judged by the slope of velocity attenuation curve.Based on the results, the BP wavelet neural network method for tunnel blasting vibration velocity n...
2014, 34(3): 373-378.
doi: 10.11883/1001-1455(2014)03-0373-06
Abstract:
A new kind of composite energy absorption material was made by filling the holes of open-cell aluminum foam with polyurethane.Split Hopkinson pressure bar impact experiments were performed to evaluate the dynamic mechanical property of the polyuretha...
A new kind of composite energy absorption material was made by filling the holes of open-cell aluminum foam with polyurethane.Split Hopkinson pressure bar impact experiments were performed to evaluate the dynamic mechanical property of the polyuretha...
2014, 34(3): 379-384.
doi: 10.11883/1001-1455(2014)03-0379-06
Abstract:
A new non-ideal explosive was obtained by adding aluminum fiber to RDX.Pressure-time curves were measured in different regions by underwater explosion experiments of aluminum fiber explosive and RDX.Peak pressure, impulse, shock wave energy, bubble i...
A new non-ideal explosive was obtained by adding aluminum fiber to RDX.Pressure-time curves were measured in different regions by underwater explosion experiments of aluminum fiber explosive and RDX.Peak pressure, impulse, shock wave energy, bubble i...
