The use of digital speckle radiography to study the ballistic deformation of a polymer bonded sugar (an explosive simulant)

Prentice, H. J.; Proud, W. G.; Walley, S. M.; Field, J. E.

doi:10.1016/j.ijimpeng.2010.05.003

Cited by 17 publications

(6 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Optical methods, such as photoelasticity, digital speckle radiography, laser induced fluorescent speckle photography, and digital image correlation have been used in the past to understand the failure and fracture mechanics of PBXs subjected to dynamic loading [1][2][3][4][5][6][7]. Most of these studies are at macroscale and have provided much insight into the continuum scale high strain rate behavior of PBXs [2][3][4][5][6][7][8][9][10]. However, these experiments are inadequate to understand the local deformation mechanisms in highly heterogeneous PBX materials.…”

Section: Introductionmentioning

confidence: 99%

Local Deformation and Failure Mechanisms of Polymer Bonded Energetic Materials Subjected to High Strain Rate Loading

Ravindran

Tessema

Kidane

2016

J. dynamic behavior mater.

View full text Add to dashboard Cite

The dynamic multi-scale deformation mechanism of polymer bonded energetic material is investigated. Samples made of polymer bonded sugar (a known simulate for polymer bonded explosives) with 85 % sugar crystals and 15 % polymer binder are used. The samples are dynamically compressed using a split Hopkinson pressure bar. Using a high magnification, meso-scale 2D digital image correlation experimental setup, the local deformation is measured in situ at sub-grain scale. The macroscale deformation mechanism is also investigated with the help of 3D digital image correlation. From the mesoscale experiment, it is observed that the local strain distribution in the specimen is highly heterogeneous with large strain localization occurring at the polymer rich areas between the crystal boundaries. Deformations of the majority of the crystals are minimal, and usually realign themselves to accommodate large deformation of the binder by rigid rotation and sliding. Due to this, delamination of the polymer binder from crystals and binder cracking are the main local failure modes. It is also observed that the presence of small crushed crystals from material processing are the favorable sites for this opening mode failure.

show abstract

Section: Introductionmentioning

confidence: 99%

Local Deformation and Failure Mechanisms of Polymer Bonded Energetic Materials Subjected to High Strain Rate Loading

Ravindran

Tessema

Kidane

2016

J. dynamic behavior mater.

View full text Add to dashboard Cite

show abstract

“…Since impact experiments on PBXs are hazardous, PBSs (C 12 H 22 O 11 ) are often preferred, especially in university laboratories [2]. We selected two sieves with 625 (for 20 µm) and 48 (for 300 µm) meshes for the screening of sugar.…”

Section: Materials and Sample Preparationmentioning

confidence: 99%

“…PBXs are used in a wide variety of applications, ranging from rocket propellants to main explosive charges of conventional munitions. Today, improving the safety of explosives is a great concern due to the rapid development of high-performance weapons [1][2][3][4]. Recently, the mechanical behaviour of explosive materials has been studied with the aim of improving our understanding of these materials and developing highly effective models for pyrotechnic design and safety.…”

Section: Introductionmentioning

confidence: 99%

“…A PBS (or sugar mock) is a special composite material in which sugar is added into a polymer binder instead of explosive crystals and allows the safe investigation of the effect of various parameters such as particle size and distribution on mechanical properties. These parameters are important since they are known to affect the strength of PBXs [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Study on compression–expansion behaviour of PBXs substitutive materials

Zhang

Chen

et al. 2019

Plastics, Rubber and Composites

View full text Add to dashboard Cite

In this work, polymer-bonded sugars were used as a substitutive material for polymer-bonded explosives (PBXs). Their production process and damage mechanism under compressive process were analysed. We also investigated the initial Poisson's ratio of PBXs as well as their mechanical properties under quasi-static compression and variation of Poisson's ratio during the one-dimensional compressive process. Compressive expansion behaviour due to compressive loading was investigated comprehensively. It was found that due to the damage caused by the loading process, volumetric strain and Poisson's ratio showed three stages characteristic. Experimental results proved that compression-expansion had occurred during the one-dimensional compressive process. Simulation results verified that PBXs crystal underwent mainly transgranular fracture under quasi-static compression.

show abstract

“…Prentice et al . relied on the digital speckle radiography technique to reveal regions of intense shear in PBX simulants under low‐pressure and long‐pulse loadings.…”

Section: Introductionmentioning

confidence: 99%

Measuring Crack Growth and Rise in Temperature around a Cylindrical Defect in Explosive Simulants under Low‐Pressure and Long‐Pulse Loadings

Zhang

Shang

et al. 2020

Propellants Explo Pyrotec

View full text Add to dashboard Cite

Low-pressure and long-pulse loadings are critical loading modes in research on non-shock ignition. Under such loadings, viscoplastic deformation, fracture, and a local rise in temperature may occur around inherent defects in condensed explosives to cause non-shock ignition. In this study, transparent poly(methyl methacrylate) was chosen as an explosive simulant to elucidate the processes of crack growth, pore collapse, and rise in temperature at a cylindrical defect by using a set of modified split Hopkinson pressure bars. A recently developed optical temperaturesensing technique that uses the multiphonon-assisted anti-Stokes-to-Stokes fluorescence intensity ratio was used to monitor the rise in temperature in the cracks. By combining the work here with our previous research, two significant conclusions are arrived at: 1) Around the cylindrical defect, the opening-mode crack initiated earlier than the shearingmode crack did but its rate of propagation was considerably lower. Moreover, the smaller the cylindrical defect was, the lower was the rate of propagation of the cracks. 2) The rise in temperature in shearing-mode cracks was higher than that of the opening-mode cracks. It can be inferred that the local rise in temperature caused by shearing was the major factor leading to the non-shock ignition of condensed explosives

show abstract

The use of digital speckle radiography to study the ballistic deformation of a polymer bonded sugar (an explosive simulant)

Cited by 17 publications

References 49 publications

Local Deformation and Failure Mechanisms of Polymer Bonded Energetic Materials Subjected to High Strain Rate Loading

Local Deformation and Failure Mechanisms of Polymer Bonded Energetic Materials Subjected to High Strain Rate Loading

Study on compression–expansion behaviour of PBXs substitutive materials

Measuring Crack Growth and Rise in Temperature around a Cylindrical Defect in Explosive Simulants under Low‐Pressure and Long‐Pulse Loadings

Contact Info

Product

Resources

About