INVESTIGATION OF THE IMPACT BEHAVIOR OF WINDOWPANE GLASS PLATES BY LOW VELOCITY 9MM SPHERICAL PROJECTILE.

Ahuja P, Panchal A, Dahiya M S

Abstract


In cases involving Firearms,it is very multifaceted work to investigate and authenticate cause behind the crime. In real life cases which involve glass as a target or mid target, it is very difficult to determine the distance of shooting. For near distance firing, GSR evaluation is effective, but the need of the day is to stronger the investigationfor all firingranges. For material like Glass panels or Glass windows, glass fractures when found in ballistic cases can help in evaluation of distance of firing and even velocity of fire. In this study, glass plates of equivalent dimensionswere coated with thin filmlamination and subjected to impact by projectiles at varying distance. The assessmentfiring was carried out at Ballistic Testing Range existing in our campus,during the assessment 9mm Projectile were impacted on the glass plates with velocity around 400 ± 20 m/s.Experiments were carried out to obtain basic data for estimating the impact distances of projectiles from the morphology of the fracture. Projectilesof 9mm caliber were shot onto laminated windowpane glass plates firmly held around a frame. It was assumed that impact distance would create differences in surface tension on the glass plates, which in turn affects the fractography of glass under observation. A strong experimental correlation was found between fractures and the impact distances. A unique relationship was obtained between crack area and impact distancefrom the numerical analysis of the fractureof the glass plates.


Keywords


Fractures, Velocity, Glass, Tendency, Range.

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References


Knight, C.G., Swain, M.V. and Chaudhri, M.M., 1977. Impact of small steel spheres on glass surfaces. Journal of Materials Science, 12(8), pp.1573-1586.

Ball, A. and McKenzie, H.W., 1994. On the low velocity impact behavior of glass plates. Les Editions de Physique Les Ulis, J. Phys.(France) IV(France), 4, pp.783-788.

Walley, S.M. and Field, J.E., 2005. The contribution of the Cavendish Laboratory to the understanding of solid particle erosion mechanisms. Wear, 258(1), pp.552-566.

Knight, C.G., Swain, M.V. and Chaudhri, M.M., 1977. Impact of small steel spheres on glass surfaces. Journal of Materials Science, 12(8), pp.1573-1586.

Ball, A. and McKenzie, H.W., 1994. On the low velocity impact behaviour of glass plates. Le Journal de Physique IV, 4(C8), pp.C8-783.

Walley, S.M. and Field, J.E., 2005. The contribution of the Cavendish Laboratory to the understanding of solid particle erosion mechanisms. Wear, 258(1), pp.552-566.

Field, J.E., 1971. Brittle fracture: its study and application. Contemporary Physics, 12(1), pp.1-31.

Field, J.E., 1988. Investigation of the impact performance of various glass and ceramic systems. CAMBRIDGE UNIV (UNITED KINGDOM) CAVENDISH LAB.Report No. R&D 5087-MS-01. p. 14e5.

Field, J.E., Sun, Q. and Townsend, D., 1989. Ballistic impact of ceramics.

Chaudhri, M.M. and Walley, S.M., 1978. Damage to glass surfaces by the impact of small glass and steel spheres. Philosophical Magazine A, 37(2), pp.153-165.

Bless, S. and Chen, T., 2010. Impact damage in layered glass. International Journal of Fracture, 162(1-2), pp.151-158.

Timmel, M., Kolling, S., Osterrieder, P. and Du Bois, P.A., 2007. A finite element model for impact simulation with laminated glass. International Journal of Impact Engineering, 34(8), pp.1465-1478.

Ismail, J., Zaïri, F., Naït-Abdelaziz, M. and Azari, Z., 2012. How cracks affect the contact characteristics during impact of solid particles on glass surfaces: A computational study using anisotropic continuum damage mechanics. International Journal of Impact Engineering, 40, pp.10-15.

Pyttel, T., Liebertz, H. and Cai, J., 2011. Failure criterion for laminated glass under impact loading and its application in finite element simulation. International Journal of Impact Engineering, 38(4), pp.252-263.

Holmström, E., Samela, J. and Nordlund, K., 2011. Atomistic simulations of fracture in silica glass through hypervelocity impact. EPL (Europhysics Letters), 96(1), p.16005.

Ravi-Chandar, K., 2004. Dynamic fracture. Elsevier.

Silling, S.A., 2005. Fragmentation modeling with EMU. Sandia National Laboratories, Albuquerque, NM, Technical report.

Bobaru, F. and Ha, Y.D., 2011. Adaptive refinement and multiscale modeling in 2D peridynamics.

Silling, S.A., 2000. Reformulation of elasticity theory for discontinuities and long-range forces. Journal of the Mechanics and Physics of Solids, 48(1), pp.175-209.

Ha, Y.D. and Bobaru, F., 2010. Studies of dynamic crack propagation and crack branching with peridynamics. International Journal of Fracture, 162(1-2), pp.229-244.

Ha, Y.D. and Bobaru, F., 2011. Characteristics of dynamic brittle fracture captured with peridynamics. Engineering Fracture Mechanics, 78(6), pp.1156-1168.

Hu, W., Ha, Y.D. and Bobaru, F., 2011. Modeling dynamic fracture and damage in a fiber-reinforced composite lamina with peridynamics. International Journal for Multiscale Computational Engineering, 9(6).

Hu, W., Ha, Y.D. and Bobaru, F., 2012. Peridynamic model for dynamic fracture in unidirectional fiber-reinforced composites. Computer Methods in Applied Mechanics and Engineering, 217, pp.247-261.

Bobaru, F. and Hu, W., 2012. The meaning, selection, and use of the peridynamic horizon and its relation to crack branching in brittle materials. International journal of fracture, 176(2), pp.215-222.

Bobaru, F., Ha, Y. and Hu, W., 2012. Damage progression from impact in layered glass modeled with peridynamics. Open Engineering, 2(4), pp.551-561.

Seleson, P. and Parks, M., 2011. On the role of the influence function in the peridynamic theory. International Journal of Multiscale Computational Engineering, 9(6), pp.689-706.

Weckner, O. and Silling, S.A., 2011. Determination of nonlocal constitutive equations from phonon dispersion relations. International Journal for Multiscale Computational Engineering, 9(6).

Silling, S.A. and Askari, E., 2005. A meshfree method based on the peridynamic model of solid mechanics. Computers & structures, 83(17), pp.1526-1535.

Silling, S.A., Epton, M., Weckner, O., Xu, J. and Askari, E., 2007. Peridynamic states and constitutive modeling. Journal of Elasticity, 88(2), pp.151-184.

Hu, W., 2012. Peridynamic models for dynamic brittle fracture.


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