Abstract
Advanced polymeric materials are finding an increasing range of industrial and defence applications. These materials have the potential to improve combat survivability, whilst reducing the cost and weight of armour systems. In this paper the results from a split Hopkinson pressure bar (SHPB) test of a high density polyethylene (HDPE) sample involving multiple stress waves is discussed with aid of a finite element model of the test. It is seen that the phenomenon of impedance mismatch at interfaces plays an important role in the levels of stress and deformation seen in the sample. A multi-layer armour system is then investigated using the finite element model. This case study illustrates the role of impedance mismatch and interface engineering in the design and optimisation of armour solutions.
[1] Samadhiya R., Mukherjee A., Schmauder S., Characterization of discretely graded materials using acoustic wave Propagation., J. Comput. Mater. Sci., 2006; 37(1–2), 20–28 http://dx.doi.org/10.1016/j.commatsci.2005.12.03610.1016/j.commatsci.2005.12.036Search in Google Scholar
[2] Abrate S., Wave propagation in lightweight composite armour, J. Phys., IV 2003; 110, 657–662 10.1051/jp4:20020768Search in Google Scholar
[3] Mines R., A one-dimensional stress wave analysis of a lightweight composite armour, Int. J. Compos. Struct., 2004; 64(1), 55–62 http://dx.doi.org/10.1016/S0263-8223(03)00213-710.1016/S0263-8223(03)00213-7Search in Google Scholar
[4] Li Y., Ramesh KT., Chin E.S.C., Dynamic characterization of layered and graded structures under impulsive loading, Int. J. Solids Struct., 2001, 38(34–35), 6045–6061 http://dx.doi.org/10.1016/S0020-7683(00)00364-410.1016/S0020-7683(00)00364-4Search in Google Scholar
[5] Vaidya K., Abraham A., Bhide S., Affordable processing of thick section and integral multi-functional composites, Compos. Part A: Appl. Sci. Manuf., 2001, 32(8), 1133–1142 http://dx.doi.org/10.1016/S1359-835X(01)00033-110.1016/S1359-835X(01)00033-1Search in Google Scholar
[6] Stronge W., Impact Mechanics, Cambridge University press, Cambridge, 2000 http://dx.doi.org/10.1017/CBO978051162643210.1017/CBO9780511626432Search in Google Scholar
[7] Meyers M., Murr L., Staudharmmer K., Fundamental Issues and Applications of Shock-wave and High Strain-rate Phenomenon, Elsevier Science Ltd., Oxford, 1980 Search in Google Scholar
[8] Kolsky H., An investigation of the mechanical properties of material at very high rates of strain, Proc. Phys. Soc. B62, 1949, 676–700 10.1088/0370-1301/62/11/302Search in Google Scholar
[9] Zhang M., Li Q., Huang F., Inertia-induced radial confinement in an elastic tubular specimen subjected to axial Strain acceleration, Int. J. Impact Eng., 37, 2010, 459–464 http://dx.doi.org/10.1016/j.ijimpeng.2009.09.00910.1016/j.ijimpeng.2009.09.009Search in Google Scholar
[10] Gorwade C., Ashcroft I., Hughes F., Cai D., Int. J. Appl. Mech. Mater., Vol. 70, 2011, 237–242, doi:10.4028 http://dx.doi.org/10.4028/www.scientific.net/AMM.70.23710.4028/www.scientific.net/AMM.70.237Search in Google Scholar
[11] Wang Y., Wang F., Yu X., Ma Z., et al., Effect of interlayer on stress wave propagation in CMC/RHA multi-layered Structure, J. Comp. Sci. Tech., 70, 2012, 1669–1673 http://dx.doi.org/10.1016/j.compscitech.2010.04.01410.1016/j.compscitech.2010.04.014Search in Google Scholar
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