{"title":"High Strain Rate Characteristics of the Advanced Blast Energy Absorbers","authors":"Martina Drdlov\u00e1, Michal Frank, Jaroslav Buchar, Josef Kr\u00e1tk\u00fd","volume":94,"journal":"International Journal of Materials and Metallurgical Engineering","pagesStart":1069,"pagesEnd":1073,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/9999391","abstract":"
The main aim of the presented experiments is to
\r\nimprove behaviour of sandwich structures under dynamic loading,
\r\nsuch as crash or explosion. Several cellular materials are widely used
\r\nas core of the sandwich structures and their properties influence
\r\nthe response of the entire element under impact load. To optimize
\r\ntheir performance requires the characterisation of the core material
\r\nbehaviour at high strain rates and identification of the underlying
\r\nmechanism. This work presents the study of high strain-rate
\r\ncharacteristics of a specific porous lightweight blast energy absorbing
\r\nfoam using a Split Hopkinson Pressure Bar (SHPB) technique
\r\nadapted to perform tests on low strength materials. Two different
\r\nvelocities, 15 and 30 m.s-1 were used to determine the strain
\r\nsensitivity of the material. Foams were designed using two types of
\r\nporous lightweight spherical raw materials with diameters of 30-
\r\n100 *m, combined with polymer matrix. Cylindrical specimens with
\r\ndiameter of 15 mm and length of 7 mm were prepared and loaded
\r\nusing a Split Hopkinson Pressure Bar apparatus to assess the relation
\r\nbetween the composition of the material and its shock wave
\r\nattenuation capacity.<\/p>\r\n","references":"[1] N. Gupta. and V. C. Shunmugasamy, Mater. Sci. Eng. A, vol. 528,\r\npp. 7596\u20137605, 2011.\r\n[2] N. Gupta. V. C. Shunmugasamy, Q. Nguyen and P. G. Coelho,\r\nMater. Sci. Eng. A, vol. 527, pp. 6166\u20136177, 2010.\r\n[3] P. H. Viot, K. Shankar and D. Bernard, Compos. Struct., vol. 86,\r\npp. 314\u2013327, 2008.\r\n[4] E. Woldesenbet, N. Gupta. and A. Jadhav, Journal of Materials Science,\r\nvol. 40, pp. 4009\u20134017, 2005.\r\n[5] H. Guohe, Y. Demei, Materials Science and Engineering, vol. 528,\r\npp. 5177-5183, 2011","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 94, 2014"}