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On the behaviour characterization of metallic cellular materials under impact loading 被引量:3

On the behaviour characterization of metallic cellular materials under impact loading
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摘要 This paper reviews the common mechanical features of the metallic cellular material under impact loading as well as the characterization methods of such behaviours. The main focus is on the innovations of various testing methods at impact loading rates.Following aspects were discussed in details.(1) The use of soft nylon Hopkinson/Kolsky bar for an enhanced measuring accuracy in order to assess if there is a strength enhancement or not for this class of cellular materials under moderate impact loading;(2) The use of digital image correlations to determine the strain fields during the tests to confirm the existence of a pseudo-shock wave propagation inside the cellular material under high speed impact: (3) The use of new combined shear compression device to determine the loading envelop of cellular materials under impact multiaxial loadings. This paper reviews the common mechanical features of the metallic cellular material under impact loading as well as the characterization methods of such behaviours. The main focus is on the innovations of various testing methods at impact loading rates.Following aspects were discussed in details.(1) The use of soft nylon Hopkinson/Kolsky bar for an enhanced measuring accuracy in order to assess if there is a strength enhancement or not for this class of cellular materials under moderate impact loading;(2) The use of digital image correlations to determine the strain fields during the tests to confirm the existence of a pseudo-shock wave propagation inside the cellular material under high speed impact: (3) The use of new combined shear compression device to determine the loading envelop of cellular materials under impact multiaxial loadings.
出处 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2010年第6期837-846,共10页 力学学报(英文版)
关键词 Foam HONEYCOMB LATTICE Hopkinson bar Rate sensitivity Foam Honeycomb Lattice Hopkinson bar Rate sensitivity
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