Summary
The problem of non-scalability of structures under impact loads caused by strain-rate effects is solved in this article by properly correcting the impact velocity. The technique relies on the use of an alternative dimensionless basis, together with a mathematical model which allows the calculation of a correction factor for the impact velocity. This new velocity, when applied to the model, makes it to assure the satisfaction of the scaling laws. The indirect similitude method detailed here is applied to two strain-rate sensitive structures, a double plate under in-plane impact and a beam subjected to a blast load. The results show a very good agreement so that the model and a prototype made from strain rate sensitive materials behave the same.
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References
Alves, M.: Material constitutive law for large strains and strain rates. J Eng Mech 126(2) (2000) 215–218
Alves, M.;Jones, N.: Impact failure of beams using damage mechanics: Part I—Analtical model. Int J Impact Eng 27(8) (2002) 837–861
Baker, W.; Westine, P.; Dodge, F.: Similarity methods in engineering dynamics. Elsevier
Booth, E.;Collier, D.;Miles, J.: Impact scalability of plated steel structures. In: Jones, N., Wierzbicki, T. (eds.) Structural crashworthiness. Butterworths, London (1983) pp. 136–174
Calladine, C.;English, R.: Strain rate and inertial effects in the collapse of two types of energy-absorbing structure. Int J Mech Sci 26 (1986) 689–701
Calladine, R.: An investigation of impact scaling theory (appendix). In: Jones, N., Wierzbicki, T. (eds.), Structural crashworthiness, Butterworths, London (1983) pp. 169–174
Carpinteri, A.: Size-scale effects in the failure mechanisms of materials and structures. E & FN Spon, London (1996)
Drazetic, P.;Ravalard, Y.;Dacheux, F.;Marguet, B: Applying non-direct similitude technique to the dynamic bending collapse of rectangular section tubes. Int j Impact Eng 15(6) (1994) 797–814
Duffey, T.: Scaling laws for fuel capsules subjected to blast, impact and thermal loading. In: Proc of the Intersociety Energy Conversion Eng Conference. SAE, (1971) pp. 775–786
Duffey, T.;Cheresh, M.;Sutherland, S.: Experimental veification of scaling laws for punch-impact-loaded structures. Int J Impact Eng 2(2) (1984) 103–117
Hu, Y.: Application of response number for dynamic plastic response of plates subjected to impulsive loading. Int J Pressure Vessels Piping 77 (2000) 711–714
Jones, N.: Scaling of inelastic structures loaded dynamically. In: Davies, G. (ed.), Structural impact and crashworthiness. Elsevier Appl Sci (1984), pp. 45–74
Jones, N.: Structural impact. Cambridge University Press, Cambridge (1989)
Jones, N.; Jouri, W.; Birch, R.: On the scaling of ship collision damage. In: Third Int Congress on Marine Technology. Athens, (1984), pp. 287–294
Li, Q.;Jones, N.: On dimensionless number for dynamic plastic response of structural members. Arch Appl Mech 70 (2000) 245–254
Nurick, G.;Martin, J: Deformation of thin plates subjected to impulsive loading—a review, Part II: Experimental studies. Int J Impact Eng 8 (1989) 171–186
Shi, X.;Gao, Y.: Generalization of response number for dynamic plastic response of shells subjected to impulsive loading. Int J Pressure Vessels Piping 78 (2001) 453–459
Tam, L.;Calladine, C.: Inertia and strain-rate effects in a simple plate-structure inder impact loading. Int J Impact Eng 11 (1991) 349–377
Wen, H.;Jones, N.: Experimental investigation of the scaling laws for metal plates struck by large masses. Int J Impact Eng 13(3) (1993) 485–505
Zhang, T.;Yu, T.: A note on a velocity sensitive energy-absorbing structure. Int J Impact Eng 8 (1989) 43–51
Zhao, Y.: Suggestion of a new dimensionless number for dynamic plastic response of beams and plates. Arch Appl Mech 68 (1998) 524–538
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Oshiro, R.E., Alves, M. Scaling impacted structures. Arch. Appl. Mech. 74, 130–145 (2004). https://doi.org/10.1007/BF02637214
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DOI: https://doi.org/10.1007/BF02637214