Research on elastic-damping properties of unit loads

• Autorzy: Piątkowski T.
• Języki publikacji: EN

Abstrakty

EN

In the paper, the results of tests of free-fall of unit load (cubicoidal package) from a height on the stiff ground are presented. The aim of this study is to determine the elastic-damping properties of packaging for all surfaces, edges and corners. These tests allow us to evaluate the protective ability of packages in case of impact in any direction typical for real transport systems. The maximum accelerations registered during experimental tests are subjected to approximation by means of B-spline surface. It enables the visual interpretation of data in three-dimensional space, allowing detection critical packaging places for the safety of transported goods. In addition, the registered acceleration waveforms were used to determine the coefficients of: restitution, damping and rigidity. These parameters are required to the analytical descriptions of loads contact with obstacles - such as in the models of sorting or positioning processes of packagings.

Słowa kluczowe

EN

free fall test; impact; damping coefficient; restitution coefficient

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2013
• Tom: Vol. 8, no 3
• Strony: 75--81
• Opis fizyczny: Bibliogr. 21 poz., rys., wykr.

Twórcy

autor

Piątkowski T.

• University of Technology and Life Sciences ul. Prof. S. Kaliskiego 7, 85-789 Bydgoszcz, Poland tel.: [phone]

Bibliografia

• [1] ASTM D1596 – 97(2003), Standard test method for dynamic shock cushioning characteristics of packaging material.
• [2] ASTM D3332 – 99(2010), Standard test methods for mechanical-shock fragility of products, using shock machines.
• [3] ASTM D4169 – 09, Standard practice for performance testing of shipping containers and systems.
• [4] ASTM D5276 – 98(2009), Standard test method for drop test of loaded containers by free fall.
• [5] Foley, J.D., Introduction to Computer Graphics, WNT, Warsaw 2001.
• [6] Gryboś R., The theory of impact in discrete mechanical systems, PWN, Warsaw 1969.
• [7] Herbert H., Schueneman H., Packaging engineering, design and testing. A step-by-step approach for protection of fragile products, Westpak Inc., San Jose (USA), www.westpak.com (accessed 2012-04-14).
• [8] Huang H., Dallimore M.P., Pan J., McCormick P.G., An investigation of the effect of powder on the impact characteristics between a ball and a plate using free falling experiments, Materials Science & Engineering, 1998, 241, 38-47.
• [9] Huang H., Dallimore M.P., Pan J., McCormick P.G., An investigation of the effect of powder on the impact characteristics between a ball and a plate using free falling experiments, Materials Science & Engineering, 1998, 241, 38-47.
• [10] ISO 2248:1985, Packaging – Complete, filled transport packages – Vertical impact test by dropping.
• [11] ISO 4180:2009, Packaging – Complete, filled transport packages – General rules for the compilation of performance test schedules.
• [12] Kiciak, P., Basis of curves and surfaces modelling. Applications in computer graphics, WNT, Warsaw, 2005.
• [13] Low K.H., Drop-impact cushioning effect of electronics products formed by plates, Advances in Engineering Software, 2003, 34, 31-50.
• [14] Piatkowski T., Active fence with flexible link, Journal of Theoretical and Applied Mechanics, 2010, 48(6), 87-109.
• [15] Piatkowski T., Sempruch J., Model of the process of load unit stream sorting by means of flexible active fence, Mechanism and Machine Theory, 2008, 43(5), 549-564.
• [16] Piatkowski T., Sempruch J., Model of inelastic impact of unit loads. Packaging Technology and Science, 2009, 22(1), 39-51.
• [17] Piatkowski T., Sempruch J., Tomaszewski T., Spatial approximation of impact test results of unit load. Journal of POLISH CIMAC, 2012, 3 (7), 243-251.
• [18] Rajalingham C., Rakheja S., Analysis of impact force variation during collision of two bodies using a single-degree-of-freedom system model., Journal of Sound and Vibration, 2000, 229(4), 823-835.
• [19] Shene, C. K., De Boor’s algorithm, http://www.cs.mtu.edu/~shene/COURSES/cs3621/NOTES/spline/de-Boor.html (accessed 2012-04-14).
• [20] Thornton C., Coefficient of restitution for collinear collisions of elastic-perfectly plastic spheres, ASME Journal of Applied Mechanics, 1997, 64, 383-386.
• [21] Zhang D., Whiten W. J., The calculation of contact forces between particles using spring and damping models, Powder technology, 1996, 5, 59-64.