000015460 001__ 15460
000015460 005__ 20161115100222.0
000015460 04107 $$aeng
000015460 046__ $$k2016-08-21
000015460 100__ $$aReis, Pedro
000015460 24500 $$aDefect-controlled buckling of depressurized elastic shells (INVITED)

000015460 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015460 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015460 506__ $$arestricted
000015460 520__ $$2eng$$aWe revisit the classic problem of buckling of spherical elastic shells under pressure loading, with an emphasis on determining the role that engineered imperfections have on the critical buckling pressure. Since the 1960’s numerous theoretical and computational studies have addressed this canonical Mechanics problem, but there is a striking lack of precision experiments to corroborate these predictions. We perform an experimental investigation where thin shells of nearly uniform thickness are fabricated by the coating of hemispherical molds with a polymer solution, which upon curing yields the elastic structure. Moreover, our manufacturing technique allows us to introduce a single dimple-like defect with controllable geometric properties. By systematically varying the amplitude of this defect (smaller than the thickness of the shell) we study the effect that these imperfections have on the buckling strength of our spherical shells. Small deviations from the spherical geometry result in large reductions in the buckling pressure and our experimental results agree well with existing theories. We then perform a broader exploration for other classes of defects, for which theoretical predictions are yet to be developed.

000015460 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015460 653__ $$a

000015460 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015460 720__ $$aReis, Pedro
000015460 8560_ $$ffischerc@itam.cas.cz
000015460 8564_ $$s89579$$uhttps://invenio.itam.cas.cz/record/15460/files/TS.SM14-4.01.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2800, code TS.SM14-4.01
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000015460 962__ $$r13812
000015460 980__ $$aPAPER