2010
DOI: 10.1103/physrevlett.105.038303
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Draping Films: A Wrinkle to Fold Transition

Abstract: A polymer film draping over a point of contact will wrinkle due to the strain imposed by the underlying substrate. The wrinkle wavelength is dictated by a balance of material properties and geometry; most directly the thickness of the draping film. At a critical strain, the stress in the film will localize, causing hundreds of wrinkles to collapse into several discrete folds. In this Letter, we examine the deformation of an axisymmetric sheet and quantify the force required to generate a fold. We observe that … Show more

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Cited by 122 publications
(128 citation statements)
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“…For a thin elastic film supported on a viscous substrate, wrinkles lose their periodicity and transition to localized folds once the total confinement of the thin film approaches one third of the initial wrinkling wavelength [33,34] . The transition to localized deformation may even lead to the fracture of the film [35] .…”
Section: Introductionmentioning
confidence: 99%
“…For a thin elastic film supported on a viscous substrate, wrinkles lose their periodicity and transition to localized folds once the total confinement of the thin film approaches one third of the initial wrinkling wavelength [33,34] . The transition to localized deformation may even lead to the fracture of the film [35] .…”
Section: Introductionmentioning
confidence: 99%
“…Although Eq. 1 may be relevant also for more complex types of wrinkle patterns [e.g., under biaxial compression (20) or depressurizing a shell with a stiff core (21)], confinement of sheets in the absence of an imposed tension often leads to patterns with deep folds or stressfocusing zones (22)(23)(24), rather than to the oscillatory wrinkles described by Eqs. 1 and 2 and manifested in the following experimental examples.…”
Section: Theorymentioning
confidence: 99%
“…This simple analysis was developed for the ill defined 'near threshold' regime, although for reasons that are not yet clear the analysis seems to be accurate in many situations that are clearly no longer small perturbations [6]. Larger displacements (the so called far from threshold regime) currently challenges elastic theory for a solution, which has prompted significant experimental and theoretical efforts [7,8,20,21]. The far from threshold work often investigates aspects of stress focusing [5], deformations in which the stress distributions become strongly heterogeneous and notably similar to more general types of material failure (e.g.…”
mentioning
confidence: 99%