A constitutive model for paperboard including wrinkle prediction and post-wrinkle behavior applied to deep drawing
نویسندگان
چکیده
منابع مشابه
Nasolabial Wrinkle Classification
Categorization of facial wrinkles is used in dermatology studies to determine the efficacy of a certain treatment over a certain period of time. These studies, however, are limited by the fact that when dermatologists assign these categorizations, it is done so through qualitative, in-vivo observation. The objective of this study was to train a computer to categorize nasolabial wrinkles into on...
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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...
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BACKGROUND The number of existing wrinkle assessment scales makes it difficult to compare the efficacy of cosmetic techniques in rejuvenating photoaged skin. A single and simple assessment scale that reliably quantifies wrinkle depth is needed. OBJECTIVE The objective was to validate the Modified Fitzpatrick Wrinkle Scale (MFWS) as a nasolabial wrinkle severity assessment tool. METHODS AND ...
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This paper describes a dynamic model to simulate expressive wrinkles in 3D facial animation and skin aging. A skin surface is defined that can slide over an underlying layer, which constrains the surface by a spring force that simulates the connective fat tissue between them. Muscle masks are constructed to characterize the muscular contractions that provide the facial movement. Skin deformatio...
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On length scales from nanometres to metres, partial adhesion of thin films with substrates generates a fascinating variety of patterns, such as 'telephone cord' buckles, wrinkles, and labyrinth domains. Although these patterns are part of everyday experience and are important in industry, they are not completely understood. Here, we report simulation studies of a previously-overlooked phenomeno...
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ژورنال
عنوان ژورنال: International Journal of Solids and Structures
سال: 2017
ISSN: 0020-7683
DOI: 10.1016/j.ijsolstr.2017.03.029