A buckling solution and a non-linear post buckling solution were employed for the wrinkling analysis of a tensioned Kapton square membrane. The buckling solution with significantly reduced bending stiffness creates localized buckling modes accounting for the wrinkle formation in the membrane. The non-linear post buckling solution with an updated Lagrangian scheme describes the detailed wrinkle ...

BACKGROUND During routine surgical treatment of basal cell carcinomas (BCCs), we observed an apparent inverse relationship between the presence of a BCC and significant wrinkling of the face. To ascertain the veracity of this observation, we performed a clinical and questionnaire-based case-referent study. OBSERVATION One hundred eighteen successive white patients (mean +/- SD age, 71.9 +/- 9...

We study the deflection by gravity of a circular elastic disk deposited on rigid support. The axisymmetric induces compressive orthoradial stresses which leads to wrinkling instability above critical threshold dimensionless force. this combination experiments, numerical simulations and analytical tools, with particular focus role geometry. show that aspect ratio is crucial parameter controls bo...

Surface Wrinkling In article number 2203491, Qingshan Wei, Yong Zhu, Seung Goo Lee, and co-workers summarize the recent advances in flexible stretchable sensors based on surface wrinkling, which provides an effective alternative to improve both sensing performance mechanical deformability of sensors. The detailed fundamental mechanics wrinkle formation, geometry control strategies, fabricating ...

BACKGROUND Although cosmetic procedures have a significant impact on certain aspects of aging, such as deep, wrinkling, sagging, and volume loss, they fail to address the overall quality of the skin. METHODS Daily skincare routines potentially can have a significant long-term impact on the overall quality of a person's complexion. RESULTS By expanding our product knowledge, we can help our ...

Hyperornithinaemia gyrate atrophy (HOGA) is a rare autosomal recessive disorder in which chorioretinal degeneration occurs with cataracts, myopia, and hyperornithinaemia. We report the case of an 18-year-old female who presented with the typical features of HOGA, including posterior subcapsular cataracts and elevated plasma ornithine. She later developed distorted vision in both eyes owing to w...

This paper presents a bilayer model to account for surface effects on the wrinkling of ultrathin polymer films. Assuming a surface layer of finite thickness, effects of surface properties on the critical strain, the equilibrium wavelength, and the wrinkle amplitude are discussed in comparison with conventional analysis. Experimental measurements of wrinkling in polymer films with thickness rang...

The author neglected to cite a previously published related paper which reports that, when partially polymerized membranes suffer a wrinkling transition, the distribution of wrinkles is lognormal 1. In addition, some of the data reported in the manuscript were previously reported in reference 1. The data in Figure 1 are taken from Figure 3a and Figure 5 in ref. 1; Figure 2b is adapted from Figu...

Metal curtain walls have been used to decorate the interiors and exteriors of large buildings. Most exteriors used in performing surface modeling of large buildings are linked or pieced by quadric surface. This surface, which is non-expansible, will cause wrinkling when stamped and used as a flat sheet metal of a metal curtain wall. These wrinklings are not distributed effectively because of th...

New results are presented for the nite element analysis of wrinkling in curved elastic membranes undergoing large deformation. Concise continuum level governing equations are derived in which singularities are eliminated. A simple and e cient algorithm with robust convergence properties is established to nd the real strain and stress of the wrinkled membrane for Hookean materials. The continuum...