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Thematische Bibliographien / Wrinking effect / Zeitschriftenartikel

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Zeitschriftenartikel zum Thema „Wrinking effect“

Autor: Grafiati

Veröffentlicht am 29. Juni 2021

Zuletzt aktualisiert am 29. Juli 2025

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1

TSAI, N., and S. KIRKHAM. "Fingertip Skin Wrinkling – the Effect of Varying Tonicity." Journal of Hand Surgery 30, no. 3 (2005): 273–75. http://dx.doi.org/10.1016/j.jhsb.2004.12.010.

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Fingertip skin wrinkling after prolonged immersion in water is a well-recognized phenomenon, whereas a denervated digit does not exhibit normal skin wrinkling while a finger with a regenerated or repaired nerve shows at least partial reappearance of wrinkling. This is the basis for the bedside immersion-wrinkling test of autonomic digital nerve function. The exact mechanism of fingertip skin wrinkling is still subject to controversy. The purpose of this study was to investigate the relationship between the tonicity of a solution and the time elapsed to skin wrinkling. Fourteen healthy voluntee

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Zuo, Xiaogang, and Zhimin Lv. "Influence of Ironing Roller on the Wrinkling of a 4N6 Aluminum Foil during the Coiling Process of Cleaning Line." Metals 14, no. 9 (2024): 1073. http://dx.doi.org/10.3390/met14091073.

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Ironing roll is vital equipment in the production of wide aluminum foil, which has a significant impact on the wrinkling defects of aluminum foil during the winding process of the cleaning production line. In this paper, wrinkling defects in 4N6 aluminum foils were improved using the ABAQUS finite element software 2020. A dynamic simulation model of the aluminum foil winding process was established. The ethics model first analyzed the causes of wrinkling during the aluminum foil coiling process. Then the influence of each factor on aluminum foil wrinkling was studied for the effect of ironing

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Chen, Lu, and Shankar Kalyanasundaram. "Effect of Fiber Orientation on the Wrinkling Behavior of Thermoplastic Composite." Materials Science Forum 893 (March 2017): 21–25. http://dx.doi.org/10.4028/www.scientific.net/msf.893.21.

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In this work, experiments were conducted to examine the impact of fiber orientation of self-reinforced polypropylene on wrinkling phenomenon. Defects due to wrinkling are major quality issues in rapid forming of sheet materials. This article examines the influence of two fiber orientations [0°/90° and 45°/-45°] on wrinkling initiation of a self-reinforced polypropylene composite (Curv®) material system. It was found that 45°/-45° specimen wrinkles at smaller axial displacement compared to 0°/90° specimen. In both specimens, there was an abrupt change in strain increment ratio that corresponded

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Hematian, J., and P. M. Wild. "Initial imperfections and the initiation of wrinkling in finite element modelling of deep drawing." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 214, no. 1 (2000): 63–73. http://dx.doi.org/10.1243/0954408001530227.

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The effect of initial imperfections on the initiation of wrinkling in finite element models of deep drawing operations is assessed. Models of an annular plate are subjected to radial in-plane loading and the effects of different types, magnitudes and distributions of imperfections are investigated. A model of a circular plate subjected to out-of-plane loading from a punch and die is similarly investigated and the results are compared with experimental data. It is confirmed that initial imperfections are an essential requirement for the initiation of wrinkling for the case of in-plane loading.

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Alawiye, Hamza, Ellen Kuhl, and Alain Goriely. "Revisiting the wrinkling of elastic bilayers I: linear analysis." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377, no. 2144 (2019): 20180076. http://dx.doi.org/10.1098/rsta.2018.0076.

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Wrinkling is a universal instability occurring in a wide variety of engineering and biological materials. It has been studied extensively for many different systems but a full description is still lacking. Here, we provide a systematic analysis of the wrinkling of a thin hyperelastic film over a substrate in plane strain using stream functions. For comparison, we assume that wrinkling is generated either by the isotropic growth of the film or by the lateral compression of the entire system. We perform an exhaustive linear analysis of the wrinkling problem for all stiffness ratios and under a v

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Wang, Xiaofeng, Xujing Cao, and Qingshan Yang. "Effect of Wrinkling on the Bearing Capacity of Inflated ETFE Membranes." Journal of the International Association for Shell and Spatial Structures 65, no. 1 (2024): 57–69. http://dx.doi.org/10.20898/j.iass.2024.003.

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Inflated membranes are flexible structures and very sensitive to wind load. Wrinkling deformation of the enveloping membrane can further intensify the trend of wind-induced damage. This paper aims at studying the effect of wrinkling deformation on the bearing capacity of inflated membranes under wind. The wrinkling model based on the stability theory of plates and shells is adopted to consider the effect of wrinkling deformation. The air-membrane interaction is also included by treating the internal air as a kind of potential-based fluid. The wind load is simplified as a uniformly distributed

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Ma, Jiayi, Yucheng Wang, Chunju Wang, Haidong He, Feng Chen, and Lining Sun. "Experimental Study on Anti-Wrinkling Performance of TA1 Titanium Thin Sheet Assisted by Ultrasonic Vibration." Materials 18, no. 7 (2025): 1439. https://doi.org/10.3390/ma18071439.

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TA1 titanium bipolar plates for hydrogen fuel cells are prone to plastic instability phenomena such as wrinkling during the stamping process, which adversely affects the forming quality. This study applies an ultrasonic-vibration energy field, aligned with the direction of stretching, in a plate diagonal tensile testing scenario based on the Blaha effect. The impact of varying thicknesses and vibration amplitudes on the anti-wrinkling performance of TA1 titanium sheets is investigated. Through a combined analysis of load–displacement curves and wrinkle height measurements using a super-depth-o

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Li, Zhikun, and Hui Long. "Investigation of Wrinkling Initiation in Shear Spinning." MATEC Web of Conferences 408 (2025): 01040. https://doi.org/10.1051/matecconf/202540801040.

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Metal spinning is a flexible and net-shape sheet forming process however its process development still heavily relies on empirical knowledge to determine process parameters to avoid processing failures, such as wrinkling. This paper develops dynamic finite element modelling of a shear spinning process to investigate wrinkling initiation and critical strains leading to wrinkling. Two processing parameters, mandrel rotational speed and roller feed rate, in spinning aluminium sheet material AA5251-H22 are investigated to ascertain the effect of the roller feed ratio on wrinkling, validated by a s

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Fagerberg, L. "The effect of local bending stiffness on the wrinkling of sandwich panels." Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment 217, no. 2 (2003): 111–19. http://dx.doi.org/10.1243/147509003321921355.

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The use of the face sheet elastic modulus versus the face sheet local bending stiffness while designing against wrinkling is discussed in this paper. It shows that there are several ways to improve the critical wrinkling load of a sandwich panel without replacing the core. It is often possible to increase the wrinkling load by as much as 25 per cent without virtually any increase in weight or cost of the sandwich. This is achieved by improving the local bending stiffness of the sandwich face sheet by either optimizing the stacking sequence, lowering the fibre volume fraction or adding some ext

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ZHANG, YONGJU, PINGGEN CAI, LI ZHANG, and SENJIANG YU. "MULTIMODE WRINKLING PATTERNS OF IRON FILMS SPUTTER DEPOSITED ON FLEXIBLE SUBSTRATES WITH GRADIENT MODULUS." Surface Review and Letters 28, no. 05 (2021): 2150035. http://dx.doi.org/10.1142/s0218625x21500359.

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Wrinkling patterns are beneficial for a wide range of engineering applications including flexible electronics, tuned optics, sensoring, energy harvesting, surface wetting and biomedicine. Here we report on controllable multimode wrinkling patterns of metal (iron) films sputter deposited on flexible substrates with gradient modulus. It is found that disordered wrinkles (G1 wrinkling) form in the weakly crosslinking region at the early stage of film deposition. Disordered labyrinth wrinkles with larger wavelengths and ordered stripe wrinkles localized by cracks (both G2 wrinkling) appear in the

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Hall, S. M., and S. G. Haworth. "Effect of cold preservation on pulmonary arterial smooth muscle cells." American Journal of Physiology-Lung Cellular and Molecular Physiology 270, no. 3 (1996): L435—L445. http://dx.doi.org/10.1152/ajplung.1996.270.3.l435.

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The efficacy of preservation fluids on the cytoskeleton and contractile function of porcine pulmonary arterial smooth muscle (SM) cells during cooling and rewarming was evaluated, using EuroCollins solution (EC), University of Wisconsin solution (UW), Marshall's solution (MS), and tissue culture growth medium (GM). Functional studies included passive distensibility and contraction to prostaglandin F2a (PGF2a) in arterial rings and wrinkling of silicone membranes by cooled-rewarmed cultured SM cells. Immunofluorescence measurements were made of actin brightness in cooled arterial rings. Culture

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Wang, Xiaofeng, Haoyue Chu, and Qingshan Yang. "Numerical Analysis of Wind-Induced Response of a Wrinkled Membrane." International Journal of Structural Stability and Dynamics 20, no. 05 (2020): 2050056. http://dx.doi.org/10.1142/s021945542050056x.

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Membranes have been popularly used in the fields of civil engineering and aerospace engineering. When wrinkled, a membrane loses its stiffness in the direction perpendicular to wrinkles and is more sensitive to wind loads. This paper numerically studied the wind-induced responses of a wrinkled membrane and their variations with respect to wind speed, wind direction and wrinkling deformation. Based on the stability theory of plates and shells, the wrinkling deformation of a rectangular membrane under shear was obtained by post-buckling analysis. Then, by using the wind load derived from a wind

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Wang, Bowen, Juanjuan Wang, Xue Han, and Conghua Lu. "Light-Induced Surface Wrinkling on Azo-Based Composite Films." Coatings 12, no. 5 (2022): 608. http://dx.doi.org/10.3390/coatings12050608.

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Here we report a simple micro/nano patterning strategy based on light-induced surface wrinkling. Namely, we fabricated a film/substrate system composed of polydimethylsiloxane (PDMS) as a soft substrate and non-photosensitive polymer polystyrene (PS) mixed with azo-polymer (polydisperse orange 3, PDO3) as a stiff film. Taking advantage of the photo-thermal effect and photo-softening effect of PDO3, we fabricated various microstructured wrinkling morphologies by a simple light illumination. We investigated the influence of two exposure modes (i.e., static selective exposure and dynamic moving e

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Huang, Jianzhang, and Qiang Han. "A Molecular Dynamics Study on Wrinkles in Graphene with Simply Supported Boundary under In-Plane Shear." Journal of Nanomaterials 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/1326790.

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The formation and evolution mechanisms of wrinkling in a rectangular single layer graphene sheet (SLGS) with simply supported boundary subjected to in-plane shear displacements are investigated using molecular dynamics simulations. Through investigating the out-of-plane displacements of the key point atom, we clarify the wrinkling growth and propagation process. Our results show that the boundary condition plays important roles in the wrinkling deformation. And the dependence of wrinkling parameters on the applied shear displacements is captured. Based on the elasticity theory, the formation m

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Balamurugan, G. Prasath, Rohan N. Pukadyil, Mahdy M. Malayery, et al. "Thermal wrinkling behavior of formable decorative film laminates." Journal of Plastic Film & Sheeting 33, no. 3 (2016): 290–308. http://dx.doi.org/10.1177/8756087916663031.

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This paper focuses on wrinkle development in decorative film laminates during heating operations with the goal to understand their driving factors and develop strategies to overcome such defects. The study looked at temperature and heating rate effects on the wrinkling behavior of a commercial black-out film laminated onto a metal substrate. The 135℃ threshold temperature identified for our film under which no wrinkles formed, related to the stiffness of its different construction layers. Heating rate was also noted by this study to be an important parameter in wrinkling; values between 1℃ and

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Zanjani, Nima A., and Shankar Kalyanasundaram. "Wrinkling Phenomenon during Uniaxial Extension of a Woven Thermoplastic Composite." Advanced Composites Letters 24, no. 5 (2015): 096369351502400. http://dx.doi.org/10.1177/096369351502400501.

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In the current research, wrinkling behaviour of a pre-consolidated woven self-reinforced polypropylene (SRPP) composite is investigated. Specimens possessing different aspect ratios were uniaxially extended at room temperature. Principal strains were recorded by a 3D optical photogrammetric system. Continuous measurement of out-of-plane displacements and induced in-plane strains elucidated the effect of specimens’ aspect ratios on wrinkling behaviour of SRPP composite. Investigating the evolution of meridian strains offered a valuable insight into development of principal strains before and af

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Huang, Jianzhang, and Qiang Han. "Wrinkling in Graphene Subjected to Gradient Tension." Nano 10, no. 03 (2015): 1550037. http://dx.doi.org/10.1142/s179329201550037x.

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In the present study, the initiation and evolution mechanisms of wrinkles in a square single layer graphene sheet (SLGS) under gradient tensile displacements are investigated based on molecular dynamics (MD) simulations. The mechanism of wrinkling process is elucidated by studying the atomic out-of-plane displacements development of the key atoms in SLGS. It reveals that the loading and boundary conditions play dominant roles in the wrinkling deformation of graphene. The dependences of the wrinkling amplitude, wavelength, out-of-plane displacement, direction angle and wrinkling area ratio on t

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Wang, L., H. Long, D. Ashley, M. Roberts, and P. White. "Effects of the roller feed ratio on wrinkling failure in conventional spinning of a cylindrical cup." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 225, no. 11 (2011): 1991–2006. http://dx.doi.org/10.1177/0954405410396024.

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In this study, wrinkling failure in conventional spinning of a cylindrical cup has been investigated by using both finite element (FE) analysis and experimental methods. FE simulation models of a spinning experiment have been developed using the explicit finite element solution method provided by the software Abaqus. The severity of wrinkles is quantified by calculating the standard deviation of the radial coordinates of element nodes on the edge of the workpiece obtained from the FE models. The results show that the severity of wrinkles tends to increase when increasing the roller feed ratio.

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Wang, Ruonan, Haosheng Pang, Minglin Li, and Lianfeng Lai. "Atomic Simulation of Nanoindentation on the Regular Wrinkled Graphene Sheet." Materials 13, no. 5 (2020): 1127. http://dx.doi.org/10.3390/ma13051127.

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Surface landscapes have vague impact on the mechanical properties of graphene. In this paper, single-layered graphene sheets (SLGS) with regular wrinkles were first constructed by applying shear deformation using molecular dynamics (MD) simulations and then indented to extract their mechanical properties. The influence of the boundary condition of SLGS were considered. The wrinkle features and wrinkle formation processes of SLGS were found to be significantly related to the boundary conditions as well as the applied shear displacement and velocity. The wrinkling amplitude and degree of wrinkli

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Nardinocchi, P., and E. Puntel. "Swelling-induced wrinkling in layered gel beams." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 473, no. 2207 (2017): 20170454. http://dx.doi.org/10.1098/rspa.2017.0454.

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Gels are widely employed in smart mechanical devices and biomedical applications. Swelling-induced bending actuation can be obtained by means of a simple bilayer gel beam. We show that this system can also exhibit wrinkling patterns of potential interest for structural morphing and sensing. We study swelling-induced wrinkling at the extrados of a bilayer gel beam with the softer layer on top. The bent configuration at finite strain is recovered first and, starting from it, a linear perturbation analysis is performed. We delimit the zone corresponding to wrinkling modes in a parameter plane enc

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Donaldson, Laurie. "Wrinkling and crumpling graphene to good effect." Materials Today 19, no. 5 (2016): 247. http://dx.doi.org/10.1016/j.mattod.2016.04.014.

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Liu, Hong, Hugh Gong, Pinghua Xu, Xuemei Ding, and Xiongying Wu. "The mechanism of wrinkling of cotton fabric in a front-loading washer: The effect of mechanical action." Textile Research Journal 89, no. 18 (2019): 3802–10. http://dx.doi.org/10.1177/0040517518821909.

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In order to understand the impact of mechanical action on the wrinkling of cotton fabrics in a drum washer, fabric movement was observed and a movement index system was developed to characterize the textile motion. Results showed that spinning speed and wash load were the major factors influencing the smoothness of cotton fabrics, with p values of 0.000 and 0.032, respectively. The analysis of fabric movement illustrated that when the wash load increased, the free motion region decreased and the ratio of passive motion region increased, resulting in severe wrinkling of cotton fabric. A regress

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Bamdad, AH, and R. Hashemi. "Analytical and numerical investigation of wrinkling limit diagram in deep drawing of two-layer sheets with experimental verification." Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications 235, no. 5 (2021): 974–90. http://dx.doi.org/10.1177/1464420720985315.

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Wrinkling, which is primarily caused by insufficient blank holder force, is a significant issue that induces inconsistencies in forming parts, particularly in the deep drawing process. In this article, an investigation of the wrinkling in the deep drawing process of two-layer sheets is performed through an analytical approach, numerical method, and experimental tests. Increasing in the blank holder force, the process is under control by the proposed algorithm. Consequently, it aims to find the minimum required blank holder force to avoid wrinkling. The energy technique is utilized to predict t

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Box, Finn, Doireann O’Kiely, Ousmane Kodio, Maxime Inizan, Alfonso A. Castrejón-Pita, and Dominic Vella. "Dynamics of wrinkling in ultrathin elastic sheets." Proceedings of the National Academy of Sciences 116, no. 42 (2019): 20875–80. http://dx.doi.org/10.1073/pnas.1905755116.

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The wrinkling of thin elastic objects provides a means of generating regular patterning at small scales in applications ranging from photovoltaics to microfluidic devices. Static wrinkle patterns are known to be governed by an energetic balance between the object’s bending stiffness and an effective substrate stiffness, which may originate from a true substrate stiffness or from tension and curvature along the wrinkles. Here, we investigate dynamic wrinkling induced by the impact of a solid sphere onto an ultrathin polymer sheet floating on water. The vertical deflection of the sheet’s center

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Seok, Seonho, HyungDal Park, Philippe Coste, and Jinseok Kim. "Direct Numerical Simulation of Surface Wrinkling for Extraction of Thin Metal Film Material Properties." Micromachines 14, no. 4 (2023): 747. http://dx.doi.org/10.3390/mi14040747.

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This paper presents a direct numerical simulation for the extraction of material properties based on thin-film wrinkling on scotch tape. Conventional FEM-based buckling simulation sometimes requires complex modeling techniques concerning mesh element manipulation or boundary conditions. The direct numerical simulation differs from FEM (finite element method)-based conventional two-step linear–nonlinear buckling simulation in that mechanical imperfections are directly applied into the elements of the simulation model. Hence, it can be performed in one step to find the wrinkling wavelength and a

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Hao, X. C., Y. L. Liu, and F. K. Gong. "Significant analysis of the influence of process parameters on the wrinkling of aluminum alloy double-wall gap tube in rotary draw bending." IOP Conference Series: Materials Science and Engineering 1270, no. 1 (2022): 012005. http://dx.doi.org/10.1088/1757-899x/1270/1/012005.

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Aluminum alloy double-wall gap tube is prone to wrinke in the rotary draw bending because the rigidity of the inner and outer tubes of the thin-walled structure is low, the mechanical properties between the tubes and the polymer filling medium are different greatly, and the bending forming is a complex nonlinear process of multi-mold coordination and multifactor coupling. While the process parameters are the main factors that affect the wrinkling of inner and outer tube, there are many process parameters and there are interactions among them. Therefore, based on the platform of ABAQUS/Explicit

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Sattar, Amer, Irfan Anjum Manarvi, and Manzar Masud. "Prediction of Wrinkling Initiation and Growth in Aluminum 5456-H116, Alloy Sheets by Finite Element Analysis of Yoshida Test." Applied Mechanics and Materials 197 (September 2012): 686–90. http://dx.doi.org/10.4028/www.scientific.net/amm.197.686.

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Wrinkling is one of the most undesirable effects during forming of thin sheet metal plates. It deforms the surfaces and either hampers further assembly or creates stress concentration regions which may fail during operations. Yoshida wrinkling test is considered as one good tool to analyse the wrinkling properties of sheet metals. Alluminium alloys are most commonly used in aviation industry where wrinkling initiation and its propagation is considered an even serious defect. Present research was therefore focussed on Finite Element simulations of Allumium Alloy-5456-H116 metal sheets specimens

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Liu, Y. P., C. G. Wang, H. F. Tan, and M. K. Wadee. "The interactive bending wrinkling behaviour of inflated beams." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 472, no. 2193 (2016): 20160504. http://dx.doi.org/10.1098/rspa.2016.0504.

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A model is proposed based on a Fourier series method to analyse the interactive bending wrinkling behaviour of inflated beams. The whole wrinkling evolution is tracked and divided into three stages by identifying the bifurcations of the equilibrium path. The critical wrinkling and failure moments of the inflated beam can then be predicted. The global–local interactive buckling pattern is elucidated by the proposed theoretical model and also verified by non-contact experimental tests. The effects of geometric parameters, internal pressure and boundary conditions on the buckling of inflated beam

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Gdoutos, E. E., and M. S. Konsta-Gdoutos. "Load and Geometry Effect on Failure Mode Initiation of Composite Sandwich Beams." Applied Mechanics and Materials 3-4 (August 2006): 173–78. http://dx.doi.org/10.4028/www.scientific.net/amm.3-4.173.

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Facing compressive failure, facing wrinkling and core shear failure are the most commonly encountered failure modes in sandwich beams with facings made of composite materials. The occurrence and sequence of these failure modes depends on the geometrical dimensions, the form of loading and type of support of the beam. In this paper the above three failure modes in sandwich beams with facings made of carbon/epoxy composites and cores made of aluminum honeycomb and two types of foam have been investigated. Two types of beams, the simply supported and the cantilever have been considered. Loading i

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Shi, Yu Qing, and Ai Zhi Guan. "Numerical Simulation in Deep Drawing of Cylindrical Cup with Elliptical Shape Die Shoulder." Advanced Materials Research 148-149 (October 2010): 1355–59. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1355.

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Wrinkling and tearing are the main failure modes in sheet-metal forming. The radius of die is important for deep-drawing because of an effective way to promote deep formability sheet metal .This paper presents an attempt to determine the effect of various elliptical shape die shoulder on the fracture and wrinkling and was investigated using 08Al sheet metal .The ellipse with minor axis of b=4.5mm and major axis of a=6.5mm,a=7mm,a=8mm ,a=10mm were analyzed to eliminate wrinkling and fracture in deep-drawing .The aim of this study is to investigate the effect of elliptical major axis and ellipti

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Hematian, J., and P. M. Wild. "The Effects of Tooling Imperfections on the Initiation of Wrinkling in Finite Element Modeling of a Deep Drawing Process." Journal of Engineering Materials and Technology 123, no. 4 (2000): 442–46. http://dx.doi.org/10.1115/1.1396351.

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A brief review of the literature on wrinkling in deep drawing processes is presented. It is noted that, while there is a large body of literature related to thin sheet, only one study related to thick sheet or plate has been identified. Finite element based models are used to investigate the effect of initial tooling imperfections on the initiation of wrinkling in deep drawing of thick sheet. Two sorts of tooling imperfections, punch displacement and blank tilting, are considered. The simulation results are compared qualitatively to the experimental forming operation. It is confirmed that tool

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Seok, Seonho, HyungDal Park, and Jinseok Kim. "Scotch-tape surface wrinkling based thin-film material properties extraction." Journal of Micromechanics and Microengineering 32, no. 4 (2022): 045002. http://dx.doi.org/10.1088/1361-6439/ac542a.

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Abstract This paper presents a new simple method to measure thin film material properties using scotch-tape surface wrinkling. Thin metal films have been deposited on polymer substrates by e-beam evaporation. After patterned by photolithography and wet etching, long and narrow thin metal layers have been transferred by peel-off onto the scotch tape. The effect of velocity of scotch tape peel-off on the metal film transfer from polymer substrates to the scotch tape has been investigated. After metal transfer, metal film wrinkling patterns have been established on the scotch tape due to mechanic

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Hutchinson, John W. "The role of nonlinear substrate elasticity in the wrinkling of thin films." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 371, no. 1993 (2013): 20120422. http://dx.doi.org/10.1098/rsta.2012.0422.

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The role of substrate nonlinearity in the stability of wrinkling of thin films bonded to compliant substrates is investigated within the initial post-bifurcation range when wrinkling first emerges. A fully nonlinear neo-Hookean bilayer composed of a thin film on a deep substrate is analysed for a wide range of the film–substrate stiffness ratio, from films that are very stiff compared with the substrate to those only slightly stiffer. Substrate pre-stretch prior to film attachment is shown to have a significant effect on the nonlinearity relevant to wrinkling. Two dimensionless parameters are

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Zheng, Kai Lun, Lei Zhu, Denis J. Politis, Jian Guo Lin, and Trevor A. Dean. "An Analytical and Numerical Investigation on Flange Wrinkling Behavior in Warm Forming Process of AA5754 Using Macro-Textured Tool Design." Key Engineering Materials 716 (October 2016): 586–94. http://dx.doi.org/10.4028/www.scientific.net/kem.716.586.

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In this paper, an analytical buckling model is established to predict the flange wrinkling behavior of deep drawn cylindrical cups of aluminium alloy sheet in warm forming conditions using macro-textured blankholders for the first time. A continuum damage mechanism (CDM) based material model was utilized to reflect the visco-plastic feature of material at elevated temperatures. Forming speed and temperature effects were investigated, and texture ratio and draw ratio effects were also discussed. The developed analytical buckling model was validated by finite element simulations. The increase of

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Wang, Xiaofeng, Haoyue Chu, and Qingshan Yang. "Numerical analysis of dynamic properties of wrinkled thin membranes." Engineering Computations 37, no. 8 (2020): 2871–94. http://dx.doi.org/10.1108/ec-10-2018-0459.

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Purpose This paper aims to numerically study the effects of boundary conditions, pre-stress, material constants and thickness on the dynamic performance of a wrinkled thin membrane. Design/methodology/approach Based on the stability theory of plates and shells, the dynamic equations of a wrinkled thin membrane were developed, and they were solved with the Lanczos method Findings The effects of wrinkle-influencing factors on the dynamic performance of a wrinkled membrane are determined by the wrinkling stage. The effects are prominent when wrinkling deformation is evolving, but they are very sm

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Jun, Hye-Ji, Soo-Yeon Lee, Jeung-Hoan Kim, Bong-Jeun An, and Jin-Young Lee. "Anti-wrinkling Effects of Juniperus rigida Sied." Korean Journal of Microbiology and Biotechnology 41, no. 4 (2013): 449–55. http://dx.doi.org/10.4014/kjmb.1307.07004.

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Cales, Lorri, and Robert A. Weber. "Effects of water temperature on skin wrinkling." Journal of Hand Surgery 22, no. 4 (1997): 747–49. http://dx.doi.org/10.1016/s0363-5023(97)80141-4.

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38

Yin, Shui Ping, Ying She Luo, Zheng Cao, Shu Ling Luo, and Wen Bin Liu. "Research on the Effect of Entry Angle and Pressure-Pad Force on Deep-Draw Thermo-Rheological Forming of a TC1 Ti-Alloy Sheet." Key Engineering Materials 353-358 (September 2007): 635–38. http://dx.doi.org/10.4028/www.scientific.net/kem.353-358.635.

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Numerical simulation can be successfully applied to evaluate product manufacturability and predict, while material wrinkling and splitting are associated with entry angle and pressure-pad force during sheet metal stamping process. In this paper, the influence of entry angle and pressure-pad force on deep-drawing thermal forming of TC1 titanium alloy was analyzed by using explicit dynamic finite element software STAMPACK, two kinds of main invalidation, including wrinkling and splitting, and obtained that the entry angle is an important factor for deep-draw thermal forming. By analyzing the for

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Han, J. O., and S. S. Kim. "Effects of Swirl on High-Speed Combustion in a Single-Shot Optical SI Engine." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 206, no. 4 (1992): 237–47. http://dx.doi.org/10.1243/pime_proc_1992_206_184_02.

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Single-shot tests in a single-cylinder, optical SI engine operated by a rapid compression and expansion machine were performed in order to investigate the combined effects of engine speed, ignition position and swirl on early combustion and overall performance. For central ignition, swirl showed consistently favourable effects on combustion-related performance. However, at half-radius ignition the desirable swirl effect persisted at low engine speeds but faded away as the speed increased. This reversing of trends can be partially explained by differences in the maximum cylinder pressure, flame

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Cui, Liu, Sanqiang Shi, Gaosheng Wei, and Xiaoze Du. "Shear deformation-induced anisotropic thermal conductivity of graphene." Physical Chemistry Chemical Physics 20, no. 2 (2018): 951–57. http://dx.doi.org/10.1039/c7cp06415b.

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Fu, Y. Q., S. Sanjabi, Z. H. Barber, et al. "In-Situ Observation of Transition Between Surface Relief and Wrinkling in Thin Film Shape Memory Alloys." Journal of Nanoscience and Nanotechnology 8, no. 5 (2008): 2588–96. http://dx.doi.org/10.1166/jnn.2008.630.

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Significant surface morphology evolution between relief and wrinkling was observed on a 3.5 μm thick TiNiCu film sputter-deposited on a silicon substrate. At room temperature, variation in surface relief morphology (from separated martensite crystals embedded in amorphous matrix to fully inter-weaved martensite plates) was observed with slight change in film composition. The phenomenon was attributed to variations in crystallization temperatures of as-deposited amorphous films during annealing because of the compositional difference. During thermal cycling between room temperature and 100 °C,

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Taheri Kahnamouei, J., and Mohammad Sedighi. "Theoretical, Numerical and Experimental Investigation of the Effects of Manufacturing Process Parameters on Thin-Walled Tube Bending Defects." Advanced Materials Research 83-86 (December 2009): 1107–12. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.1107.

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The aim of this paper is to survey thin-walled tube bending process (without use of mandrel and booster). In tube bending process there are several effective parameters such as wall thickness, outer diameter-to-wall thickness ratio, and centerline bending radius-to-outer diameter ratio. Any mismatch in selecting these parameters would cause defects like wrinkling, variation in wall thickness, and cross section distortion. Firstly, the effects of these parameters on the initiation of the wrinkle, depth of wrinkling, change in wall thickness, and cross section distortion are studied. For this pu

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Shi, Yu Qing. "Improving the Quality in Deep Drawing of Rectangle Parts Using Variable Blank Holder Force." Applied Mechanics and Materials 37-38 (November 2010): 521–24. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.521.

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Wrinkling and tearing are the main failure modes in sheet-metal forming. Wrinkle may occur at the start of a punch stroke if the blank-holder force (BHF) is too low, and tearing may occur at the end of a stroke if the BHF is too high. The BHF is important for deep-drawing because of an effective way to promote deep formability sheet metal. They can be reduced or eliminated by manipulating a suitable BHF during sheet-metal forming. This paper presented an attempt to determine the effect of variable BHF on the tearing and wrinkling and investigated using 08Al sheet metal. The experiment show tha

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Bao, Hongwei, Yuhong Huang, Zhi Yang, et al. "Circular torsion induced fan-blade shaped wrinkling in two-dimensional nano-rings." Physical Chemistry Chemical Physics 19, no. 37 (2017): 25360–68. http://dx.doi.org/10.1039/c7cp04799a.

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Wang, Ziheng, Pardis Rofouie, and Alejandro Rey. "Surface Anchoring Effects on the Formation of Two-Wavelength Surface Patterns in Chiral Liquid Crystals." Crystals 9, no. 4 (2019): 190. http://dx.doi.org/10.3390/cryst9040190.

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We present a theoretical analysis and linear scaling of two-wavelength surface nanostructures formed at the free surface of cholesteric liquid crystals (CLC). An anchoring model based on the capillary shape equation with the high order interaction of anisotropic interfacial tension is derived to elucidate the formation of the surface wrinkling. We showed that the main pattern-formation mechanism is originated due to the interaction between lower and higher order anchoring modes. A general phase diagram of the surface morphologies is presented in a parametric space of anchoring coefficients, an

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Koh, Eun-Jeong, Taeho Kim, Yong-Kyun Ryu, et al. "Enhancement of Skin Anti-Wrinkling Effects of Arthrospira maxima Phycocynobilin by Combining with Wheat Bran Extract." Applied Sciences 14, no. 22 (2024): 10216. http://dx.doi.org/10.3390/app142210216.

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Despite the many beneficial effects of phycocyanobilin (PCB) on human skin, its cosmetic applications have not been extensively investigated owing to its light and temperature sensitivity. This is the first report of PCB extract (SP) derived from marine Arthrospira maxima having skin anti-wrinkling effects associated with antioxidant efficacy and reduction of intracellular reactive oxygen species (ROS) production. We obtained 46.63 ± 1.72 mg PCB/g dry weight of A. maxima in SP through an ethanol extraction process. PCB extracts showed strong effects in increasing collagen synthesis and decreas

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Zhao, Gang Yao, Yu Li Liu, and He Yang. "Numerical Simulation on Influence of Clearance and Friction on Wrinkling in Bending of Aluminum Alloy Rectangular Tubes." Materials Science Forum 546-549 (May 2007): 833–38. http://dx.doi.org/10.4028/www.scientific.net/msf.546-549.833.

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The clearance and friction have large influence on wrinkling in rotary draw bending process of thin-walled rectangular tube. In this paper, a three-dimension Al FEM model of rotary draw bending of thin-walled rectangular tube is built under the ABAQUS/ Explicit environment. Based on the model, simulation and analysis of rotary draw bending for aluminum alloy 3A21 thin-walled rectangular tube have been carried out. The results show that the height of wrinkling wave decreases obviously with the decrease of the clearance between mandrel and tube or with the increase of the friction coefficient be

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Bažant, Zdeněk, and Peter Grassl. "Size Effect of Cohesive Delamination Fracture Triggered by Sandwich Skin Wrinkling." Journal of Applied Mechanics 74, no. 6 (2007): 1134–41. http://dx.doi.org/10.1115/1.2722778.

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Because the observed size effect follows neither the strength theory nor the linear elastic fracture mechanics, the delamination fracture of laminate-foam sandwiches under uniform bending moment is treated by the cohesive crack model. Both two-dimensional geometrically nonlinear finite element analysis and one-dimensional representation of skin (or facesheet) as a beam on elastic-softening foundation are used. The use of the latter is made possible by realizing that the effective elastic foundation stiffness depends on the ratio of the critical wavelength of periodic skin wrinkles to the foam

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SUN, L., Y. ZHAO, W. M. HUANG, H. PURNAWALI, and Y. Q. FU. "WRINKLING ATOP SHAPE MEMORY MATERIALS." Surface Review and Letters 19, no. 02 (2012): 1250010. http://dx.doi.org/10.1142/s0218625x12500102.

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Many surface related properties, such as surface roughness, surface tension and reflection etc are heavily dependent on the surface morphology of materials. Patterned surfaces may have significant effects on these properties. In this paper, we compare wrinkles produced atop three different types of shape memory materials, namely, shape memory alloy, shape memory polymer and shape memory hybrid. We show the advantages and disadvantages of them in terms of the processing techniques and the resultant wrinkle patterns.

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Akhunova A.Kh. and Baimova J. A. "Effect of the Dislocation Dipoles with Different Arms on the Graphene Deformation Behavior: molecular dynamics." Technical Physics 68, no. 4 (2023): 415. http://dx.doi.org/10.21883/tp.2023.04.55930.6-23.

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The molecular dynamics simulation is used to analyze the features of the deformation behavior and the process of fracture of graphene with dislocation dipoles with different arm. Moreover, the wrinkling of graphene during deformation is taken into account, which greatly reduces the strength of graphene. It has been established that an increase in temperature slightly affects the mechanical properties of graphene with dislocation dipoles, in contrast to defect-free graphene and graphene with a Stone--Wales defect. It is shown that a change in the distance between dislocations in a dipole does n

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