“…Significant efforts [Alsawaf, 1985;Zhang et al, 2005;King et al, 2005;Yeomana et al, 2010] have been devoted to finding numerical solutions to specific structures, but these approaches are insufficient for developing a general model for the wide range of real cloth materials. Our elastic model is closely related to generic and data-driven models in textile engineering.…”
a) Gray Interlock (b) Pink Ribbon Brown (c) Navy Sparkle Sweat (d) 11oz Black Denim (e) White Dots on Black Figure 1: When worn by the same mannequin model, shirts made of different cloth materials exhibit distinctive patterns of wrinkles and folds in our simulation. For example, the Gray Interlock shirt has many small wrinkles since it is compliant in stretching and bending, while the shirt made of the stiffer Pink Ribbon Brown material tends to form a few larger wrinkles.
AbstractCloth often has complicated nonlinear, anisotropic elastic behavior due to its woven pattern and fiber properties. However, most current cloth simulation techniques simply use linear and isotropic elastic models with manually selected stiffness parameters. Such simple simulations do not allow differentiating the behavior of distinct cloth materials such as silk or denim, and they cannot model most materials with fidelity to their real-world counterparts. In this paper, we present a data-driven technique to more realistically animate cloth. We propose a piecewise linear elastic model that is a good approximation to nonlinear, anisotropic stretching and bending behaviors of various materials. We develop new measurement techniques for studying the elastic deformations for both stretching and bending in real cloth samples. Our setup is easy and inexpensive to construct, and the parameters of our model can be fit to observed data with a well-posed optimization procedure. We have measured a database of ten different cloth materials, each of which exhibits distinctive elastic behaviors. These measurements can be used in most cloth simulation systems to create natural and realistic clothing wrinkles and shapes, for a range of different materials.
“…Significant efforts [Alsawaf, 1985;Zhang et al, 2005;King et al, 2005;Yeomana et al, 2010] have been devoted to finding numerical solutions to specific structures, but these approaches are insufficient for developing a general model for the wide range of real cloth materials. Our elastic model is closely related to generic and data-driven models in textile engineering.…”
a) Gray Interlock (b) Pink Ribbon Brown (c) Navy Sparkle Sweat (d) 11oz Black Denim (e) White Dots on Black Figure 1: When worn by the same mannequin model, shirts made of different cloth materials exhibit distinctive patterns of wrinkles and folds in our simulation. For example, the Gray Interlock shirt has many small wrinkles since it is compliant in stretching and bending, while the shirt made of the stiffer Pink Ribbon Brown material tends to form a few larger wrinkles.
AbstractCloth often has complicated nonlinear, anisotropic elastic behavior due to its woven pattern and fiber properties. However, most current cloth simulation techniques simply use linear and isotropic elastic models with manually selected stiffness parameters. Such simple simulations do not allow differentiating the behavior of distinct cloth materials such as silk or denim, and they cannot model most materials with fidelity to their real-world counterparts. In this paper, we present a data-driven technique to more realistically animate cloth. We propose a piecewise linear elastic model that is a good approximation to nonlinear, anisotropic stretching and bending behaviors of various materials. We develop new measurement techniques for studying the elastic deformations for both stretching and bending in real cloth samples. Our setup is easy and inexpensive to construct, and the parameters of our model can be fit to observed data with a well-posed optimization procedure. We have measured a database of ten different cloth materials, each of which exhibits distinctive elastic behaviors. These measurements can be used in most cloth simulation systems to create natural and realistic clothing wrinkles and shapes, for a range of different materials.
The parachute inflation process involves fluid–structure interaction problems posing several mathematical and engineering challenges, e.g. accurate aerodynamics calculations for bluff-body geometries involving with moving boundary, appropriate structural models in predicting the behavior of canopy, and realization of the coupling between the fluid and structure. These challenges attract the attention of scholars worldwide, and considerable achievements have been obtained in applying numerical methods and simulations to design multifarious parachutes. In this paper, the authors highlight the advances in the following fields: the methods suitable for time-dependent flow around bluff-body geometries, the accurate structural models in consideration of the under-constrained and no-compression nature of the canopy, and the advantages and disadvantages of different coupling algorithms in terms of numerical stability and computational economics. Moreover, in order to simulate the parachute inflation more realistically, we focus on accurate representation of three physical phenomena, as follows: an appropriate model of the flow through porous media, an accurate treatment of the wrinkling phenomenon of the canopy, and a consistent representation of the impact-contact problem associated with the inflation process. Finally, based on a review of existing literature, we offer recommendations for future research on the application of numerical methods for simulating the inflation process.
“…In comparison with polygonal section, similar-oval section possesses unique stability and resistance ability to buckling [2]. Establish the tree-dimensional frictional contact model of the Jib using the polygonal and the similar-oval cross section separately by using the powerful nonlinear analysis software ABAQUS [3]. Analyze the operating mode in which sliders' stress was the worst,as shown in Fig.…”
The existence of boundary condition and friction are difficult to predict which makes the sliders contact situation extremely complex. The actual response of the contact region becomes a tough research by using traditional method. Taking the cylinder supporting function into account, the polygonal and similar-oval Jib models are established. Research of the stress distribution and the stress concentration phenomenon is analyzed. The results indicate that stress distribution of the sliders of the similar-oval Jib is more uniform in comparison with the polygonal Jib that it can ameliorate the stress state of the contact region and enhance the partial stability of the Jib.
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