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Issue No.02 - March/April (2008 vol.14)
pp: 329-341
This paper provides a formal connexion between springs and continuum mechanics in the context of one-dimensional and two-dimensional elasticity. In a first stage, the equivalence between tensile springs and the finite element discretization of stretching energy on planar curves is established. Furthermore, when considering a quadratic strain function of stretch, we introduce a new type of springs called tensile biquadratic springs. In a second stage, we extend this equivalence to non-linear membranes (St Venant-Kirchhoff materials) on triangular meshes leading to triangular biquadratic and quadratic springs. Those tensile and angular springs produce isotropic deformations parameterized by Young modulus and Poisson ratios on unstructured meshes in an efficient and simple way. For a specific choice of the Poisson ratio, 0.3, we show that regular spring-mass models may be used realistically to simulate a membrane behavior. Finally, the different spring formulations are tested in pure traction and cloth simulation experiments.
Animation, Physically based modeling, Animation
Herv? Delingette, "Triangular Springs for Modeling Nonlinear Membranes", IEEE Transactions on Visualization & Computer Graphics, vol.14, no. 2, pp. 329-341, March/April 2008, doi:10.1109/TVCG.2007.70431
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