Real‐time Biomechanically‐based Muscle Volume Deformation using FEM

Zhu, Qing-Hong; Chen, Yan; Kaufman, Arie

doi:10.1111/1467-8659.00274

Cited by 55 publications

(26 citation statements)

References 14 publications

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“…Although elastic solids can be modeled with an Eulerian formulation [Goktekin et al 2004;Levin et al 2011], typically they are modeled with Lagrangian formulations [Gourret et al 1989;Chen and Zeltzer 1992;Bro-Nielsen and Cotin 1996;Zhu et al 1998;O'Brien and Hodgins 1999]. Linear corotated tetrahedral finite elements [Belytschko and Glaum 1979;Nour-Omid and Rankin 1991;Müller et al 2002;Etzmuss et al 2003;Irving et al 2004;Parker and O'Brien 2009] have been used widely in computer graphics, and we use them in this work with extensions to enforce incompressibility where needed ].…”

Section: Related Workmentioning

confidence: 99%

Simulating liquids and solid-liquid interactions with lagrangian meshes

et al. 2013

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This paper describes a Lagrangian finite element method that simulates the behavior of liquids and solids in a unified framework. Local mesh improvement operations maintain a high-quality tetrahedral discretization even as the mesh is advected by fluid flow. We conserve volume and momentum, locally and globally, by assigning each element an independent rest volume and adjusting it to correct for deviations during remeshing and collisions. Incompressibility is enforced with per-node pressure values, and extra degrees of freedom are selectively inserted to prevent pressure locking. Topological changes in the domain are explicitly treated with local mesh splitting and merging. Our method models surface tension with an implicit formulation based on surface energies computed on the boundary of the volume mesh.With this method we can model elastic, plastic, and liquid materials in a single mesh, with no need for explicit coupling. We also model heat diffusion and thermoelastic effects, which allow us to simulate phase changes. We demonstrate these capabilities in several fluid simulations at scales from millimeters to meters, including simulations of melting caused by external or thermoelastic heating.

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Section: Related Workmentioning

confidence: 99%

Simulating liquids and solid-liquid interactions with lagrangian meshes

et al. 2013

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“…Ng- ThowHing [2001] and Teran et al [2003; developed volumetric muscle models to simulate muscles with both active and passive components. Zhu et al [1998] use a linear elastic muscle model along with finite elements for muscle volume deformation. Maural et al [1996] and Aubel and Thalmann [2001] constructed musclebased virtual human characters.…”

Section: Muscle Simulationmentioning

confidence: 99%

Musculotendon simulation for hand animation

Sueda¹,

Kaufman²,

Pai³

2008

ACM SIGGRAPH 2008 Papers

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Figure 1: Pipeline: The user specifies the model and its corresponding animation. Our system computes the required activations, and simulates the muscles, tendons, and bones. The skin is then attached to the skeleton, and the subcutaneous deformation from tendon motion is added as a post-process. AbstractWe describe an automatic technique for generating the motion of tendons and muscles under the skin of a traditionally animated character. This is achieved by integrating the traditional animation pipeline with a novel biomechanical simulator capable of dynamic simulation with complex routing constraints on muscles and tendons. We also describe an algorithm for computing the activation levels of muscles required to track the input animation. We demonstrate the results with several animations of the human hand.

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“…Finite element simulations have been used to model a hand grasping a ball [15], to simulate muscles [16], for virtual surgery [17], and to simulate data from the NIH visible human data set [18,19]. OÕBrien and Hodgins [20] and OÕBrien et al [21] simulated brittle and ductile fracture, respectively, while Yngve et al [22] coupled this work to explosions.…”

Section: Related Workmentioning

confidence: 99%

Tetrahedral and hexahedral invertible finite elements

2006

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We review an algorithm for the finite element simulation of elastoplastic solids which is capable of robustly and efficiently handling arbitrarily large deformation. In fact, the model remains valid even when large parts of the mesh are inverted. The algorithm is straightforward to implement and can be used with any material constitutive model, and for both volumetric solids and thin shells such as cloth. We also discuss a mechanism for controlling plastic deformation, which allows a deformable object to be guided towards a desired final shape without sacrificing realistic behavior, and an improved method for rigid body collision handling in the context of mixed explicit/implicit time-stepping. Finally, we present a novel extension of our method to arbitrary element types including specific details for hexahedral elements.

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Real‐time Biomechanically‐based Muscle Volume Deformation using FEM

Cited by 55 publications

References 14 publications

Simulating liquids and solid-liquid interactions with lagrangian meshes

Simulating liquids and solid-liquid interactions with lagrangian meshes

Musculotendon simulation for hand animation

Tetrahedral and hexahedral invertible finite elements

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