Title of article :
Modelling facial expressions: A framework for simulating nonlinear soft tissue deformations using embedded 3D muscles
Author/Authors :
Wu، نويسنده , , Tim and Hung، نويسنده , , Alice P.-L. and Hunter، نويسنده , , Peter and Mithraratne، نويسنده , , Kumar، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
8
From page :
63
To page :
70
Abstract :
Human face can be seen as a soft tissue organ complex with a large investing network of musculature. Due to its complexity, most existing computational models approximate these muscular structures using simple geometries such as 1-D curves or primitive 3-D shapes. This paper presents a new approach to evaluate muscle contribution from anatomically accurate geometries while maintaining the computational complexity at a tractable level. In the proposed method, 3-D muscle structures are embedded inside a facial continuum (encompassing all superficial soft tissue structures), where mechanical contribution of muscles is evaluated independently and transferred to the facial computational domain through a finite element mapping procedure. Muscle forces are decomposed into an array of discrete point loads that are determined at the integration points of an appropriate quadrature scheme. As a result, muscle meshes can be constructed independent from the facial mesh giving two main advantages: (i) the muscle geometries can be refined independent of the facial computational domain, and (ii) it is not required for the computational domain to conform to complex topology of muscle structures.
Keywords :
Facial biomechanics , Nonlinear elasticity , Cubic hermite elements , Mixed finite element method , Embedded muscles
Journal title :
Finite Elements in Analysis and Design
Serial Year :
2013
Journal title :
Finite Elements in Analysis and Design
Record number :
1458625
Link To Document :
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