Modelling anisotropic viscoelasticity for real-time soft tissue simulation.
Modelling anisotropic viscoelasticity for real-time soft tissue simulation.
复制标题
建模各向异性粘弹性以进行实时软组织模拟。
DOI：
10.1007/978-3-540-85988-8_84
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Taylor ZA
中科院分区：
文献类型：
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作者：
Taylor ZA
以前几乎所有基于生物力学的时间临界外科模拟都忽略了组织力学响应的各向异性和时间依赖性。我们通过提出各向异性粘-超弹性本构模型的有效求解程序来解决这个问题，该模型允许在非线性显式动力有限元算法中使用这些模型。我们表明，与通常的各向同性弹性模型相比，该过程允许将各向异性和粘弹性结合起来，成本仅为5.1%。当与高性能GPU执行相结合时，完整的框架适用于时间紧迫的仿真应用，如交互式手术仿真和术中图像配准。
Previously almost all biomechanically-based time-critical surgical simulation has ignored the well established features of tissue mechanical response of anisotropy and time-dependence. We address this issue by presenting an efficient solution procedure for anisotropic visco-hyperelastic constitutive models which allows use of these in nonlinear explicit dynamic finite element algorithms. We show that the procedure allows incorporation of both anisotropy and viscoelasticity for as little as 5.1% additional cost compared with the usual isotropic elastic models. When combined with high performance GPU execution the complete framework is suitable for time-critical simulation applications such as interactive surgical simulation and intraoperative image registration.