Open Access
EDITORIAL
Loc Vu-Quoc1 and Shaofan Li2
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1075-1075, 2021, DOI:10.32604/cmes.2021.018780
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract This article has no abstract. More >
Open Access
EDITORIAL
Mark Austin, Thomas J.R. Hughes, Pamela Eibeck, Darryll Pines, Alice Agogino, J. Tinsley Oden, Lola Martin-Atilano, Billie Greene, Stein Sture, Constance Lütolf-Carroll, Ekkehard Ramm, Paula Hawthorn, Barbara Simons, Antoinette Torres, Carlos Felippa, Brant Smith, Peter Pinsky, Gary May, Sheila Humphreys, Loc Vu-Quoc
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1077-1122, 2021, DOI:10.32604/cmes.2021.018838
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract This article has no abstract. More >
Open Access
EDITORIAL
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1123-1123, 2021, DOI:10.32604/cmes.2021.019387
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract
More >
Open Access
ARTICLE
S. Morganti1, F. Fahrendorf2, L. De Lorenzis3, J. A. Evans4, T. J. R. Hughes5,* and A. Reali6
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1125-1150, 2021, DOI:10.32604/cmes.2021.016832
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract We investigate primal and mixed u−p isogeometric collocation methods for application to nearly-incompressible
isotropic elasticity. The primal method employs Navier’s equations in terms of the displacement unknowns, and the
mixed method employs both displacement and pressure unknowns. As benchmarks for what might be considered
acceptable accuracy, we employ constant-pressure Abaqus finite elements that are widely used in engineering applications. As a basis of comparisons, we present results for compressible elasticity. All the methods were completely
satisfactory for the compressible case. However, results for low-degree primal methods exhibited displacement
locking and in general deteriorated in the nearly-incompressible case. The results for… More >
Open Access
ARTICLE
Mertcan Cihan, BlaŽ Hudobivnik, Fadi Aldakheel, Peter Wriggers*
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1151-1180, 2021, DOI:10.32604/cmes.2021.016851
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract The virtual element method (VEM) can be seen as an extension of the classical finite element method (FEM)
based on Galerkin projection. It allows meshes with highly irregular shaped elements, including concave shapes.
So far the virtual element method has been applied to various engineering problems such as elasto-plasticity,
multiphysics, damage and fracture mechanics. This work focuses on the extension of the virtual element method to
efficient modeling of nonlinear elasto-dynamics undergoing large deformations. Within this framework, we employ
low-order ansatz functions in two and three dimensions for elements that can have arbitrary polygonal shape.
The formulations considered in this… More >
Open Access
ARTICLE
Hiroki Akehashi, Izuru Takewaki*
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1181-1207, 2021, DOI:10.32604/cmes.2021.017204
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract A new method of robust damper design is presented for elastic-plastic multi-degree-of-freedom (MDOF) building
structures under multi-level ground motions (GMs). This method realizes a design that is effective for various
levels of GMs. The robustness of a design is measured by an incremental dynamic analysis (IDA) curve and an ideal
drift response curve (IDRC). The IDRC is a plot of the optimized maximum deformation under a constraint on the
total damper quantity vs. the design level of the GMs. The total damper quantity corresponds to the total cost of
the added dampers. First, a problem of generation of IDRCs is… More >
Open Access
ARTICLE
Carlos A. Felippa*
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1209-1241, 2021, DOI:10.32604/cmes.2021.016803
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract This paper considers Lagrangian finite elements for structural dynamics constructed with cubic displacement
shape functions. The method of templates is used to investigate the construction of accurate mass-stiffness pairs.
This method introduces free parameters that can be adjusted to customize elements according to accuracy and
rank-sufficiency criteria. One- and two-dimensional Lagrangian cubic elements with only translational degrees of
freedom (DOF) carry two additional nodes on each side, herein called side nodes or SN. Although usually placed
at the third-points, the SN location may be adjusted within geometric limits. The adjustment effect is studied in
detail using symbolic computations for a… More >
Open Access
ARTICLE
Magdalini Ntetsika, Panayiotis Papadopoulos*
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1243-1258, 2021, DOI:10.32604/cmes.2021.017404
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract A new and computationally efficient version of the immersed boundary method, which is combined with the
coarse-graining method, is introduced for modeling inextensible filaments immersed in low-Reynolds number
flows. This is used to represent actin biopolymers, which are constituent elements of the cytoskeleton, a complex network-like structure that plays a fundamental role in shape morphology. An extension of the traditional
immersed boundary method to include a stochastic stress tensor is also proposed in order to model the thermal
fluctuations in the fluid at smaller scales. By way of validation, the response of a single, massless, inextensible
semiflexible filament immersed in… More >
Open Access
ARTICLE
Simon Martinez1, Jürgen Lenz1, Hans Schindler1,2, Willi Wendler1, Stefan Rues3, Karl Schweizerhof1,*, Sophia Terebesi2, Nikolaos Nikitas Giannakopoulos2, Marc Schmitter2
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1259-1281, 2021, DOI:10.32604/cmes.2021.017422
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract The occlusal design plays a decisive role in the fabrication of dental restorations. Dentists and dental technicians
depend on mechanical simulations of mandibular movement that are as accurate as possible, in particular, to
produce interference-free yet chewing-efficient dental restorations. For this, kinetic data must be available, i.e.,
movements and deformations under the influence of forces and stresses. In the present study, so-called functional
data were collected from healthy volunteers to provide consistent information for proper kinetics. For the latter
purpose, biting and chewing forces, electrical muscle activity and jaw movements were registered synchronously,
and individual magnetic resonance tomograms (MRI) were… More >
Open Access
ARTICLE
Arash Mehraban1, Henry Tufo1, Stein Sture2, Richard Regueiro2,*
CMES-Computer Modeling in Engineering & Sciences, Vol.129, No.3, pp. 1283-1303, 2021, DOI:10.32604/cmes.2021.017476
（This article belongs to this Special Issue: Advances in Computational Mechanics and Optimization
To celebrate the 95th birthday of Professor Karl Stark Pister)
Abstract Higher-order displacement-based finite element methods are useful for simulating bending problems and potentially addressing mesh-locking associated with nearly-incompressible elasticity, yet are computationally expensive.
To address the computational expense, the paper presents a matrix-free, displacement-based, higher-order, hexahedral finite element implementation of compressible and nearly-compressible (ν → 0.5) linear isotropic elasticity
at small strain with p-multigrid preconditioning. The cost, solve time, and scalability of the implementation with
respect to strain energy error are investigated for polynomial order p = 1, 2, 3, 4 for compressible elasticity, and p =
2, 3, 4 for nearly-incompressible elasticity, on different number of CPU cores for… More >
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