Lonny L. Thompson

TL;DR: State-of-the-art finite-element methods for time-harmonic acoustics governed by the Helmholtz equation are reviewed and Mesh resolution to control phase error and bound dispersion or pollution errors measured in global norms for large wave numbers in finite- element methods are described.

TL;DR: The selection of the GLS mesh parameter for two dimensions is considered, and leads to elements that exhibit improved phase accuracy, and an optimal GLS parameter is found which reduces phase error for all possible wave vector orientations over elements.

TL;DR: In this paper, a comparative study of the performance of Galerkin/least-squares finite element methods for structural acoustics is presented, showing that they are economically competitive with boundary element methods.

TL;DR: In this article, the exact and exact local radiation boundary conditions (RBC) for the scalar time-dependent wave equation are reformulated as an auxiliary Cauchy problem for each radial harmonic on a spherical boundary.

TL;DR: In this paper, a material model development approach and transient non-linear dynamics simulations of the projectile/armor interactions are employed to explore the role of multi-walled carbon-nanotube (MWCNT) reinforcements in improving the ballistic protection performance of polyvinyl-ester-epoxy matrix (PVEE)/E-glass fiber matrix reinforced laminate armor.