Material and spatial incremental constitutive equations
The question Instantaneous moduli for PK-2 stress and Green strain Instantaneous moduli for Kirchhoff stress The reason for the inconsistency The question A colleague asked a question on objectivity a...
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The ARENA model for partially saturated soils
Introduction Some predictions from ARENA Remarks Introduction I developed the ARENA model for partially saturated soils last year (2016). Before that we had tried using a typical Drucker-Prager with...
View ArticleThe difference between the spin and angular velocity tensors
Introduction The spin tensor The Green-Naghdi objective rate Relation between spin and angular velocity Remarks Introduction Several years ago I took created a Wikpedia article on objective stress...
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Can the Larsen-C ice shelf failure be predicted with Peridynamics?
Introduction Issues to be resolved before a simulation Remarks Introduction On July 7, 2017, the Project Midas group released a couple of plots of material velocities and interferograms showing the...
View ArticleParallel domain decomposition for particle methods: Part 1
Introduction Creating and scattering particles MPI implementation MPI setup The scatter operation Remarks Introduction For parallel particle codes that have to be written quickly (while retaining...
View ArticleParallel domain decomposition for particle methods: Part 2
Introduction Exchanging particles between processes MPI implementation PatchNeighborComm struct Patch struct The particle exchange function Remarks Introduction The previous article in this series...
View ArticleParallel domain decomposition for particle methods: Part 3
Introduction Plimpton’s scheme for exchanging particles MPI implementation Patch struct The particle exchange function Remarks Introduction In Part 2 of this series we showed the direct way of...
View ArticleParallel domain decomposition for particle methods: Part 4
Introduction Plimpton’s scheme for migrating particles MPI implementation Patch struct Remarks Introduction The Plimpton scheme of communicating ghost information between patches was described in Part...
View ArticleUnit testing with MPI, googletest, and cmake
Introduction Installing googletest Making sure cmake finds and compiles googletest Adding local unit tests The CMakeLists.txt file in UnitTests The actual test C++ code The MPI test environment class...
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Plotting ellipsoids with R
Introduction The rgl package Drawing ellipsoids with cda Euler angles using orientlib The image produced by cda Euler angles and direction cosines Plotting ellipsoids with rgl.ellipsoid Plotting...
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