246 citations · 987 across the 26 of their papers we have counts for
11 papers · 1 filter
An electromechanically coupled multiphase-field model with generalized kinetic relations for ferroelectrics
Hsu-Cheng Cheng, Dennis M. Kochmann
Classical phase-field models typically use the Allen--Cahn evolution law to model interface motion as a consequence of energy-gradient descent. This implies a linear kinetic relati…
Global DIC-based sample-detector geometry refinement for accurate EBSD indexing
Claire Griesbach, Dennis M. Kochmann
Electron backscatter diffraction is a powerful tool for mapping crystallographic microstructures. However, the primary crux to improving orientation accuracy and applying the techn…
Ferroelectric polarization mapping through pseudosymmetry-sensitive EBSD reindexing
Claire Griesbach, Tizian Scharsach, Morgan Trassin +1
Ferroelectric materials exhibit a switchable, spontaneous polarization at the unit cell level--an attractive property utilized in many emerging technologies including, among others…
Long-term atomistic finite-temperature substitutional diffusion
Shashank Saxena, Prateek Gupta, Dennis M. Kochmann
Simulating long-term mass diffusion kinetics with atomic precision is important to predict chemical and mechanical properties of alloys over time scales of engineering interest in…
Stiff and Deformable Quasicrystalline Architected Materials
Matheus I. N. Rosa, Konstantinos Karapiperis, Kaoutar Radi +1
Architected materials achieve unique mechanical properties through precisely engineered microstructures that minimize material usage. However, a key challenge of low-density materi…
Atomistic-informed phase field modeling of magnesium twin growth by disconnections
Yang Hu, Dennis M. Kochmann, Brandon Runnels
The nucleation and propagation of disconnections play an essential role during twin growth. Atomistic methods can reveal such small structural features on twin facets and model the…
Finite-temperature grain boundary properties from quasistatic atomistics
Miguel Spínola, Shashank Saxena, Prateek Gupta +2
Grain boundary (GB) properties greatly influence the mechanical, electrical, and thermal response of polycrystalline materials. Most computational studies of GB properties at finit…
Finite-temperature surface elasticity of crystalline solids
Shashank Saxena, Miguel Spinola, Prateek Gupta +1
Surface energies and surface elasticity largely affect the mechanical response of nanostructures as well as the physical phenomenon associated with surfaces such as evaporation and…
A phase-field model for ferroelectrics with general kinetics. Part I: Model formulation
Laurent Guin, Dennis Kochmann
When subjected to electro-mechanical loading, ferroelectrics see their polarization evolve through the nucleation and evolution of domains. Existing mesoscale phase-field models fo…
Strengthening magnesium by design: integrating alloying and dynamic processing
Suhas Eswarappa Prameela, Peng Yi, Yannick Hollenweger +6
Magnesium (Mg) has the lowest density of all structural metals and has excellent potential for wide use in structural applications. While pure Mg has inferior mechanical properties…
Rigorous bounds on the effective moduli of composites and inhomogeneous bodies with negative-stiffness phases
Dennis M. Kochmann, Graeme W. Milton
We review the theoretical bounds on the effective properties of linear elastic inhomogeneous solids (including composite materials) in the presence of constituents having non-posit…