Stephen Langer

Publications

Spatial strain correlations, machine learning, and deformation history in crystal plasticity

May 16, 2019

Author(s)

Andrew C. Reid, Stefanos Papanikolaou, Hengxu Song, Erik Van der Giessen, Stephen A. Langer, Michail Tzimas

Digital image correlation (DIC) is a well-established, non-invasive technique for tracking and quantifying the deformation of mechanical samples under test

Morphology Dependent of Flow Stress of Nickel-Based Superalloys in the Multi-Scale Crystal Plasticity Framework

November 2, 2017

Author(s)

Shahriyar Keshavarzhadad, Zara Molaeinia, Andrew C. Reid, Stephen A. Langer

This paper develops a framework to obtain flow stress of Nickel-based superalloys as a function of gamma-gamma prime morphology. In general, the two-phase gamma

A Non-Schmid Crystal Plasticity Finite Element Approach To Multi-Scale Modeling Of Nickel-Based Superalloys

August 1, 2016

Author(s)

Shahriyar Keshavarzhadad, S K. Ghosh, Andrew C. Reid, Stephen A. Langer

This paper develops non-Schmid crystal-plastic constitutive models at two length scales, & bridges these length scales in a multi-scale framework. The

gtklogger: A Tool For Systematically Testing Graphical User Interfaces

August 20, 2015

Author(s)

Stephen A. Langer, Faical Y. Congo, Andrew C. Reid, Rhonald Lua, Valerie R. Coffman

We describe a scheme for systematically testing the operation of a graphical user interface. The scheme provides a capability for generating event logs, which

Grain-scale thermoelastic stresses and spatiotemporal temperature gradients on airless bodies, implications for rock breakdown.

February 25, 2015

Author(s)

Stephen A. Langer

Thermomechanical processes such as fatigue and shock have been suggested to cause and contribute to rock breakdown on Earth, and on other planetary bodies

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Stephen Langer (Fed)

Current Research:

Publications

Spatial strain correlations, machine learning, and deformation history in crystal plasticity

Morphology Dependent of Flow Stress of Nickel-Based Superalloys in the Multi-Scale Crystal Plasticity Framework

A Non-Schmid Crystal Plasticity Finite Element Approach To Multi-Scale Modeling Of Nickel-Based Superalloys

gtklogger: A Tool For Systematically Testing Graphical User Interfaces

Grain-scale thermoelastic stresses and spatiotemporal temperature gradients on airless bodies, implications for rock breakdown.