Non-deterministic Calibration of Crystal
Plasticity Model Parameters
Jacob Hochhalter, Geoffrey Bomarito, Saikumar Yeratapally, Patrick Leser,
Tim Ruggles, James Warner, and William Leser
1 Introduction
The use of crystal plasticity (CP) to model grain-scale mechanical behavior of
metallic microstructures has become widely used, especially in the finite element
context. A major motivation has been observations made during experiment regarding the microstructure dependence of crack initiation on microstructural features
and the general understanding that microstructure variation underpins variability
observed at larger length scales. CP models aid in the fundamental understanding
of those observations through their capability to model the effect of microscale
heterogeneity by capturing the orientation-dependent behavior of each grain in
a polycrystalline material. The aggregate effect of each grain, assembled in a
polycrystal model, can then be analyzed upon CP model implementation within
numerical methods for the solution of differential equations with complex geometry
and imposed boundary conditions, e.g., finite element or fast Fourier transform
methods.
J. Hochhalter ()
Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, USA
e-mail: jacob.hochhalter@utah.edu
G. Bomarito · P. Leser · J. Warner · W. Leser
Durability, Damage Tolerance and Reliability Branch, NASA Langley Research Center,
Hampton, VA, USA
e-mail: geoffrey.f.bomarito@nasa.gov; patrick.e.leser@nasa.gov;
james.e.warner@nasa.gov@nasa.gov; william.leser@nasa.gov
S. Yeratapally · T. Ruggles
Durability, Damage Tolerance and Reliability Branch, National Institute of Aerospace, Hampton,
VA, USA
e-mail: saikumarreddy.yeratapally@nasa.gov; timothy.ruggles@nasa.gov
© Springer Nature Switzerland AG 2020
S. Ghosh et al. (eds.), Integrated Computational Materials Engineering (ICME),
https://doi.org/10.1007/978-3-030-40562-5_6
165
Plasticity Model Parameters
Jacob Hochhalter, Geoffrey Bomarito, Saikumar Yeratapally, Patrick Leser,
Tim Ruggles, James Warner, and William Leser
1 Introduction
The use of crystal plasticity (CP) to model grain-scale mechanical behavior of
metallic microstructures has become widely used, especially in the finite element
context. A major motivation has been observations made during experiment regarding the microstructure dependence of crack initiation on microstructural features
and the general understanding that microstructure variation underpins variability
observed at larger length scales. CP models aid in the fundamental understanding
of those observations through their capability to model the effect of microscale
heterogeneity by capturing the orientation-dependent behavior of each grain in
a polycrystalline material. The aggregate effect of each grain, assembled in a
polycrystal model, can then be analyzed upon CP model implementation within
numerical methods for the solution of differential equations with complex geometry
and imposed boundary conditions, e.g., finite element or fast Fourier transform
methods.
J. Hochhalter ()
Department of Mechanical Engineering, University of Utah, Salt Lake City, UT, USA
e-mail: jacob.hochhalter@utah.edu
G. Bomarito · P. Leser · J. Warner · W. Leser
Durability, Damage Tolerance and Reliability Branch, NASA Langley Research Center,
Hampton, VA, USA
e-mail: geoffrey.f.bomarito@nasa.gov; patrick.e.leser@nasa.gov;
james.e.warner@nasa.gov@nasa.gov; william.leser@nasa.gov
S. Yeratapally · T. Ruggles
Durability, Damage Tolerance and Reliability Branch, National Institute of Aerospace, Hampton,
VA, USA
e-mail: saikumarreddy.yeratapally@nasa.gov; timothy.ruggles@nasa.gov
© Springer Nature Switzerland AG 2020
S. Ghosh et al. (eds.), Integrated Computational Materials Engineering (ICME),
https://doi.org/10.1007/978-3-030-40562-5_6
165