Group Members

 

Postdoctoral Researchers

 

Chandra Prakash

Research interest

Multiscale modeling of materials under extreme loading condition, Phase-Field Method.

Current Project: Multiscale modeling and design of protective hybrid composite systems for Aerospace structures.​

Past Education Details:
Ph.D., School of Aeronautics and Astronautics, Purdue University, USA, 2014-2018
M.Tech., Mechanical Engineering, Indian Institute of Technology, Kanpur, India, 2012-2014
B.Tech., Mechanical Engineering, National Institute of Technology, Raipur, India, 2007-2011

Shravan Kotha

Education:
  • PhD, Civil Engineering, Johns Hopkins University, 2014-2020
  • MSE, Mechanical Engineering, Johns Hopkins University, 2019
  • MTech, Civil Engineering, Indian Institute of Technology Bombay, 2010-2012
  • BE, Civil Engineering, Osmania University, 2006-2010
Current Project Title:

Developing a Coupled Elasto-Plastic-Damage Model for Polycrystalline Titanium Alloys from Coupled Crystal Plasticity – Phase Field Simulations

Journal Articles:

  • Ozturk, D., Kotha, S. and S. Ghosh (2021), An uncertainty quantification framework for multiscale parametrically homogenized constitutive models (PHCMs) of polycrystalline Ti alloys, Journal of the Mechanics and Physics of Solids, 148, pp.1-31.
  • Kotha, S., D.Ozturk, B. Smarslok and S.Ghosh (2020), Uncertainty Quantified Parametrically Homogenized Constitutive Models for Microstructure-Integrated Structural Simulations, Integrating Materials and Manufacturing Innovation, pp.1-17.
  • Kotha, S., D.Ozturk, and S.Ghosh (2020), Uncertainty quantified Parametrically Homogenized Constitutive Models for Dual-phase Titanium Alloys, NPJ computational materials., 6(1),pp.1-20.
  • Kotha, S., D. Ozturk, and S. Ghosh (2019a). Parametrically homogenized constitutive models (PHCMs) from micromechanical crystal plasticity FE simulations, part I: Sensitivity analysis and parameter identification for Titanium alloys. International Journal of Plasticity, 120, pp. 296-319.
  • Kotha, S., D. Ozturk, and S. Ghosh (2019b). Parametrically homogenized constitutive models (PHCMs) from micromechanical crystal plasticity FE simulations: Part II: Thermo-elasto-plastic model with experimental validation for titanium alloys. International Journal of Plasticity, 120, pp. 320-339.
  • Ozturk, D., Kotha, S., A. Pilchak, and S. Ghosh (2019). Two-way multi-scaling for predicting fatigue crack nucleation in titanium alloys using parametrically homogenized constitutive models. Journal of the Mechanics and Physics of Solids, 128, pp. 181-207.
  • Ozturk, D., S. Kotha, A. Pilchak, and S. Ghosh (2019). Parametrically Homogenized Constitutive Models for Multi-scale Predictions of Fatigue Crack Nucleation in Titanium Alloys. JOM The Journal of the Minerals, Metals & Materials Society, 71(8), pp. 2657–2670.

Conferences Talks:

  • Kotha, S., D. Ozturk, and S. Ghosh. Parametrically Homogenized Constitutive Models (PHCMs) for Titanium Alloys, SES 2020: Virtual Conference of the Society of Engineering Science, September 29 – October 1, 2020.
  • Kotha, S., D. Ozturk, A.L. Pilchak, S. Ghosh, A Multi-scale Model for Fatigue Crack Initiation in Polycrystalline Titanium Alloys, TMS 2019: 148th Annual Meeting and Exhibition, San Antonio, TX, March 10-14, 2019.
  • Kotha, S., D. Ozturk and S. Ghosh, Probabilistic homogenization of crystal plasticity and fatigue crack nucleation models, EMI 2017: Engineering Mechanics Institute Conference, San Diego, CA, June 4-7, 2017.
  • S. Ghosh, S. Kotha and D. Ozturk, Probabilistic homogenization of crystal plasticity modeling for Ti alloys, TMS 2016: 144th Annual Meeting Exhibition, Nashville, TN, February 14-18, 2016.

Xiaofan Zhang

Education:
  • PhD, Civil Engineering, Johns Hopkins University, United States.
  • MS. Civil Engineering, Northwestern University, Illinois, United States.
  • BS. Civil Engineering,  University of Macau, Macau, China.
Area of work

Developing Parametrically Homogenized Continuum Damage Mechanics (PHCDM) Model for Composite materials. This PHCDM model accounts for the microscopic morphology and evolution of composite materials during the analysis of macroscopic deformation and damage. Meanwhile, the multi-scale damage model is much more computationally efficient than the conventional FE2 methods, enabling us to understand material failure behaviors across multiple length scales with affordable computation resource.

Publications
  1. X. Zhang, D. O’Brien and S. Ghosh “Parametrically homogenized continuum damage mechanics (PHCDM) models for composites from micromechanical analysis”, Computer Methods in Applied Mechanics and Engineering, https://doi.org/10.1016/j.cma.2018.12.005
Talks
  1. X. Zhang,  D. O’Brien and S. Ghosh. “Parametric Homogenization Based Continuum Damage Mechanics Model for Composites.”  Mach Conference. Annapolis, MD. April, 2018.
  2. X. Zhang, Z. Li, D. O’Brien and S. Ghosh. “Multi-scale Damage Modeling of Composites: Parametric Homogenization Based Continuum Damage Mechanics.” American Society for Composites 31th Technical Conference. Williamsburg, Virginia. September, 2016

Graduate Students

 

Max Pinz

Area of work:

Integrated Image-Based Multi-Scale Modeling of Yield, Creep, and Fatigue in Nickel-Based Superalloys

My current research is focused on the development and integration of statistical characterization of nickel-based superalloys. Recently we have developed a method of generating statistically equivalent virtual microstructures, and establishing domains for which the microstructural and property response volumes converge. My current focus is in developing a probabilistic crack nucleation model as a function of material state variables.

Education:
  • B. S., Applied Mathematics and Statistics, Johns Hopkins University, 2014
  • B. S., Chemical and Biomolecular Engineering, Johns Hopkins University, 2014
  • M. S., Chemical and Biomolecular Engineering, Johns Hopkins University, 2015
Publications
  • Pinz, M., Weber, G., Lenthe, W. C., Uchic, M. D., Pollock, T. M., & Ghosh, S. (2018). Microstructure and property based statistically equivalent RVEs for intragranular γ− γ’microstructures of Ni-based superalloys. Acta Materialia, 157, 245-258.
  • Kubair, D. V., Pinz, M., Kollins, K., Przybyla, C., & Ghosh, S. (2018). Role of exterior statistics-based boundary conditions for property-based statistically equivalent representative volume elements of polydispersed elastic composites. Journal of Composite Materials, 0021998318758498.
Talks
  • M, Pinz, G.Weber, S.Ghosh, An Integrated Microstructure Development and Crystal Plasticity Approach with Uncertainty Quantification for Multi-scale Constitutive Model Development, TMS 2017, San Diego Ca, February 2017

Jinlei Shen

Area of work:
Multi-Scale Modeling of Deformation and Crack nucleation in Ti-64 Alloy under Cyclic loading
  • Develop image-based crystal plasticity model of Ti64 for micro-mechanical analysis.
  • Calibrate and validate CPFEM microscopic crack nucleation model from experimental data
  • Parametrically Homogenized Continuum Plasticity Model(PHCM) for Ti64 is calibrated through CPFEM simulations and validated with experimental data.
  • Develop Wavelet transformation-based multi-time scale (WATMUS) for both CPFEM and PHCM to accelerate the simulation of Ti64 under cyclic loading
Education:
  • Ph.D., Civil Engineering, Johns Hopkins University, 2015-present
  • M. S., Civil Engineering, Hefei University of Technology, 2014
  • B. S., Civil Engineering ,Hefei University of Technology, 2011
Publications
  • Cheng, J., Shen, J., Mishra, R. K., & Ghosh, S. (2018). Discrete twin evolution in Mg alloys using a novel crystal plasticity finite element model. Acta Materialia149, 142-153.
  • Tu, X., Shahba, A., Shen, J., & Ghosh, S. (2018). Microstructure and property based statistically equivalent RVEs for polycrystalline-polyphase aluminum alloys. International Journal of Plasticity.

Yanrong Xiao

Education:
  • Ph.D. of Civil Engineering, Aug.2017 – present, Johns Hopkins University,
  • Master of Engineering in Civil Engineering, Sep 2014 – Jun 2017, Harbin Institute of TechnologyHarbin, P.R.China
  • Bachelor of Engineering in Civil Engineering, Aug 2010 – Jun 2014, Harbin Institute of TechnologyHarbin, P.R.China
Area of work

I am interested in multiscale damage modeling of composites material. Now I am working on the parametrically homogenized continuum damage mechanics (PHCDM) model for woven composites materials. We use the PHCDM model to predict damage behavior across various composites material length scales. The three-dimension representative volume element RVE of woven composites is used to predict the micro mechanical properties. The effective material properties of woven composites are studied using the numerical homogenization techniques to get the micro-macro equivalence embedded in PHCDM model.

 

Saikat Dan

Area of work:

I am currently working on multiphysics problems. My work essentially encompasses coupled mechanical and electromagnetic systems used in antenna and sensor applications. Specifically, I am in the process of developing material models for piezoelectric sensors to be used in the quantification of material damage in mechanical systems. I work with and develop finite element programs for solving coupled electromagnetics (Maxwell’s Equations of Electromagnetics) and mechanics (Equations of Mechanical Equilibrium) in a finite deformation paradigm. This facilitates in solving more complex mechanical systems involving sensing of mechanical damage from evolving electromagnetic fields.

Education:
  • PhD, Civil Engineering, Johns Hopkins University, United States.
  • M.Tech, Department of Civil Engineering, Indian Institute of Technology, Kharagpur (2015)
  • B.Tech, Department of Civil Engineering, Indian Institute of Technology, Kharagpur (2015)

Journal Articles:

Conference Talks:

  • S. Dan, P. Tarafder and S. Ghosh, “A Computational Damage Sensor using Electromechanically Coupled Piezoelectric Materials”, 15th US National Congress on Computational Mechanics, Austin, Texas, July 28 – August 1, 2019

Preetam Tarafder

Area of work:

My work is focused on computational modelling of multifunctional materials, in which the material behavior is governed by more than one governing equations and follows a coupled constitutive law. Currently, I am working on developing an efficient finite element model for piezoelectric materials in finite deformation framework by establishing a two-way coupling between mechanical and transient electric fields.

Education:
  • PhD, Civil Engineering, Johns Hopkins University, United States.
  • M.Tech., Structural Engineering, Indian Institute of Technology Kharagpur, 2017
  • B.Tech., Civil Engineering, Indian Institute of Technology Kharagpur, 2017

Journal Articles:

Maloth Thirupathi

Area of work:
My work focuses on uncertainty quantification in parametrically homogenized elasto-plastic constitutive models (PHCM) built from homogenization of microscale CPFEM simulations of poly-crystalline metals.
Education:
  • 2011-2015 B.Tech, Aerospace Engineering, Indian Institute of Technology Bombay, Mumbai, India
  • 2015-2017 MS, Mechanical Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
  • 2017 – PhD, Civil Engineering, Johns Hopkins University

Journal Articles:

Arunjyoti Sinha Roy

Area of work: 

Modeling of Polymer Nano-composites for Molecular Dynamics simulation

Education:
  • M.Tech., Mechanical Engineering, Indian Institute of Technology, Kanpur
  • B.E., Mechanical Engineering, Indian Institute of Engineering, Science and Technology, Shibpur

Özge Özbayram

Area of work:

Fatigue crack propagation

Education:
  • Ph.D., Civil Engineering, Johns Hopkins University, 2020 –
  • M.S., Civil Engineering, University of Stuttgart, Germany, 2016 – 2019
  • B.S., Civil Engineering, Istanbul Technical University, Turkey, 2009 – 2014

B.S.K. Gargeya

Area of work:

Computational Modelling of Aluminium Alloys

Research Interests:

Multiscale Modelling of Materials Deformation

Education:
  • M.Tech., Materials Engineering, Indian Institute of Science, Bangalore, India (2018-2020)
  • B.Tech., Metallurgical and Materials Engineering, National Institute of Technology Rourkela, India (2014-2018)

Ivory Jamilleth Sarceno

Area of work:

Cold Spray Modeling

Education:
  • B. S., Mechanical Engineering, George Mason University, 2020

Joshua Stickel

Area of work:

Computational image-based multi-scale modeling of fatigue failure in cold sprayed aluminum alloy microstructures

Education:
  • B. S., Mechanical Engineering, George Mason University, 2020

 

Kishore Appunhi Nair

Area of work:

My research is on developing a parametrically homogenized coupled crystal plasticity-phase field model for polycrystalline materials that can predict crack propagation and accounts for crack-tip nucleated dislocations

Education:
  • PhD., Civil Engineering, Johns Hopkins University. (2020-Present)
  • M.Tech., Structural Engineering, Indian Institute of Technology Kharagpur, India (2016-2018)
  • B.Tech., Civil Engineering, National Institute of Technology Calicut, India (2012-2016)

 

Eka Oktavia Kurniati

Area of work:

Material characterization on the additive manufactured component

Education:
  • PhD., Civil Engineering, Johns Hopkins University. (2021-Present)
  • M.S., Aerospace Engineering, Bandung Institute of Technology, Indonesia (2016 – 2017)
  • B.S., Aerospace Engineering, Bandung Insitute of Technology, Indonesia (2012 – 2016)

 

Subham Bose

Area of work:

I am inclined towards exploring the interface of engineering and applied sceinces. Currently I am working on a project closely aligned with Additive Manufacturing.

Education:
  • MTech, Civil Engineering ( major in Structural Engineering), Indian Institute of Science, Bangalore, India (2019-2021)
  • BE, Civil Engineering, Jadavpur University, Kolkata, India, (2014-2018)