Chandrasekhar Annavarapu

Research from our group is published in highly reputed archival computational journals such as the International Journal for Numerical Methods in Engineering, and Computer Methods in Applied Mechanics and Engineering. Our research has also been patented by the United States patent office. A complete list of my publications can be seen on my Google scholar profile: Annavarapu, C.

Peer-reviewed Journals:

Munshi, W. N., Fehling, M., Bangerth, W., Annavarapu, C. "An Open-Source Implementation of the Hybrid Phase Field Method for 3D Fracture Modeling Based on deal.ii", submitted
Munshi, W. N., Annavarapu, C., Mulay, S. S., Rodriguez-Ferran, A. "A Phase-Field Approach for Modeling Three-Dimensional Crack Interactions in Layered Materials", submitted
Roy, S., Annavarapu, C., Roy, P., Sarma, A., K. "Adaptive Interface-PINNs (AdaI-PINNs): An efficient physics-informed neural networks framework for interface problems", Commun. Comput. Phys., 37(3):603–622, 2025
Nguyen, D. T., Gupta, A., Duddu, R., Annavarapu, C. "An adaptive mesh refinement algorithm for stress-based phase field fracture models for heterogeneous media: Application using FEniCS to ice-rock cliff failures", Finite Elem. Anal. Des., 244: 104311, 2025
Roy, S., Sarkar, D. R., Annavarapu, C., Roy, P., Lecampion, B., Valiveti, D., M. "Adaptive Interface-PINNs (AdaI-PINNs) for Transient Diffusion: Applications to Forward and Inverse Problems in Heterogeneous Media", Finite Elem. Anal. Des., 244: 104305, 2025
Khan, S., Singh, I., Annavarapu, C., Rodríguez-Ferran, A. "Adaptive phase-field modeling of fracture propagation in layered media: Effects of mechanical property mismatches, layer thickness, and interface strength", Eng. Fract. Mech., 314: 110672, 2025
Sarkar, D. R., Annavarapu, C., Roy, P. "Adaptive Interface-PINNs (AdaI-PINNs) for Inverse Problems: Determining Material Properties for Heterogeneous Systems", Available at SSRN 4993297, 2024
Roy, S., Annavarapu, C., Roy, P., Valiveti, D., M. "Physics-informed neural networks for heterogeneous poroelastic media", Int. J. Comp. Meth. Eng. Sci. Mech., 1–21, 2024
Sarma, A., K., Roy, S., Annavarapu, C., Roy, P., Jagannathan, S. "Interface PINNs (I-PINNS): A physics-informed neural networks framework for interface problems", Comput. Meth. Appl. Mech. Engrg., 429: 117135, 2024
Jain, I., Muixí, A., Annavarapu, C., Mulay, S. S., Rodríguez-Ferran, A. "Adaptive phase-field modeling of fracture in orthotropic composites", Eng. Fract. Mech., 292: 109673, 2023
Khan, S., Muixí, A., Annavarapu, C., Rodríguez-Ferran, A. "Adaptive phase-field modeling of fracture propagation in bi-layered materials", Eng. Fract. Mech., 292: 109650, 2023
Jain, I, Annavarapu, C., Mulay, S., S., Rodriguez-Ferran, A. "Numerical modeling of fracture propagation in orthotropic composite materials using an adaptive phase-field method", Int. J. Adv. Eng. Sci. Appl. Math., 15: 144–154, 2023
Khan, S., Annavarapu, C., Rodriguez-Ferran, A. "Investigation on the effect of material mismatch between two dissimilar materials using an adaptive phase-field method", Int. J. Adv. Eng. Sci. Appl. Math., 15: 173–186, 2023
Jiang, W., Liu, Y., Annavarapu, C. "A weighted Nitsche's method for interface problems with higher-order simplex elements", Comp. Mech., 69(5): 1115–1129, 2022
Ghosh, G., Duddu, R., Annavarapu, C. "On the robustness of the stabilized finite element method for delamination analysis of composites using cohesive elements", Int. J. Comp. Meth. Eng. Sci. Mech., 22(6): 538–558, 2021
Ghosh, G., Duddu, R., Annavarapu, C. “A stabilized finite element method for enforcing stiff anisotropic cohesive laws using interface elements”, Comput. Meth. Appl. Mech. Engrg., 348: 1013–1038, 2019
Vogler, D., Settgast, R. R., Annavarapu, C. et al. “Experiments and Simulations of Fully Hydro-Mechanically Coupled Response of Rough Fractures Exposed to High Pressure Fluid Injection”, Journal of Geophysical Research: Solid Earth, 123(2): 1186-1200, 2018
Settgast, R. R., Fu, P., Walsh, S. D. C., White J. A., Annavarapu C., et al. “A fully coupled Finite Element/Finite Volume method for the massively parallel simulation of hydraulically driven fractures in 3-Dimensions”, Int. J. Numer. Anal. Meth. Geomech., 41(5): 627–653, 2017
Annavarapu, C., Settgast, R. R., Johnson, S.M., Fu, P., Herbold, E.B., "A local crack-tracking strategy to model three-dimensional crack propagation with embedded methods", Comput. Meth. Appl. Mech. Engrg., 311:815-837, 2016
Annavarapu, C., Settgast, R. R., Johnson, S.M., Fu, P., Herbold, E.B., "A weighted Nitsche stabilized method for small-sliding contact on frictional surfaces", Comput. Meth. Appl. Mech. Engrg., 283:763-781, 2015
Jiang, W., Annavarapu, C., Dolbow, J., Harari, I., "A robust Nitsche's formulation for interface problems with spline based finite elements", Int. J. Num. Meth. Engrg., 104(7): 676-696, 2015
Annavarapu, C., Hautefeuille, M., Dolbow, J., “A Nitsche stabilized finite element method for frictional sliding on embedded interfaces. Part I: Single interface”, Comput. Meth. Appl. Mech. Engrg., 268:417-436, 2014
Annavarapu, C., Hautefeuille, M., Dolbow, J., “A Nitsche stabilized finite element method for frictional sliding on embedded interfaces. Part II: Intersecting interfaces”, Comput. Meth. Appl. Mech. Engrg., 267:318-341, 2013
Annavarapu, C., Hautefeuille, M., Dolbow, J., “A robust Nitsche’s formulation for interface problems”, Comput. Meth. Appl. Mech. Engrg., 225–228(4):44-54, 2012
Annavarapu, C., Hautefeuille, M., Dolbow, J., “Stable imposition of stiff constraints in explicit dynamics for embedded finite element methods ”, Int. J. Num. Meth. Engrg., 92(2):206-228, 2012
Hautefeuille, M., Annavarapu, C., Dolbow, J., “Robust imposition of Dirichlet boundary conditions on embedded surfaces”, Int. J. Num. Meth. Engrg., 90(1):40-64, 2012
Nallathambi, A.K., Doraiswamy, S., Chandrasekhar, A.S., Srinivasan, S.M.,“A 3-species model for shape memory alloys”, Int. J. Struct. Changes in Solids, 1(1):149-170, 2009
Iyer, M., Kiranmayi, L., Chandrasekhar, A.S., Sivakumar, S.M, “Analysis for damping in structures braced with superelastic SMA wires”, J. Struct. Engrg., 36(2):106-113, 2009

Peer-reviewed Conference Proceedings:

Sarma, A., Annavarapu, C. et al. "Variational Interface Physics Informed Neural Networks (VI-PINNs) for Heterogeneous Subsurface Systems", Proceedings of the 57th U.S. Rock Mechanics/Geomechanics Symposium, Atlanta, USA, 2023
Ghosh, G., Annavarapu, C. et al. "A stabilized finite element formulation remedying traction oscillations in cohesive interface elements", Proceedings of the American Society for Composites—Thirty-third Technical Conference on Composite Materials, Seattle, Washington, USA, 2018
Settgast, R. R., Vorobiev, O. Y., Morris, J. P., Herbold, E. B., Homel, M. A., Annavarapu, C. “ Modeling of Fracture Opening by Explosive Products”, Proceedings of the 51st U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, USA, 2017
Ghosh, G., Annavarapu, C. et al. “ A Stabilized Finite Element Method for Modeling Mixed-Mode Delamination of Composites”, Proceedings of the 32nd American Society for Composites Annual Technical Conference, Purdue University, West Lafayette, Indiana, USA, 2017
Vogler, D., Settgast, R. R., Annavarapu, C. et al., "Fully Hydro-Mechanically Coupled Experiments and Simulations on Rough Fractures Subjected to High-Pressure Fluid Injection", American Geophysical Union Fall Meeting, San Francisco, CA, USA, 2016
Vogler, D., Settgast, R. R., Annavarapu, C. et al. “Hydro-Mechanically Coupled Flow through Heterogeneous Fractures”, Proceedings of the 41st Workshop on Geothermal Reservoir Engineering, Stanford, CA, USA, 2016
Settgast, R. R., White, J. A., Annavarapu, C. et al., "A Fully Coupled Finite Element/Finite Volume Method for the Massively Parallel Simulation of Hydraulically Driven Fractures in 3-Dimensions", The 7th International Conference on Computational Methods, Berkeley, CA, USA, 2016
Annavarapu, C. et al. “A Stabilized Finite Element Approach to Model Contact Constraints in Subsurface Media”, Proceedings of the 48th U.S. Rock Mechanics/Geomechanics Symposium, University of Minnesota, Minneapolis, MN, USA, 2014

International Conference Presentations and Abstracts:

Invited Seminars

"Phase-field modeling of crack growth in layered media", 6th Indian Conference on Applied Mechanics, National Institute of Technology Warangal, Warangal, India, July 12, 2024
"On the use of Nitsche's method for enforcing contact constraints and stiff cohesive laws", Laboratori de Càlcul Numeric, Universitat Politècnica de Catalunya, Barcelona, Spain, July 14, 2023
"Finite element methods for interface problems", National Institute of Technology Warangal, Warangal, India, August 28, 2020
"Finite element methods for interface problems", Indian Institute of Science, Bengaluru, India, April 28, 2018
“A Fully Coupled 3D Model for Hydraulic Fracturing: A Field-Scale Case Study in the Vaca Muerta Formation”, Centre Scientifique et Technique Jean Fger (CSTJF), Total, S. A., , Pau, France, March 12–26, 2018
“Finite Element Methods for Interface Problems”, ExxonMobil Upstream Research Corporation, Houston, Texas, USA, February 14–15, 2018
“A fully coupled Finite Element/Finite Volume method for the massively parallel simulation of hydraulically driven fractures in 3-Dimensions”, VII International Conference on Coupled Problems in Science and Engineering, Rhodes Island, Greece, June 12–14, 2017
“Embedded interfaces in finite element methods”, School of Earth Sciences, Stanford University, USA, September 2014
“Stable imposition of stiff embedded constraints in explicit dynamics”, Department of Applied Mechanics, Indian Institute of Technology, Madras, November 2011

Conference Talks Delivered:

"Numerical modelling of fracture propagation in layered materials using an adaptive phase-field method", 5th Indian Conference on Applied Mechanics, Jamshedpur, India, Nov. 11–13, 2022
"An adaptive phase-field method for modeling fracture propagation in a bi-layered medium", 8th European Congress on Computational Methods in Applied Sciences and Engineering, Oslo, Norway, Jun. 5–9, 2022
"A stabilized finite element method for enforcing stiff anisotropic cohesive laws using interface elements", 14th World Congress on Computational Mechanics, Paris, France, Jan. 11–15, 2021
“A local crack-tracking strategy to model three-dimensional crack propagation with embedded methods”, 14th U.S. National Congress on Computational Mechanics, Montreal, Canada, July 17–20, 2017
“A fully coupled Finite Element/Finite Volume method for the massively parallel simulation of hydraulically driven fractures in 3-Dimensions”, 7th International Conference on Computational Methods, University of California, Berkeley, USA, August 1–4, 2016
“A phantom node approach for modeling intersecting fractures”, Engineering Mechanics Institute Conference, Vanderbilt University, Nashville, USA, May 22–25, 2016
“A phantom node approach for modeling complex fracture networks”, 13th U.S. National Congress on Computational Mechanics, San Diego, USA, July 26–30, 2015
“A weighted Nitsche stabilized method for small-sliding contact on frictional surfaces”, Engineering Mechanics Institute Conference, Stanford University, USA, June 16–19, 2015
“A Nitsche stabilized finite element approach for modeling frictional contact constraints”, 11th World Congress on Computational Mechanics, Barcelona, Spain, July 20–25, 2014
“A robust Nitsche’s formulation for interface problems”, 10th World Congress on Computational Mechanics, São Paulo, Brazil, July 8–13, 2012
“Stable imposition of stiff constraints over embedded surfaces in explicit dynamics”, 11th U.S. National Congress on Computational Mechanics, Minneapolis, USA, July 25–28, 2011
“Stable imposition of Dirichlet boundary conditions and stiff constraints for embedded finite element methods", 11th U.S. National Congress on Computational Mechanics, Minneapolis, USA, July 25-28, 2011

Technical Reports and Theses:

Settgast, R. R. et al., "GEOSX Simulation Framework", Lawrence Livermore National Laboratory Technical Report, 2018
Settgast, R. R. et al., "GEOS: a framework for massively parallel multi-physics simulations. theory and implementation", Lawrence Livermore National Laboratory Technical Report, 2014
Annavarapu, C., “An efficient finite element method for interface problems”, Ph. D. Thesis, 2013

Patents:

Annavarapu, C. et al. “A Model for Coupled Porous Flow and Geomechanics for Subsurface Simulation”, United States Patent Office, submitted, 2019

Valiveti, D. M., Annavarapu, C. et al. “A Method for Simulation of Fracture Propagation in Subsurface Rocks”, United States Patent Office, submitted, 2019

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