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Roberto Ballarini
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Journal Articles

Stochastic Buckling of Geometrically Imperfect Beams on Elastic Foundation

Zheren Baizhikova, Jia-Liang Le, Roberto Ballarini
Journal: Journal of Applied Mechanics
Article Type: Research Papers
J. Appl. Mech. January 2023, 90(1): 011003.
Paper No: JAM-22-1308
DOI: https://doi.org/10.1115/1.4055811
Published Online: October 13, 2022
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Topics: Buckling, Stress, Statistics
Proceedings Papers

Fatigue and Fracture Testing of Microelectromechanical Systems

Roberto Ballarini, Robert L. Mullen, Harold Kahn, Arthur H. Heuer
Proc. ASME. IMECE98, Mechanical Behavior of Advanced Materials, 151-152, November 15–20, 1998
Paper No: IMECE1998-1152
DOI: https://doi.org/10.1115/IMECE1998-1152
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Topics: Fatigue, Fracture (Materials), Fracture (Process), Microelectromechanical systems, Testing, Bending strength, Crack propagation, Design, Dimensions, Electrostatic actuators
Proceedings Papers

The Fracture Mechanics of Microelectromechanical Systems

Roberto Ballarini
Proc. ASME. IMECE98, Mechanical Behavior of Advanced Materials, 185, November 15–20, 1998
Paper No: IMECE1998-1165
DOI: https://doi.org/10.1115/IMECE1998-1165
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Topics: Fracture mechanics, Microelectromechanical systems, Fatigue cracks, Fracture toughness, Stress corrosion cracking
Journal Articles

Enhanced Pseudo-Three-Dimensional Model for Multiple Hydraulic Fractures

Innokentiy Protasov, Egor Dontsov, Roberto Ballarini
Journal: Journal of Applied Mechanics
Article Type: Research Papers
J. Appl. Mech. January 2021, 88(1): 011003.
Paper No: JAM-20-1371
DOI: https://doi.org/10.1115/1.4048375
Published Online: October 7, 2020
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Topics: Fracture (Materials), Fracture (Process), Stress
Journal Articles

A Renewal Weakest-Link Model of Strength Distribution of Polycrystalline Silicon MEMS Structures

Zhifeng Xu, Roberto Ballarini, Jia-Liang Le
Journal: Journal of Applied Mechanics
Article Type: Research-Article
J. Appl. Mech. August 2019, 86(8): 081005.
Paper No: JAM-19-1087
DOI: https://doi.org/10.1115/1.4043440
Published Online: May 17, 2019
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Topics: Failure, Microelectromechanical systems, Size effect, Statistics, Stress, Polysilicon, Reliability, Strength (Materials), Geometry
Journal Articles

Modeling Flow in Porous Media With Double Porosity/Permeability: Mathematical Model, Properties, and Analytical Solutions

Kalyana B. Nakshatrala, Seyedeh Hanie S. Joodat, Roberto Ballarini
Journal: Journal of Applied Mechanics
Article Type: Research-Article
J. Appl. Mech. August 2018, 85(8): 081009.
Paper No: JAM-18-1094
DOI: https://doi.org/10.1115/1.4040116
Published Online: June 4, 2018
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Topics: Boundary-value problems, Flow (Dynamics), Mass transfer, Permeability, Porosity, Porous materials, Energy dissipation, Pressure, Fluids
Includes: Supplementary data
Journal Articles

Closed-Path J -Integral Analysis of Bridged and Phase-Field Cracks

Roberto Ballarini, Gianni Royer-Carfagni
Journal: Journal of Applied Mechanics
Article Type: Research-Article
J. Appl. Mech. June 2016, 83(6): 061008.
Paper No: JAM-16-1110
DOI: https://doi.org/10.1115/1.4032986
Published Online: March 29, 2016
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Topics: Fracture (Materials), Tensors
Proceedings Papers

Local-Global Analysis of Crack Growth in Continuously Reinforced Ceramic Matrix Composites

Roberto Ballarini, Shamim Ahmed
Proc. ASME. GT1989, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; General, V005T12A006, June 4–8, 1989
Paper No: 89-GT-138
DOI: https://doi.org/10.1115/89-GT-138
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Topics: Ceramic matrix composites, Fracture (Materials), Composite materials, Failure, Anisotropy, Fibers, Finite element analysis, Springs
Proceedings Papers

Stability Analysis of Bridged Cracks in Brittle Matrix Composites

Roberto Ballarini, Sandeep Muju
Proc. ASME. GT1991, Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, V005T13A005, June 3–6, 1991
Paper No: 91-GT-094
DOI: https://doi.org/10.1115/91-GT-094
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Topics: Brittleness, Composite materials, Fracture (Materials), Stability, Fibers, Stress, Crack propagation, Deflection, Failure, Finite element analysis
Journal Articles

Distinct Element Method Modeling of Carbon Nanotube Bundles With Intertube Sliding and Dissipation

Igor Ostanin, Roberto Ballarini, Traian Dumitrică
Journal: Journal of Applied Mechanics
Article Type: Research-Article
J. Appl. Mech. June 2014, 81(6): 061004.
Paper No: JAM-13-1487
DOI: https://doi.org/10.1115/1.4026484
Published Online: February 3, 2014
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Topics: Carbon nanotubes, Energy dissipation, Discrete element methods, Deformation, Simulation
Journal Articles

Toward Distinct Element Method Simulations of Carbon Nanotube Systems

Tyler Anderson, Evgeniya Akatyeva, Ilia Nikiforov, David Potyondy, Roberto Ballarini, Traian Dumitrică
Journal: Journal of Nanotechnology in Engineering and Medicine
Article Type: Research Papers
J. Nanotechnol. Eng. Med. November 2010, 1(4): 041009.
DOI: https://doi.org/10.1115/1.4002609
Published Online: October 27, 2010
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Topics: Carbon nanotubes, Discrete element methods, Simulation
Journal Articles

A Long Crack Penetrating a Transforming Inhomogeneity

Yuping Wang and, Roberto Ballarini
Journal: Journal of Applied Mechanics
Article Type: Brief Notes
J. Appl. Mech. July 2004, 71(4): 582–585.
DOI: https://doi.org/10.1115/1.1767166
Published Online: September 7, 2004
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Topics: Dislocations, Fracture (Materials), Stress, Elastic moduli