Article
Mechanics
Jose A. Gonilha, David Martins
Summary: This paper presents a numerical investigation on the behavior of GFRP beam-to-column cleated connections using stainless steel cleats. The FE models developed were able to accurately predict the connections' behavior and failure modes, and simulate the experimental results. These models reduce the need for experimental tests and can be used in the design of FRP structures.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Tristan Seidlhofer, Ulrich Hirn, Stephan Teichtmeister, Manfred H. Ulz
Summary: This paper proposes a mechanical model that captures the transient behavior of paper during interaction with water. The model is derived in a thermodynamically consistent manner and is validated through experiments on paper curl. It provides further insights into complex multi-physics problems.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Mechanics
K. N. Cundiff, G. Ayoub, A. A. Benzerga
Summary: A complex constitutive relation is identified using inverse modeling, with a focus on a semicrystalline thermoplastic and strain localization. The response of the material is predicted through finite element analysis and a two-phase constitutive relation, which considers temperature and rate sensitivity, plastic flow, pressure sensitivity, softening, hardening, and crystallinity evolution. The methodology effectively replicates experimental results and provides a simpler alternative to accessing intrinsic behavior.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
C. K. Cocke, H. Mirmohammad, M. Zecevic, B. R. Phung, R. A. Lebensohn, O. T. Kingstedt, A. D. Spear
Summary: This study extends a large-strain FFT-based crystal plasticity model to simulate ductile fracture of polycrystalline materials. By incorporating a triaxiality-based continuum damage mechanics (CDM) formulation into a large-strain elasto-viscoplastic FFT (LS-EVPFFT) framework and using an integral-based nonlocal regularization approach, the model is able to accurately predict the macroscopic stress-strain response and necking behavior of ductile polycrystals.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Engineering, Mechanical
Nathan Bieberdorf, Aaron Tallman, M. Arul Kumar, Vincent Taupin, Ricardo A. Lebensohn, Laurent Capolungo
Summary: In this study, a physics-based crystal plasticity model was developed to predict failure in Grade 91 steel. A material response database and a new reduced-order lifetime predictor were generated, and the proposed lifetime assessment tool predicted rupture times several orders more conservative compared to current empirically derived lifetime relations.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Mathematics, Applied
Grigor Angjeliu, Matteo Bruggi, Alberto Taliercio
Summary: Sequential Linear Analysis (SLA) is a valid alternative for brittle material analysis compared to incremental-iterative finite element solutions. In SLA framework, the no-tension masonry-like material model is implemented in plane stress conditions, with sequential alignment of material axes and reduction of directional stiffness at critical points. It results in compressive stress fields with virtually no tensile stresses.
FINITE ELEMENTS IN ANALYSIS AND DESIGN
(2023)
Article
Engineering, Mechanical
Bjorn Hakon Frodal, Susanne Thomesen, Tore Borvik, Odd Sture Hopperstad
Summary: This study presents a crystal plasticity model that considers the effects of voids or micro-cracks on damage evolution and ductile failure in a single crystal. By simulating the behavior of four different aluminum alloys, the unique properties of each alloy, such as yield strength, work hardening, grain structure, and tensile ductility, are investigated. The capability of the proposed crystal plasticity model is demonstrated through comparison of finite element simulations and experimental tests, showing good agreement between the two and accurate prediction of various shapes of failed specimens.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Mechanics
E. Corona, M. Spletzer, B. T. Lester, C. J. Fietek
Summary: This study conducted numerous experiments and simulations on the puncture of 7075-T651 aluminum alloy plates, and the results show that the material models used in the simulations can accurately predict the puncture speed and failure mode.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Christian Gierden, Julian Kochmann, Johanna Waimann, Tobias Kinner-Becker, Jens Soelter, Bob Svendsen, Stefanie Reese
Summary: The work aims to develop an efficient two-scale numerical scheme for predicting the mechanical behavior of polycrystalline materials at finite strains, based on the relationship between macroscopic constitutive behavior and microstructural deformations. By solving two locally coupled boundary value problems, complex macroscopic problems can be simulated in a two-scale manner efficiently.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Chemistry, Physical
Yousef Navidtehrani, Covadonga Betegon, Emilio Martinez-Paneda
Summary: This study presents a simple and robust implementation of the phase field fracture method in Abaqus, utilizing only the UMAT subroutine and showing potential and robustness in addressing various fracture scenarios. The new implementation is capable of reproducing numerical and experimental results, capturing complex crack trajectories, and solving contact problems efficiently, with the developed code freely available for use.
Article
Materials Science, Multidisciplinary
P. Sudharshan Phani, W. C. Oliver, G. M. Pharr
Summary: The study introduces a new method of indentation testing analysis that explicitly considers elastic effects, leading to improvements in measuring power law creep parameters. The experimental assessment shows equivalence in different indentation creep testing methods for certain materials, while significant differences are observed in others due to indentation size effects. The findings have important implications for widely used indentation creep measurement methods.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Engineering, Mechanical
Paul G. Christodoulou, Sylvain Dancette, Ricardo A. Lebensohn, Eric Maire, Irene J. Beyerlein
Summary: This study investigates the effect of crystallographic orientation and applied triaxiality on the growth of intragranular voids using two 3D micromechanics methods. The results show that loading type significantly influences void growth rate, and void growth is slower in polycrystals compared to single crystals. Furthermore, at the highest triaxiality tested, the correlation between crystal orientation and void growth rate in polycrystals strengthens.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Nanoscience & Nanotechnology
Hongjia Li, Fredrik Larsson, Magnus Hornqvist Colliander, Magnus Ekh
Summary: Anisotropic 1-site and 2-site self-consistent models have been developed to describe the elastic-viscoplastic behavior of polycrystalline materials deformed to finite strains. The choice of rate-dependent constitutive law at single crystal level is discussed and verified through fitting experimental data. Both models have been validated by thoroughly fitting experimental data in literatures.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Engineering, Mechanical
Chris Hardie, Daniel J. Long, Eralp Demir, Edmund Tarleton, Fionn P. E. Dunne
Summary: Conventional crystal plasticity solvers based on Newton-Raphson approach have limited convergence range and often fail when the free variable falls outside this range. This paper introduces a novel formulation that allows the use of an inverted slip law solver, which is not vulnerable to poor pre-conditioning and can start from a stable point. The hybrid scheme presented in this paper combines the reverse scheme and forward scheme to achieve higher convergence rate.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Engineering, Civil
R. Durand, J. F. Vieira, M. M. Farias
Summary: This research proposes a numerical method for simulating prestressed RC beams using advanced finite element models. The method provides realistic simulations and detailed information on deformability, crack patterns, and stress distributions. It includes cohesive elements for simulating concrete fracture, rod elements for simulating reinforcements, and contact elements for predicting relative displacements between rebars and concrete. The method has been validated with experimental data and is capable of capturing the behavior of prestressed RC beams.
ENGINEERING STRUCTURES
(2023)