Article
Mechanics
Matteo Pastrello, Marco Salviato, Michele Zappalorto
Summary: The study presents new stress distribution equations considering the geometric characteristics of notches and material properties. It analyzes the stress distributions in orthotropic solids under in-plane shear for different geometries, and demonstrates the accuracy of the solutions through numerical analysis.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Engineering, Mechanical
S. H. Sajjadi, A. R. Khorshidvand, M. Jabbari, M. Javadi
Summary: A new brittle fracture criterion was proposed for sharp V-shaped notches, taking into account the effect of shear stress and showing strong correlation with experimental results. This criterion has broad applicability and is capable of predicting fracture in various loading conditions.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Engineering, Mechanical
A. M. Mirzaei, M. R. Ayatollahi, B. Bahrami, F. Berto
Summary: This paper presents a new relation for the stress field around blunt and sharp notches in a linear elastic body, which accurately calculates stress components, reduces free parameters, and determines stress intensity factors for different types of notches, demonstrating improved accuracy compared to existing solutions.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Mechanics
F. Hatami, M. R. Ayatollahi, A. R. Torabi
Summary: The study developed fracture limit curves for key-hole notched components made of brittle materials, and conducted fracture tests to evaluate the influence of notch tip radius on fracture toughness. The results showed good consistency between the experimental data and fracture limit curves, indicating reliable estimation of notch fracture toughness under different loading conditions.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Materials Science, Composites
Xiaocheng Li, Yingying Zhang, Junhao Xu, Lanlan Zhang, Meng Wu, Qichong Zhao
Summary: Tear failure is a significant issue for membrane structures, which can be influenced by parameters such as notch length. Increasing the length of initial notches can decrease tear strength while maintaining elongation at break almost unchanged. Additionally, the distance between multiple notches and the orientation of notches can also impact tear strength and elongation at break.
POLYMER COMPOSITES
(2021)
Article
Engineering, Multidisciplinary
A. M. Mirzaei, B. Bahrami, M. R. Ayatollahi
Summary: This paper presents a simple approximate solution for studying the stress and displacement fields around blunt notches in bimaterial media. The solution is obtained by imposing boundary conditions and is validated using the finite element method.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Computer Science, Interdisciplinary Applications
L. Hug, M. Potten, G. Stockinger, K. Thuro, S. Kollmannsberger
Summary: This contribution presents a novel framework for simulating mixed-mode failure in rock using a hybrid phase-field model. The model introduces separate phase-field variables for tensile and shear fracture and solves the resulting three-field problem using a staggered iteration scheme. The model is validated and shown to accurately reproduce different crack patterns observed in tests. It is also demonstrated that the model can capture complex, 3D mixed-mode crack patterns when calibrated with the correct fracture toughness values.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Multidisciplinary
Dong Yang, Xiaoqiao He, Jiaqi Zhu, Zhiwu Bie
Summary: A novel damage model is proposed in this study to accurately predict quasi-brittle failure under mixed-mode loading, especially shear-dominated loading. The new damage criterion combining bond stretch and dilatational bond potential is first proposed to determine damage initiation. The study also describes the tension softening behavior of quasi-brittle materials and robustly solves the physical nonlinear characteristics using different implicit solution methods.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Engineering, Civil
Pietro Foti, Nima Razavi, Majid Reza Ayatollahi, Liviu Marsavina, Filippo Berto
Summary: This study investigates the application of the strain energy density method to blunt V-notches under mixed loading conditions using finite element models with a free mesh pattern. A new procedure as a post-processing tool is proposed to reduce the workload and calculation time for designers and researchers, compared to the traditional procedure requiring two numerical simulations.
ENGINEERING STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Ali Reza Torabi, Behnam Shahbazian, Mirmilad Mirsayar, Sergio Cicero
Summary: The determination of ductile failure behavior in engineering components weakened by cracks and notches relies heavily on estimating the plastic zone size, particularly the effective plastic zone size. This study proposed a methodology for determining the PZS around blunt V-notches subjected to mixed mode loading and plane-stress conditions. Elastic-plastic finite element analyses were conducted to verify the proposed methodology.
Article
Chemistry, Physical
Ali Arabnia, Javad Akbardoost, Sergio Cicero, Ali Reza Torabi
Summary: This work aims to assess the fracture behavior of rock specimens with sharp V-notches subjected to mixed mode loading. Experimental tests were conducted, and the fracture resistance of the samples was predicted using the MTS-FEM criterion, which showed agreement with the experimental results. The proposed approach has the advantage of not requiring the calculation of stress series expansion coefficients.
Article
Mechanics
Mathias Lebihain, Jean-Baptiste Leblond, Laurent Ponson
Summary: In a previous study, the instability threshold for crack front fragmentation under mixed-mode I+III loading conditions was derived. Numerical simulations showed the significant role of specimen size on non-coplanar instability. The presence of non-singular stresses was found to affect crack front fragmentation, with positive non-singular stresses promoting the process and negative non-singular stresses hindering it.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Review
Mechanics
Richard M. Christensen
Summary: The formalism of isotropic elasticity theory can benefit from a review and re-examination of its structure, leading to a realignment of the basic moduli type properties. Understanding ductile versus brittle failure behaviors becomes more accessible with this approach. The ductile/brittle transition in uni-axial tension can be specified in terms of the two elastic moduli 2 mu and k. The implications of these findings are discussed in the context of general failure theory.
APPLIED MECHANICS REVIEWS
(2023)
Article
Engineering, Multidisciplinary
Alireza Masoumi, Manouchehr Salehi, Mohammad Ravandi
Summary: This study proposes a novel modified bond-based peridynamic model that classifies bonds into horizontal normal, vertical normal, and shear bonds based on equivalent hypothetical local strains. Unlike the classical BB-PD, the proposed model considers all strain components of the bonds and imposes no restrictions on Poisson's ratio. It is validated through the analysis of intact plane stress and plane strain problems subjected to mechanical and thermal loads.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Multidisciplinary
Jichen Zhong, Jiao Wang, Xiangyu Li, Xihua Chu
Summary: Understanding the failure mechanisms of shale-like brittle materials is crucial for engineering safety. This research reconstructed a discrete element model that reflects the real rock properties and failure modes of shale specimens with different bedding angles. It revealed the relationship between micro-crack numbers and macroscopic stress, as well as analyzed the relative movement between deformed blocks. The model can predict the mechanical behavior of brittle rock and guide the application of shale-like brittle materials.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2022)
Article
Chemistry, Physical
F. Berto, P. Lazzarin, M. R. Ayatollahi
Article
Mechanics
Michele Zappalorto, Paolo Lazzarin
ENGINEERING FRACTURE MECHANICS
(2013)
Article
Mechanics
F. Berto, D. A. Cendon, P. Lazzarin, M. Elices
ENGINEERING FRACTURE MECHANICS
(2013)
Article
Mechanics
A. Kotousov, P. Lazzarin, F. Berto, L. P. Pook
ENGINEERING FRACTURE MECHANICS
(2013)
Article
Mechanics
Filippo Berto, Andrei Kotousov, Paolo Lazzarin, Fabio Pegorin
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2013)
Article
Engineering, Mechanical
M. Zappalorto, P. Lazzarin
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2014)
Editorial Material
Engineering, Mechanical
Youshi Hong, Paolo Lazzarin, Rick Neu, Yukitaka Murakami, James Sullivan
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2014)
Article
Engineering, Mechanical
P. Lazzarin, M. Zappalorto, F. Berto
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2015)
Article
Engineering, Mechanical
F. Berto, P. Lazzarin, R. Tovo
INTERNATIONAL JOURNAL OF FATIGUE
(2014)
Article
Materials Science, Multidisciplinary
F. Berto, P. Lazzarin, C. Marangon
MATERIALS & DESIGN
(2014)
Review
Materials Science, Multidisciplinary
F. Berto, P. Lazzarin
MATERIALS SCIENCE & ENGINEERING R-REPORTS
(2014)
Article
Physics, Multidisciplinary
Filippo Berto, Paolo Lazzarin
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2014)
Proceedings Paper
Engineering, Mechanical
David A. Cendon, Filippo Berto, Paolo Lazzarin, Manuel Elices
ADVANCES IN FRACTURE AND DAMAGE MECHANICS XII
(2014)
Proceedings Paper
Engineering, Mechanical
R. Afshar, F. Berto, P. Lazzarin
ADVANCES IN FRACTURE AND DAMAGE MECHANICS XII
(2014)
Proceedings Paper
Engineering, Mechanical
Filippo Berto, Paolo Lazzarin, Majid R. Ayatollahi
ADVANCES IN FRACTURE AND DAMAGE MECHANICS XII
(2014)
