Article
Engineering, Mechanical
Meizhen Xiang, Songqing Jiang, Junzhi Cui, Yun Xu, Jun Chen
Summary: Researchers developed a continuum model of micro-spalling by coupling hydroelastic-plastic-damage mechanics and high-pressure melting kinetics, successfully simulating plate impact spalling experiments on aluminum while considering both damage and melting effects in the fracture process.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Chemistry, Physical
Gabriela Fojt-Dymara, Marek Opiela, Wojciech Borek
Summary: Tests were conducted on two high-Mn steels with microadditions of Nb and Ti. The study found that the width of the high-temperature brittleness range (HTBR) depends on mechanical properties and microstructural factors. A hot tensile test was performed to determine the temperature of the beginning of hot working, and fractographic research revealed the mechanisms of hot cracking.
Article
Polymer Science
Tae-Kyun Kim, Jong-Sup Park
Summary: The performance of concrete structures can degrade, but can be improved through strengthening methods such as FRPs and PS strands. Evaluation of ductility index using load-displacement results showed that most RC structures are in ductility or semi-ductility sections, while most PSC structures are brittle.
Article
Engineering, Mechanical
C. A. Bronkhorst, H. Cho, P. W. Marcy, S. A. Vander Wiel, S. Gupta, D. Versino, V. Anghel, G. T. Gray
Summary: Accurately representing porosity-based ductile damage in polycrystalline metallic materials remains a significant challenge, but a soft-coupled linkage technique between a macro-scale damage model and micro-mechanical calculations has shown promise in this study. The micro mechanical model captures non-Schmid effects and suggests significant influences on local stress conditions across grain boundaries and triple junctions within the polycrystalline network.
INTERNATIONAL JOURNAL OF PLASTICITY
(2021)
Article
Mechanics
Bing Wang, Zhanqiang Liu, Haiming Zhang, Jinfu Zhao, Qinghua Song
Summary: This paper investigates the dynamic deformation and fracture mechanisms of Ti6Al4V over a wide strain rate range. A new rate-dependent material damage law is proposed, and the research shows the importance of developing appropriate damage evolution law to improve prediction accuracy of material deformation and guarantee structural design safety, especially for dynamic loading components.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
S. Reese, T. Brepols, M. Fassin, L. Poggenpohl, S. Wulfinghoff
Summary: The paper introduces a new anisotropic damage model derived using the structural tensors approach, aimed at modeling materials in the finite strain regime, particularly ductile materials like metals. It also discusses the coupling of this damage model with finite elasto-plasticity and the formulation of evolution equations for plastic deformation, damage tensor, plastic and damage hardening.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2021)
Article
Computer Science, Interdisciplinary Applications
Dragan D. Milasinovic, Aleksandar Landovic, Danica Goles
Summary: This paper addresses the fatigue damage problem of reinforced concrete frames in bending using the rheological-dynamical analogy method and finite element modal analysis. It recommends determining the modulus of elasticity through non-destructive methods for better objectivity and predictability of the frame's ductility. The study presents a novel method considering both creep and aging coefficients, with original characterization of structural damping via the damping ratio.
ENGINEERING COMPUTATIONS
(2022)
Article
Nanoscience & Nanotechnology
Shota Kariya, Ammarueda Issariyapat, Abdollah Bahador, Junko Umeda, Jianghua Shen, Katsuyoshi Kondoh
Summary: By redistributing oxygen solutes and performing heat treatment and water quenching, a heteromicrostructure consisting of two phases with different oxygen contents was synthesized, which significantly improved the ductility of high oxygen titanium materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Mathematics, Interdisciplinary Applications
Alban de Vaucorbeil, Vinh Phu Nguyen, Chi Nguyen-Thanh
Summary: Karamelo is a simple and robust C++ code for the material point method (MPM), designed to provide an open source, fast, light and easy-to-modify framework for research and application in MPM. The paper introduces the philosophy, design choices, and original algorithms implemented in Karamelo, along with simulations to demonstrate its capabilities.
COMPUTATIONAL PARTICLE MECHANICS
(2021)
Article
Engineering, Mechanical
Giuseppe Mirone, Raffaele Barbagallo
Summary: There is still room for improvements in material characterization at high strain rates, particularly in understanding the interactions between strain, strain rate, and temperature effects. This study analyzed the behavior of A2-70 stainless steel at different strain rates and temperatures, highlighting how strain rate and temperature sensitivities affect necking onset and hardening. The experimental results showed that inertia effect plays a secondary role in necking onset, and parameters based on specimen diameter can quantify the approximation intrinsic to simplified calculations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Dongdong Ma, Jiaming Yuan, Huasong Xiang, Zhiwei Zhou, Yizhong Tan, Kun Huang
Summary: This study used a soil-ice particle mixing method to prepare ice-rich frozen sandy soil specimens and investigated their mechanical behaviors under different negative temperatures and total moisture contents. The melting of ice particles due to temperature rise was identified as temperature damage, while the combined action of crack propagation and temperature rise was considered as the damage mechanism during the failure process of ice-rich sandy frozen soil specimens. The relationship between temperature rise value and dynamic strain was analyzed based on heat conduction theory, and the phase transition equilibrium between unfrozen water and effective ice was used to determine the variation in ice volume content as temperature rises. A damage constitutive model incorporating a compound damage variable was proposed and validated through comparison with experimental data.
MECHANICS OF MATERIALS
(2023)
Article
Construction & Building Technology
Hatem H. Almasaeid, Akram Suleiman, Rami Alawneh
Summary: The study aims to develop an artificial neural network model based on destructive and non-destructive testing results to assess concrete strength after high-temperature exposure without the need for further destructive testing. The results suggest a high correlation between non-destructive and destructive testing results.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jianfeng Zhao, Baoxi Liu, Yanfei Wang, Yanxiang Liang, Jicheng Li, Xu Zhang
Summary: Gradient nano-grained (GNG) metals exhibit superior strength-ductility synergy compared to homogeneous counterparts. This study develops a dislocation density-based strain gradient plasticity model coupled with a damage model to describe the strain hardening and softening behavior of GNG material. The results predict the tensile response of GNG nickel with varying degrees of grain size gradient, revealing that dispersed strain bands stabilize in the nano-grained surface layer and improve ductility. The method developed in this study enhances the understanding of strength-ductility synergy and optimization of microstructure gradient in GNG materials.
MECHANICS OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jianlin Tian, Liangqing Wang, Cailong An, Qiong Wu, Zihao Sun, Rui Ke
Summary: A model material suitable for analyzing the stability of sandstone slopes during strong earthquakes was developed by designing an orthogonal test and selecting dynamic and static parameters. Sensitivity analysis and multiple linear regression analysis were used to establish the quantitative relationship between physico-mechanical parameters and component proportions, and determine the suitable proportions for a model of the rock mass in a specific area.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Mechanical
Eui-Kyun Park, Gyo-Geun Youn, Yun-Jae Kim, Robert A. Ainsworth
Summary: This work quantifies the effect of material ductility on notch fracture resistance using FE damage analysis, revealing a linear relationship between notch fracture resistance, notch radius, and material ductility. The results provide useful insights for estimating notch fracture resistance based on material ductility and J-resistance curves obtained from cracked specimens.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Mechanics
F. Sarasini, J. Tirillo, L. Lampani, M. Sasso, E. Mancini, C. Burgstaller, A. Calzolari
COMPOSITE STRUCTURES
(2019)
Article
Automation & Control Systems
Michela Simoncini, Archimede Forcellese, Edoardo Mancini, Gianluca Chiappini, Marco Sasso
Summary: The study found that the formability of AA6082-T6 aluminum alloy significantly improves as the strain rate increases under dynamic conditions, as shown in the investigation of the forming limit curves using high strain rates.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Mechanics
Claudia Sergi, Fabrizio Sarasini, Jacopo Tirillo, Enrique Barbero, Sonia Sanchez-Saez, Marco Sasso, Edoardo Mancini
Summary: The study compared the compressive behavior of synthetic foam and environmentally friendly agglomerated cork under different conditions, revealing the remarkable strain rate sensitivity and increased compressive properties with higher strain rate for both materials. Additionally, a decrease in absorbed energy percentage due to embrittlement effect at lower temperatures was observed. Despite noticeable anisotropy, agglomerated cork is confirmed as a sustainable alternative to petroleum-based core materials with higher dimensional stability for sandwich structures.
COMPOSITE STRUCTURES
(2021)
Article
Chemistry, Physical
Francesca Campana, Edoardo Mancini, Daniela Pilone, Marco Sasso
Summary: The research on the Al 6061 aluminum foams focused on the correlation between foam composition and morphology and its mechanical response under dynamic conditions. The dynamic tests highlighted the excellent energy absorption capability of the foam due to its ductile behavior. However, it was found that cell morphology and distribution affect the mechanical behavior of the foam in dynamic conditions.
Article
Engineering, Mechanical
Mattia Utzeri, Ajay Bhagavatam, Edoardo Mancini, Guru Dinda, Marco Sasso, Golam Newaz
Summary: This study investigated the compression behavior of Inconel 625 fabricated by LMD, proposing a modified mechanical model to describe its specific mechanical properties, and used multiple models to represent the effects of strain rate and temperature on material properties.
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Materials Science, Multidisciplinary
Mattia Utzeri, Emanuele Farotti, Mattia Coccia, Edoardo Mancini, Marco Sasso
Summary: This study investigates the mechanical properties of Carbon-PA in different conditions, conducting static and dynamic tests and analyzing the samples through tomography. The results show compression behavior dependent on printing direction and strain rate.
JOURNAL OF MATERIALS RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Edoardo Mancini, Francesca Campana, Daniela Pilone, Dario Amodio, Marco Sasso
Summary: The objective of this paper is to implement a material model that considers statistical distribution to mitigate uncertainty in the compression behavior of cellular materials. By conducting morphological and topological analyses on AA7075T6 foam samples and comparing them with experimental results, an equivalent material model has been proposed.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Gabriele Cortis, Ilaria Mileti, Filippo Nalli, Eduardo Palermo, Luca Cortese
Summary: Total hip arthroplasty is a common surgical procedure to restore hip joint mobility, but it may lead to stress-shielding phenomenon. This study introduces an innovative prosthesis design utilizing Additive Manufacturing techniques and assesses structural integrity with a ductile damage numerical approach. Different prosthesis geometries were compared through Finite Element simulations, leading to the selection of a promising design to mitigate stress shielding while ensuring structural safety under various loading conditions.
MECHANICS OF MATERIALS
(2022)
Proceedings Paper
Computer Science, Theory & Methods
Francesco Castelli Gattinara Di Zubiena, Federica Perugini, Marco Germanotta, Irene Aprile, Gabriele Cortis, Zaccaria del Prete, Eduardo Palermo
Summary: The lack of proprioception in lower limb amputees can impact balance and increase the risk of falls, but using an elastomeric sensor as a strain sensor shows promising results for future application in the ankle region.
2021 IEEE INTERNATIONAL WORKSHOP ON METROLOGY FOR INDUSTRY 4.0 & IOT (IEEE METROIND4.0 & IOT)
(2021)
Proceedings Paper
Engineering, Manufacturing
Edoardo Mancini, Emanuele Farotti, Chiara Paoletti, Marco Sasso
PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING (ESAFORM 2019)
(2019)
Article
Materials Science, Multidisciplinary
E. Farotti, E. Mancini, T. Bellezze, M. Sasso
JOURNAL OF DYNAMIC BEHAVIOR OF MATERIALS
(2019)