Article
Engineering, Civil
Gregorio F. O. Ferreira, Jose Humberto S. Almeida, Marcelo L. Ribeiro, Antonio J. M. Ferreira, Volnei Tita
Summary: This study proposes a novel method to develop higher-order finite elements by considering progressive damage. The approach, based on Carrera's unified formulation, utilizes a damage model derived from continuum damage mechanics principles. The implemented User Element subroutine is capable of accurately and swiftly predicting progressive failure events and in-plane damage mechanisms for composite laminates under bending loadings, as observed in comparison to experimental results.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Johannes Reiner
Summary: This paper presents a generic strategy to generate macroscopic continuum damage models using non-local averaging, and calibrates the model with experimental data for specific carbon fiber-reinforced composites. The results show that non-local modeling enables more realistic simulation of damage, and suggest choosing a small enough averaging radius to avoid significant increase in computational cost.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Felipe Ruivo Fuga, Mauricio Vicente Donadon
Summary: Efficient and reliable predictive modelling tools for damage tolerance analysis are crucial in the aerospace industry due to the potential of composite materials for design performance. Different approaches have been developed for interlaminar and intralaminar damage over the years. This study proposes a novel progressive damage model that addresses some shortcomings of current intralaminar Continuum Damage Mechanics (CDM) models, and compares the model predictions to experimental data through static and fatigue analysis.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Mechanics
Jian Deng, Pu Xue, Qiao Zhi Yin, Tian Jian Liu, Xin Wei Wang
Summary: In this study, a three-dimensional damage analysis framework based on the finite element method was proposed to predict the damage evolution and load-bearing capacity of fiber-reinforced composites. The framework accounted for stress interaction, coupling effect, and addressed the issue of finite element mesh dependency.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Johannes Reiner, Reza Vaziri, Navid Zobeiry
Summary: The study proposed a data-rich framework to characterize the macroscopic strain-softening response of laminated composites under compressive loading using machine learning models. By simulating compression tests with an efficient FE model and training two ML methods, the study successfully demonstrated the effectiveness of using ML to reduce experimental efforts for damage characterization in composites subjected to compressive loads.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Johannes Reiner, Yun-Fei Fu
Summary: Genetic algorithms are used to identify input parameters for simulating progressive damage in carbon fiber reinforced polymers. The simulation of low velocity impact tests validates the data-driven parameter identification and the capability to account for different types of damage. The efficient modeling technique can simulate impact tests in a short amount of time with realistic representations of delamination, enhancing the transparency and repeatability of finite element simulations of composites.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Mechanical
Naidan Hou, Renxi Zhao, Jian Li, Xuan Wang, Xi Li, Hao Cui, Yulong Li
Summary: This study investigates the damage caused by rain erosion on aircraft during supersonic flight through high-speed waterjet impact experiments on composite laminates. The experiment and simulation results confirm the effectiveness of the numerical methods used. The study finds that water-hammer pressure, stagnation pressure, and stress wave propagation are the main failure mechanisms for matrix damage in CFRP impacted by waterjets. The velocity and diameter of the waterjets are crucial factors affecting the extent of damage on CFRP.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Mechanical
Zhengliang Liu, Leilei Yan, Zhen Wu, Jie Zhou, Haolin Wei, Senlin Zhang, Xiaohui Ren
Summary: In this study, a new user subroutine element is proposed to investigate the failure behavior of open-hole composite laminates under compression loads. The proposed element, constructed using the third-order shear deformation theory and a two-dimensional progressive damage model, includes fiber kink model and Puck criterion for failure analysis of fiber and matrix. The element weakening method is utilized to predict the damage evolution of open-hole composite laminates under compression loads. Compression tests of open-hole composite laminates are conducted to validate the proposed model, with a percentage error of 6.1% in predicting the failure load.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Materials Science, Composites
Johannes Reiner, Nhu H. T. Nguyen
Summary: This study proposes a Discrete Element Method (DEM) for analyzing the progressive failure of IM7/8552 carbon fiber reinforced polymer laminates at the macroscale. The DEM model is calibrated using experimental results from over-height compact tension (OCT) tests and validated with various open-hole tension (OHT) test specimens. The results show that DEM can incorporate damage evolution leading to realistic macroscopic damage patterns, but with a computational cost 100 times higher than finite element (FE) simulations.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Materials Science, Composites
Johannes Reiner, Navid Zobeiry, Reza Vaziri
Summary: A simple and efficient finite element modelling approach is presented for simulating the residual strength of carbon fiber reinforced composite laminates after impact, with results showing reasonable predictions for different laminate structures and errors ranging from 10% to 30%.
COMPOSITES COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
J. Llobet, P. Maimi, Y. Essa, F. Martin de la Escalera
Summary: The mesoscale continuum damage model for laminated composites developed by the AMADE research group over the past 10 years has been extended for fatigue life and residual strength predictions. The model includes new functions to account for material degradation under fatigue loads and uses the cycle jump approach to reduce computational cost. Validation of the computational model was done by simulating progressive failure mechanisms of open-hole and double-edge notched specimens under various load cases in the follow-up publication.
MECHANICS OF MATERIALS
(2021)
Article
Mechanics
Weimin Zhuang, Hailun Zhang, Enming Wang, Shen Chen, Yang Liu
Summary: This paper proposes a 3D continuum damage mechanics (CDM) model to investigate the mechanical behaviors of carbon fiber-reinforced polymer (CFRP) laminates under pull-through failure. The proposed model integrates intralaminar and interlaminar damage models and uses a user-defined subroutine for implementation. The numerical results match well with experiments and effectively reproduce the load-displacement response, damage modes, failure behaviors, and damaged areas. This study provides an accurate and efficient computational methodology to analyze pull-through failures in composite joints under out-of-plane loads.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Shu Li, Zhaoyang Ma, Qingda Yang
Summary: In this paper, the two-dimensional orthotropic augmented finite element method (A-FEM) is used to study the progressive failure of composite laminates under transverse loading, considering major cracking modes. High-fidelity simulations and experimental results demonstrate the numerical capability of A-FEM, and the influence of stacking sequence on failure mechanism is also investigated.
INTERNATIONAL JOURNAL OF APPLIED MECHANICS
(2022)
Article
Mechanics
X. Lu, X. M. Guo
Summary: In this study, a non-local continuum damage model is developed to analyze the progressive failure of laminated composites. The model incorporates an orthotropic non-local integral strategy with two internal length scales, allowing for accurate predictions of damage evolution. Additionally, an interactive damage transfer scheme is proposed to capture the interaction between matrix cracking and interface delamination. The model demonstrates superior performance over conventional methods in predicting the complex failure mechanisms of composite laminates.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Zhaoyang Ma, Jianlin Chen, Qingda Yang, Zheng Li, Xianyue Su
Summary: The C-AFEM method combined with CZM elements accurately predicts the inter-ply failure process in composite materials, demonstrating high-fidelity and robustness in modeling the failure mechanisms of composite laminates, as validated by experimental results.
COMPOSITE STRUCTURES
(2021)
Article
Nanoscience & Nanotechnology
Ahmad Mirzaei, Peter D. Hodgson, Xiang Ma, Vanessa K. Peterson, Ehsan Farabi, Gregory S. Rohrer, Hossein Beladi
Summary: This study investigated the influence of parent austenite grain refinement on the intervariant boundary network in a lath martensitic steel. It found that refining the parent austenite grain led to a decrease in the fraction of certain boundaries in the martensite and an increase in the connectivity of low energy boundaries, ultimately improving the impact toughness.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
N. L. Church, C. E. P. Talbot, L. D. Connor, S. Michalik, N. G. Jones
Summary: Metastable beta Ti alloys based on the Ti-Nb system have attracted attention due to their unique properties. However, the unstable cyclic behavior of these alloys has hindered their widespread industrial use. Recent studies have shown that internal stresses, including those from dislocations, may be responsible for this behavior. This study demonstrates that inter-cycle thermal treatments can mitigate the unstable cyclic behavior, providing a significant breakthrough in our understanding of Ti-Nb superelastic materials.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Di Zhao, Chenchen Zhao, Ziyang Xiu, Jiuchun Yan
Summary: This study proposes a novel strategy for achieving the bonding of SiC ceramic and Al alloy using ultrasound. The ultrasound promotes the dissolution of Al into the solder, activating the solder and triggering the interfacial reaction between SiC ceramic and solder. With increasing ultrasonic duration, the bonding between SiC and Al transitions from partial to full metallurgical bonding.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Kang Du, Yang Zhang, Guangda Zhao, Tao Huang, Liyuan Liu, Junpeng Li, Xiyu Wang, Zhongwu Zhang
Summary: This paper systematically investigated the evolution of microstructure in Fe-Ni-Co-Al polycrystalline alloys and its effects on mechanical properties. The results revealed that the migration of grain boundaries in different processes is driven by different factors, which impacts the grain orientation and precipitate formation. In the process of directional recrystallization, grains with specific orientations grow in the grain boundary region and form the dominant orientation, while grains with lower migration rate form the minor orientation. The alloy produced through directional recrystallization exhibited good recoverable strain and superelastic strain, while the alloy produced through solid solution treatment showed no evident superelastic behavior.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Edohamen Awannegbe, Liang Chen, Yue Zhao, Zhijun Qiu, Huijun Li
Summary: This study employed laser metal deposition to additively manufacture Ti-15Mo wt% alloy, and subsequently subjected it to post-fabrication uniaxial thermomechanical processing. The results showed that different zones in the microstructure remained after processing, and deformation mechanisms mainly involved slip and martensite formation. The compressive mechanical properties were found to be dependent on strain rate, with higher flow stress and compressive strength observed at higher strain rates. Grain structure homogenisation was not achieved, leading to anisotropic tensile properties.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Reza Khatib Zadeh Davani, Enyinnaya George Ohaeri, Sandeep Yadav, Jerzy A. Szpunar, Jing Su, Michael Gaudet, Muhammad Rashid, Muhammad Arafin
Summary: This research aims to investigate the effect of roughing and finishing reductions on crystallographic texture. The results show significant heterogeneity in the centerline region, with higher intensity of certain textures. Drop Weight Tear Test indicates that steel specimens with lower and medium reductions exhibit superior low-temperature impact toughness compared to steel with higher reductions. The electrochemical hydrogen charging experiments confirm the presence of internal hydrogen cracks only in steel with lower and medium reductions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Flavio De Barbieri, Denis Jorge-Badiola, Rodrigo Allende, Karem Tello, Alfredo Artigas, Franco Perazzo, Henry Jami, Juan Perez Ipina
Summary: This study examines the effect of Cr additions on the mechanical behavior of TWIP steel at temperatures ranging from 25°C to 350°C. The results indicate that different temperature-dependent strengthening mechanisms, including mechanical twinning, Dynamic Strain Aging, and slip bands, are at play. The stacking fault energy (SFE) influences the percentage of mechanical twinning, which in turn affects the strain hardening rate.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Hanlin Peng, Siming Huang, Ling Hu, Bingbing Luo, Liejun Li, Ian Baker
Summary: This study explores the weldability, microstructures, and mechanical properties of two L1(2)-nanoparticle-strengthened medium-entropy alloys after electron beam welding (EBW). The results show that strong yet ductile defect-free joints were produced, with larger grain sizes in the fusion zones compared to the heat-affected zones and base materials. Both EBWed MEAs exhibited high yield strengths, high ultimate tensile strengths, and good fracture strains at 77 K. The V-doping improved the cryogenic mechanical properties of the TMT MEA.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yongxin Wang, Lei Chen, Lizi Shao, Shuo Hao, Motomichi Koyama, Xingzhou Cai, Xiaocong Ma, Miao Jin
Summary: This study investigated the tensile deformation behavior of an Mn-N bearing lean duplex stainless steel with metastable austenite. The results showed that the strain rate had significant influence on the work hardening, strain-induced martensitic transformation, and fracture mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Jong Woo Won, Seulbi Lee, Hye-Jeong Choe, Yong-Taek Hyun, Dong Won Lee, Jeong Hun Lee
Summary: Cold-rolled pure titanium showed improved sheet formability after undergoing cryogenic-deformation treatment. This treatment increased the thinning capability of the titanium and suppressed cracking during sheet forming. The formation of twins during deformation contributed to high thinning capability and increased strength through grain refinement and dislocation accumulation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Handong Li, Lin Su, Lijuan Wang, Yanbin Jiang, Jiahui Long, Gaoyong Lin, Zhu Xiao, Yanlin Jia, Zhou Li
Summary: Homogenization heat treatment is a key procedure in controlling the second phase, enhancing composition uniformity, and workability of as-cast Cu-15Ni-8Sn alloy. This study found that electropulsing treatment (EPT) can significantly reduce treatment temperature and time, improve elongation and overall mechanical properties of the alloy.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Yuxuan Wang, Juntao Zou, Lixing Sun, Yunfei Bai, Zhe Zhang, Junsheng Cheng, Lin Shi, Dazhuo Song, Yihui Jiang, Zhiwei Zhang
Summary: A novel mechanical-heat-electricity synergistic method was proposed to enhance the mechanical properties of Cu-15Sn-0.3Ti alloy by forming annealing twins (ATs). The combination method of Rotary swaging (RS) and Electric pulse treatment (EPT) successfully induced recrystallization and refinement of the microstructure, leading to a significant increase in the strength of the alloy within a short time.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Zhiyi Ding, Jiangtao Xie, Tong Wang, Aiying Chen, Bin Gan, Jinchao Song
Summary: This study demonstrated the Ta-induced strengthening of CoCrNi-AlTi MEAs using nanoscale heterogeneous coherent precipitates. The addition of Ta and aging treatments significantly enhanced the mechanical properties of the alloy, including yield strength, ultimate tensile strength, and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Z. Y. You, Z. Y. Tang, B. Wang, H. W. Zhang, P. Li, L. Zhao, F. B. Chu, H. Ding
Summary: The mechanical properties and microstructural evolution of C-doped TRIP-assisted HEA under dynamic loading conditions were systematically investigated in this study. The results showed that dynamic tensile deformation led to an increase in yield strength and a decrease in ultimate tensile strength, with a trend towards increased total elongation. The primary deformation mechanisms shifted from TRIP and TWIP effects to deformation twinning and dislocations. The presence of carbides formed through C-doping hindered dislocation slip and promoted the activation of multiple twinning systems.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)
Article
Nanoscience & Nanotechnology
Feng Qin, Feihu Chen, Junhua Hou, Wenjun Lu, Shaohua Chen, Jianjun Li
Summary: Plastic instability in strong multilayered composites is completely suppressed by architecting nanoscale BCC Nb crystalline-amorphous CuNb interfaces.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2024)