Article
Construction & Building Technology
Alireza Khaloo, Alireza Daneshyar, Benyamin Rezaei, Ali Fartash
Summary: The fracture process of fiber-reinforced concrete notched beams is investigated in this study. Polypropylene macrosynthetic fibers are used to reinforce the concrete specimens, and a high-strength mix design is applied. The results show that the sliding resistance of fiber-matrix interfaces is the predominant dissipative mechanism within the reinforced specimens, leading to ductile post-peak responses due to the high tensile strength of polypropylene fibers.
STRUCTURAL CONCRETE
(2022)
Review
Construction & Building Technology
Chaopeng Xie, Mingli Cao, Mehran Khan, Hong Yin, Junfeng Guan
Summary: The paper introduces theoretical models, testing methods, and influencing factors of fracture mechanics in FRCC, discusses reinforcement mechanisms for improving fracture properties, and lays a foundation for further research.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Manufacturing
Vishwas Divse, Deepak Marla, Suhas S. Joshi
Summary: This work develops a 3D progressive damage model to predict drilling-induced damage and its effect on the load-carrying capacity of fiber reinforced plastics laminates. The model is validated and applied to simulate drilling and its induced damage, showing good agreement with experimental data.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Review
Optics
J. Zhu, Z. Li, S. T. Yang, Y. R. Zhao, F. C. Lang, Y. M. Xing
Summary: In this study, the meso and nanoscopic deformation behavior of carbon-fiber reinforced resin matrix composites under tensile loading was investigated. In situ scanning electron microscopy combined with electron beam moire and geometric phase analysis techniques were used to measure and analyze the strain field distribution. A cross-grating with a pitch of 359 nm was fabricated on the surface of the composite material using electron beam lithography. The strain field distribution around different types of cracks and the ineffective length of broken fibers were characterized using geometric phase analysis.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Engineering, Mechanical
B. Vieille, J. -d. Pujols-Gonzalez, C. Bouvet
Summary: This study investigated the failure of quasi-isotropic fibers reinforced thermoplastic laminates solicited at different testing temperatures, and found that temperature significantly affects the mixed mode fracture toughness.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Polymer Science
Mohammad Amjadi, Ali Fatemi
Summary: This paper proposes a critical plane-based fatigue damage model for predicting tension-tension or tension-compression fatigue life of short glass fiber-reinforced thermoplastics, considering fiber orientation and mean stress effects. The model also includes temperature and frequency effects, and comparisons are made with experimental data to validate and analyze the model predictions.
Article
Engineering, Manufacturing
Jia Qiu, Yongcun Li, Feng Xu, Xiaofang Hu, Yu Xiao
Summary: Fiber-reinforced composites are lightweight materials with important applications in various fields. Understanding their internal deformation and failure mechanism is crucial in optimizing their microstructure and interfaces. This study used synchrotron X-ray computed tomography and digital volume correlation to investigate the three-dimensional deformation and failure evolution of a representative unit of fiber-reinforced resin composites. The results showed that deformation parameters have a significant impact on crack initiation and propagation.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Manufacturing
Constantin Nicolinco, Zia Mahboob, Yves Chemisky, Fodil Meraghni, Donatus Oguamanam, Habiba Bougherara
Summary: Compressive mechanical testing was performed on continuous fiber Flax/Epoxy laminate specimens to capture and quantify its evolving in-plane plasticity and moduli, and a modified continuum damage mechanics-based model successfully predicted the NFCs nonlinear compressive mechanical response.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Engineering, Mechanical
Kunpeng Li, Ting Yang, Wei Jiang, Kaiqiang Zhao, Kaibing Zhao, Xinyang Xu
Summary: In this work, a complex isotropic damage mechanics structural model is developed using the isogeometric method to study the strain displacement and influence factors. The proposed modeling method improves accuracy and eliminates mesh errors by introducing control points and weight coefficients dynamically. The isogeometric method has unparalleled advantages in describing irregular geometric models and seamlessly connecting the advantages of CAD and CAE.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Multidisciplinary
Zhongbin Tang, Chunyang Chen, Aijia Li, Yong Deng, Chao Zhang, Yulong Li
Summary: This study investigates the tensile failure behaviors of PEEK, short carbon, and glass-fiber-reinforced PEEK composites at different temperatures and strain rates. Quasi-static and dynamic tensile tests are conducted, and the fracture morphology is characterized by scanning electron microscopy. The results show that the tensile strength is highly influenced by temperature and strain rate. The failure strain of the composites is less sensitive to strain rate at -30 degrees C and 100 degrees C. Additionally, the energy absorptivity of PEEK composites decreases at extreme temperatures.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Mechanics
Amirreza Sadighi, Ebrahim Maghami, Mohammad Houshmand Khaneghahi, Divya Kamireddi, Seyed Ali Rahmaninezhad, Yaghoob (Amir) Farnam, Christopher M. Sales, Caroline L. Schauer, Ahmad R. Najafi
Summary: This paper conducts a numerical analysis to predict the fracture response of a novel type of fiber reinforced concrete blocks, called multi-functional fiber reinforced concretes (MFRCs). The study analyzes the effects of shell thickness and the ratio of fiber length to diameter on the fracture resistance of the MFRCs. Different loading conditions and material sets are considered, and the values of peak force and absorbed energy are used to compare the performance of each structure. The results show that the most favorable performance and configuration depend on the loading condition and material set, with the lowest fiber length to diameter ratio generally exhibiting the best mechanical response.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Construction & Building Technology
Moosa Mazloom, Sajjad Mirzamohammadi
Summary: The types of fibers and temperature have significant effects on the performance of fiber-reinforced cementitious composites, with PP fibers exhibiting the highest fracture energy at 20 degrees Celsius.
MAGAZINE OF CONCRETE RESEARCH
(2021)
Review
Construction & Building Technology
Peng Zhang, Cong Wang, Zhen Gao, Fei Wang
Summary: This paper provides a comprehensive review of the fracture properties of steel fiber reinforced concrete (SFRC). It emphasizes the most compelling and feasible fracture toughness and other strength enhancement methods using steel fiber (SF). The paper also reviews fracture models, evaluation parameters, and test methods used to study fracture properties of SFRC, as well as the effects of SF volume fraction and distribution on fracture properties.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Ahmed M. Maglad, Walid Mansour, Bassam A. Tayeh, Mohamed Elmasry, Ahmed M. Yosri, Sabry Fayed
Summary: Fracture parameters of fiber concrete are currently a hot research area, as fracture mechanics helps understand the type and propagation of cracks in materials. This research investigates the effect of steel fibers and recycled aggregate on the mechanical and fracture properties of concrete. Experimenting with 33 simply supported beams, the study finds that adding steel fibers significantly improves fracture characteristics while reducing brittleness.
INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS
(2023)
Article
Materials Science, Composites
Runmin Xu, Chen Wang, Kangkang Xu, Guanghui Liu, Hao Wang, Shiliu Zhu, Yuxia Chen, Yong Guo
Summary: Acoustic emission (AE) technology is a significant tool for analyzing the mechanical properties of wood-plastic composites (WPCs), allowing precise observation of their damage evolution and fracture process. It provides important technical support for the emerging WPC industry.
POLYMER COMPOSITES
(2023)
Article
Engineering, Civil
Zhonggang Wang, Junjie Deng, Kai Liu, Yong Tao
Summary: This study proposes a hybrid hierarchical square honeycomb (HHSH) and investigates its effective in-plane elastic modulus through theoretical and numerical methods. The results show that HHSH has the ability to tailor the elastic modulus, which is mainly attributed to the structural parameters introduced by both the edge-based and vertex-based hierarchy.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Ke Yuan, Kai Liu, Minquan Zhao, Kai Wei, Zhonggang Wang
Summary: The in situ effect on cross-ply laminates under out-of-plane shear loading is studied using a two-dimensional RVE-based computational micromechanics method. High fidelity simulations of interface debonding and crack propagation in laminates show good consistency with experimental observation. Thinner ply laminates demonstrate higher shear strength and stronger damage resistance due to the delay effect of transverse cracking and delamination. The findings provide insights into the failure mechanism and optimization design of multi-layer composites.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Xinxin Wang, Tianyu Gao, Chong Shi, Yin Zhou, Zhendong Li, Zhonggang Wang
Summary: This study experimentally investigates the mechanical behaviors of 3D-printed polymeric TPMS sheets. The results show that the P-W Hybrid structure exhibits good energy absorption and load bearing capacity, while the Schoen I-WP structure experiences a good collapse pattern. The structures are ranked in a comprehensive manner, with P-W Hybrid being the best.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Tianyu Gao, Kai Liu, Xinxin Wang, Zhendong Li, Zhonggang Wang
Summary: This study proposes a periodic hybrid method for constructing functional mechanical metamaterials, which expands the designable range of elastic modulus by hybridizing TPMS. The elastic properties of the hybridizations can be quantificationally tailored by adjusting the formal parameters of TPMS.
MATERIALS & DESIGN
(2022)
Article
Engineering, Manufacturing
Zhonggang Wang, Zichao Guo, Zhendong Li, Kexin Zeng
Summary: This paper proposes a hierarchical metamaterial that can absorb both sound and mechanical energy by modulating its structural features. The material has an increasing absorption bandwidth and can absorb energy at different frequencies. The unique resonant responses of the material are demonstrated through analysis and experiments, and the enhancement mechanism is revealed. Compared to the original material, the hierarchical metamaterial shows significantly improved specific energy absorption.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Engineering, Mechanical
Kexin Zeng, Zhendong Li, Zichao Guo, Xifeng Liang, Zhonggang Wang
Summary: This study introduces a novel acoustic metamaterial for high-efficiency low-frequency broadband sound absorption, achieved by utilizing phase shift tubes and spider-web-like structures to modulate acoustic impedance and expand effective working frequency.
EXTREME MECHANICS LETTERS
(2022)
Article
Engineering, Mechanical
Ke Yuan, Lumin Shen, Wei Xiong, Shaocheng Yao, Jiajie He, Zhonggang Wang
Summary: This study investigates the medium velocity impact response and post-impact flexural behavior of hybrid sandwich structures. The experimental results show that the CFRP face sheets play a dominant role in the impact resistance of sandwiches.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Manufacturing
Zhendong Li, Xinwei Li, Jun Wei Chua, Chong Heng Lim, Xiang Yu, Zhonggang Wang, Wei Zhai
Summary: This study proposes a novel multifunctional microlattice metamaterial based on a hollow truss-plate hybrid design, which is realized by digital light processing 3D printing. Experimental results show that this material exhibits excellent sound absorption and mechanical properties, achieving quasi-perfect sound absorption and broadband half-absorption. The sound-absorbing capacity relies on the designed cascaded Helmholtz-like resonators, and the physical mechanisms behind the absorptive behaviors are revealed through numerical analyses. Additionally, this material displays superior modulus and strength compared to conventional cellular materials and modified microlattices, attributed to the near-membrane stress state of the plate architecture and the mechanically robust behavior of the hollow struts. This work presents an effective approach for designing and engineering multifunctional metamaterials through 3D printing.
VIRTUAL AND PHYSICAL PROTOTYPING
(2023)
Article
Materials Science, Multidisciplinary
Abdullahi Ahmad Adedeji, Junjie Deng, Chong Shi, Lumin Shen, Yuwen Zhu, Zhonggang Wang
Summary: This study investigates the interaction between hierarchical geometries and crashworthiness improvement, and identifies the optimal honeycomb configuration. Nine distinct second-order vertex-based hierarchical honeycombs are constructed by replacing the vertices of a square-based honeycomb. Finite element models are established to analyze the crashworthiness performance. The study shows that the second-order hierarchical honeycomb has superior crashworthiness compared to regular and first-order hierarchical honeycombs, and determines that the circle is a suitable matching geometry in improving the crashworthiness of a square-based honeycomb. The Square-Circle-Circle structure is ranked as the optimum for crashworthiness application using Complex Proportional Assessment.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Engineering, Mechanical
Kai Liu, Pei Li, Zhonggang Wang
Summary: This paper proposes a buckling-regulated origami material by synergy design, which incorporates three buckling-regulated mechanisms to control global buckling, local buckling, and high energy-absorbing deformation. The manufactured origami materials show anticipated properties, and it may inspire new innovations in designing other multi-functional metamaterials.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Chemistry, Physical
Shuo Yang, Qidong Yang, Zhaoliang Qu, Kai Wei
Summary: This study investigates the influence of manufacturing defects on the mechanical behavior of LPBFed Invar 36 alloy fabricated at different scanning speeds. The presence of different defects leads to differences in plastic deformation and brittle failure behavior of the alloy.
Article
Engineering, Multidisciplinary
Kai Liu, Lu Meng, Ang Zhao, Zhonggang Wang, Leilei Chen, Pei Li
Summary: A hybrid Direct FE2 method is proposed to deal with strain localization, which models the low deformation gradient region using the D-FE2 method and the high deformation gradient region using the traditional FE method. Node displacement constraints are imposed at the interface between the two models to enforce energy equilibrium and deformation continuity. The method successfully predicts the strain localization behavior of multiscale materials or structures and demonstrates accuracy, efficiency, and ease of implementation.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Xinxin Wang, Zhendong Li, Xinwei Li, Kai Wei, Zhonggang Wang
Summary: This study presents a new design strategy to achieve customizable stress plateau by introducing selfsimilar structure in an FCC lattice. Experimental and numerical results demonstrate that embedded sub-structures can enhance the mechanical properties of the lattice, and different hierarchical levels of FCCH structures experience different plateau characteristics. The geometric configuration also plays an important role in customizing the stress plateau.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Composites
Tianyu Gao, Kai Liu, Xinxin Wang, Lumin Shen, Yiming Zhao, Kai Wei, Zhonggang Wang
Summary: In this study, a smooth-transition hybrid TPMS with multi-functional characteristics is designed to improve the performance of conventional hybrid materials in shock absorption and noise reduction. The smooth hybrid intervals provide desirable transmission and reflection of stress wave conforming to the impedance characteristics of each component. Furthermore, the air domains in TPMS structure expand the high-frequency acoustic isolation properties. The mechanics-acoustics coupling property of proposed hybrid TPMS may have significant implications for the development of novel shock absorption and noise reduction materials.
COMPOSITES COMMUNICATIONS
(2023)
Article
Mechanics
Xiaolong Liu, Kelian Luo, Pengcheng Gao, Tao Cong, Xi Wang, Wenjing Wang
Summary: This paper investigates the formation mechanisms of the zig-zag crack region on the shattered rim of railway wheels. The zig-zag crack region, identified as a typical region for crack propagation in rolling contact fatigue behavior, was observed using scanning electron microscopy and transmission electron microscopy. The formation of the zig-zag morphology is attributed to the periodic deflection of the propagation path relative to the initial propagation plane, caused by the limited plastic deformation zone at the crack tip. Grain refinement and secondary cracks in the zig-zag crack region are a result of the large compressive and shear stresses induced by rolling contact loading.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Anastasia Iziumova, Aleksei Vshivkov, Ivan Panteleev, Virginia Mubassarova, Oleg Plekhov, Denis Davydov
Summary: The aim of this study was to investigate the correlation between structural, acoustic emission, and thermal characteristics of fatigue crack growth in titanium alloys. Cluster analysis of the acoustic emission signals revealed two different types of signals observed during the fatigue crack development. It was experimentally demonstrated that the stored energy tends to reach an asymptotic value at the final stage of fatigue crack growth and this is correlated with the twinning process intensification in titanium alloy Ti Grade 2. A correlation was assumed between the stages of change in heat flux, the cumulative energy of the first cluster of acoustic emission signals, and the crack length.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
M. Vieira de Carvalho, I. A. Rodrigues Lopes, F. M. Andrade Pires
Summary: This study investigates the numerical challenges of fracture mechanics models within implicit quasi-static frameworks and proposes an instability criterion. The ratio of cohesive to internal power is identified as a crucial factor. Two strategies for handling fracture problems with instabilities are discussed and a comparative assessment is performed. The study also examines more complex material responses, including transformation-induced plasticity effects.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Thomas Duminy, Aurelien Doitrand, Sylvain Meille
Summary: This study conducted in situ wedge splitting tests on millimeter-size PMMA samples and proposed a method to determine the material tensile strength and critical energy release rate using digital image correlation and a full finite element implementation of the coupled criterion.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Xin Chang, Xingyi Wang, Chunhe Yang, Yintong Guo, Yanghui Wan
Summary: The influence of cyclic thermal shock and high-temperature acid etching on the Mode I fracture of shale was investigated in this study. It was found that cyclic thermal shock severely degrades the strength and fracture toughness of shale, while high-temperature acid etching treatment improves the fracture toughness. These findings are valuable for optimizing process parameters to reduce initiation pressure in deep shale formations.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Liaojun Yao, Mingyue Chuai, Zhangming Lyu, Xiangming Chen, Licheng Guo, R. C. Alderliesten
Summary: Methods based on fracture mechanics have been widely used in fatigue delamination growth (FDG) characterization of composite laminates. This study proposes appropriate similitude parameters to represent FDG behavior with different R-ratios.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Zesheng Zang, Zhonghui Li, Yue Niu, Shan Yin
Summary: This study conducted experiments and recorded signals to investigate the fracture behavior and damage evolution characteristics of coal samples. The results showed that as loading proceeds, the stress, electric potential (EP), and acoustic emission (AE) values increase, and EP and AE signals are excited when stress drops. The fracture behavior of coal samples is altered by flaw inclination, and the destruction mode becomes increasingly complicated. The damage evolution characteristics of coal samples can be evaluated and analyzed by defining the coefficient of variation (CV value) of EP and the b value of AE.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Clotilde Berdin, Nathalie Prud'homme
Summary: In this study, zirconia layers with different fractions of tetragonal phase and thicknesses were tested for multi-cracking behavior. Cracks perpendicular to the tensile direction were observed, showing a blunting effect into the substrate. The ratio of crack spacing at saturation to layer thickness decreased as the layer thickness increased. Unit cell modeling was used to establish a relationship between crack spacing and layer strength, which fell within the bounds of Hu and Evans model and was found to be insensitive to the tetragonal zirconia fraction.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Huadong Zhang, Weichen Kong, Y. H. Liu, Yuh J. Chao
Summary: Williams' series expansion crack tip solution in linear elasticity is modified to include a uniform crack face pressure. Practical methods to calculate T-stress from near crack tip stresses are outlined. The analytical results are consistent with numerical results.
ENGINEERING FRACTURE MECHANICS
(2024)
Article
Mechanics
Jiahao Kong, Haoyue Han, Tao Wang, Guangyan Huang, Zhuo Zhuang
Summary: This paper introduces a phase-field model for polymer foam materials by combining the phase-field method with the crushable foam model. The model is calibrated using experimental data and successfully simulates the fracture processes of polyurethane under different loading conditions. The study is important for the engineering applications of polymer foam materials.
ENGINEERING FRACTURE MECHANICS
(2024)
