Article
Mechanics
Nilesh J. Vishe, Sameer B. Mulani, Samit Roy
Summary: This paper investigates the repeatable self-healing of composite laminates using a two-step mechanism to repair delamination cracks in CFRP composites. The process involves thermally activating dispersed SMP filaments to close cracked surfaces, and then melting and solidifying the thermoplastic healant dispersed in the thermoset polymer matrix to heal the closed crack. The results showed a substantial increase in fatigue life due to the retardation in delamination growth rate after seven healing cycles.
COMPOSITE STRUCTURES
(2023)
Article
Nanoscience & Nanotechnology
Xue Fu, Wenbo Du, Haixu Dou, Yong Fan, Jianing Xu, Limei Tian, Jie Zhao, Luquan Ren
Summary: The study introduced a nanofiber-supported anticorrosion coating with synergistic protection of self-healing and active corrosion inhibition. Utilizing an electrospinning combined coating technique, the coating offers instant corrosion protection and durable anticorrosion performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Biochemistry & Molecular Biology
Nan Sun, Zhaofeng Wang, Ying Xu, Jie Cong, Jia Li, Long Bai, Pengfei Huo, Zhiguo Li, Yang Liu
Summary: Inspired by the self-recoverability ability of organisms, a new polysiloxane-polyurea (PDMS-PU) was prepared and used as a matrix resin to develop cellulose nanofiber (CNF)/PDMS-PU composite materials with high mechanical properties. The CNFs increased the tensile strength of PDMS-PU by 38.87% while maintaining its bending resistance, transparency, and reprocessing properties. The introduction of CNFs did not reduce the self-healing efficiency of PDMS-PU, and the CNF/PDMS-IPDI-S-1% composite material exhibited a healing efficiency of 95.58% and retained a tensile strength of 92.55% after three recycling processes. These CNFs reinforced PDMS-PU composite materials have the potential to replace PDMS in advanced engineering fields that require high strength durability and good formability.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Construction & Building Technology
D. Grossegger
Summary: Fatigue damage is a main distress for asphalt roads, and self-healing can increase loading cycles, dependent on the healing time and duration. The contribution of crack closure to additional loading cycles varies in different damage stages, impacted by healing method and duration, with heterogeneity of asphalt introducing uncertainty into measurements.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2021)
Article
Mechanics
Bodiuzzaman Jony, Sameer B. Mulani, Samit Roy
Summary: The study presents the recovery of shear fracture toughness of damaged thermoset carbon fiber reinforced polymer composite using multiphase thermoplastic healing agents. Bio-mimetic heat-activated intrinsic healing and molten thermoplastic PCL healants were employed to repair micro or macro cracks, achieving recovery of fracture toughness in fractured specimens.
COMPOSITE STRUCTURES
(2022)
Article
Dentistry, Oral Surgery & Medicine
Ke Ning, Fang Yang, Ewald Bronkhorst, Jan Ruben, Liebert Nogueira, Havard Haugen, Bas Loomans, Sander Leeuwenburgh
Summary: This study investigated the fatigue behavior and aging process of self-healing composites containing microcapsules. The results showed that the self-healing composites exhibited improved fatigue resistance compared to the composites without microcapsules.
Article
Mechanics
Francisco Maciel Monticeli, Herman J. C. Voorwald, Maria Odila H. Cioffi
Summary: A mechanistic model for mode I fatigue delamination growth based on the hybrid fiber bridging zone is developed and described. The model incorporates microfracture mechanisms of striation, fiber peeloff, and fiber bridging stress, measured through scanning electron microscopy analysis. Moreover, it considers the effects of carbon and glass fiber delamination features at the microscopic level to predict the crack propagation behavior in a hybrid laminate. The experimental SERR based on the fiber bridging zone model is used as the similitude parameter for crack growth rate, following a power law.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Mechanical
Diego Erena, Jesus Vazquez, Carlos Navarro, Jaime Dominguez
Summary: In this article, a new fretting fatigue life prediction model is proposed, which automatically determines the crack direction based on the crack initiation length, and obtains excellent correlation between experimental and predicted results.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Reza Mohammadi, Roya Akrami, Maher Assaad, Mohamed Nasor, Ahmed Imran, Mohammad Fotouhi
Summary: This study investigated the fatigue properties of carbon fiber-reinforced polymer composite laminates and explored the effect of incorporating polysulfone nanofibers as an interleaving material. The results showed that adding polysulfone nanofibers significantly improved the fracture toughness and fatigue resistance of the composite laminates.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Chao Wang, Yanguang Sun, Zhengyang Ren
Summary: This paper presents a viscoelastic fatigue and fracture (VEFF) modeling and its preliminary application to asphalt binder under cyclic loading. Both traditional time sweep (TS) fatigue test and linear amplitude sweep (LAS) test are performed. The failure definition is unified from the peak of fracture energy. The binder fatigue performance is dominated by its resistance to crack propagation. A mechanistic criterion paradigm is established to be independent of the strain ramping rate in LAS and strain amplitude in TS tests. The proposed model is verified by various binders, demonstrating the reasonable use of the LAS as an accelerated fatigue protocol.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Biomedical
H. M. A. Kolken, A. Fontecha Garcia, A. Du Plessis, A. Meynen, C. Rans, L. Scheys, M. J. Mirzaali, A. A. Zadpoor
Summary: This study investigates the fatigue performance and crack formation mechanism of additively manufactured auxetic meta-biomaterials. Through full-field strain measurement and 3D imaging, the damage evolution during cyclic loading is revealed. Targeting the structural weak spots during the design and printing process is crucial for enhancing the performance of auxetic meta-biomaterials.
ACTA BIOMATERIALIA
(2022)
Article
Multidisciplinary Sciences
Tao Ni, Mirco Zaccariotto, Ugo Galvanetto
Summary: This article proposes a numerical tool based on bond-based peridynamics for simulating fatigue crack propagation in composite materials and structures. The proposed approach is validated through several benchmark cases and is capable of simulating static and fatigue crack propagations in composite systems with good characteristics.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Materials Science, Paper & Wood
Nan Sun, Zeyu Wang, Zhaofeng Wang, Dexing Jiang, Yaohui Dai, Xi Ma, Zhenyu Guo, Yun Chen, Lihao Sun, Wang Lu, Yang Liu
Summary: This research focuses on the preparation of self-healing materials with high mechanical strength using cellulose nanofiber and polyurea. The introduction of dynamic disulfide bonds improves both the self-healing and repeated processing performance.
Article
Engineering, Manufacturing
T. Khan, M. S. Irfan, W. J. Cantwell, R. Umer
Summary: Pre-cracked carbon fiber reinforced composite laminates were manufactured and repaired using the vacuum assisted resin transfer molding process. The effects of healing parameters on fracture toughness were investigated using a factorial design of experiments. The results showed that joining temperature had the most significant influence on fracture toughness, followed by contact time. Optimizing the processing parameters can enhance fracture toughness.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Mechanics
Yanfei Niu, Haoliang Huang, Jiangxiong Wei, Chujie Jiao, Qiangqiang Miao
Summary: The study investigates the fatigue crack propagation behavior in ultra-high-performance concrete (UHPC) containing different volume fractions of steel fibers under cyclic flexural loading. Different UHPC specimens exhibit varying critical crack lengths and propagation rates, with strain diagrams showing distinct patterns for crack growth. The research highlights the importance of reducing applied stress level and increasing steel fiber reinforcement to enhance fatigue life.
COMPOSITE STRUCTURES
(2022)