Article
Mechanics
Klajdi Toska, Flora Faleschini
Summary: This study analyzed the experimental behavior of confined concrete specimens subjected to axial cyclic load, revealing that the stress-strain curves obtained with cyclic loading coincide with the monotonic curve. The stress-strain curve of FRCM-confined concrete has been modeled according to three different behaviors exhibited in this experimental campaign, including purely softening, softening with plateau, and hardening.
COMPOSITE STRUCTURES
(2021)
Article
Construction & Building Technology
Jifeng Jia, Xiaoling Yu, Xinyue Zhang, Qian Lv, Junchao Ye
Summary: This paper presents a method to detect the axial stress of bolt body using strain gauges. The linear relationship between the axial stress of bolt body and the surface axial stress of nut is verified through experimental investigations. This method provides a new way to monitor bolt loosening.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Review
Dentistry, Oral Surgery & Medicine
Guilherme Almeida Borges, Denise Juncom Codello, Leticia Del Rio Silva, Caroline Dini, Valentim Adelino Ricardo Barao, Marcelo Ferraz Mesquita
Summary: Mini-implants may serve as an alternative choice due to fewer prosthetic complications and maintenance events compared to standard implants, while showing comparable clinical outcomes.
JOURNAL OF PROSTHETIC DENTISTRY
(2023)
Article
Chemistry, Multidisciplinary
Wenyu Zhao, Zhuofan Lin, Zongtao Sun, Zhihao Zhu, Waner Lin, Yingtian Xu, Zhengchun Peng, Zhenglong Sun, Ziya Wang
Summary: This paper proposes a strategy to modulate the ion transport behavior of ionic hydrogel-based strain sensors (IHSS) by geometry-induced strain concentration to adjust and improve their sensitivity. The gauge factor of the IHSS is continuously tunable from 1.31 to 9.21 in the strain range of 0-100%, breaking through the theoretical limit of homogeneous strain-distributed ionic hydrogels and ensuring a linear electromechanical response simultaneously.
Article
Chemistry, Physical
Guilherme da Rocha Scalzer Lopes, Jefferson David Melo de Matos, Daher Antonio Queiroz, Joao Paulo Mendes Tribst, Nathalia de Carvalho Ramos, Mateus Garcia Rocha, Adriano Baldotto Barbosa, Marco Antonio Bottino, Alexandre Luiz Souto Borges, Renato Sussumu Nishioka
Summary: This study evaluated the biomechanical behavior of Morse taper implants using different abutments for supporting a screw-retained 3-unit fixed partial denture. The results showed that under favorable conditions, the use of CMN or MP abutments to support a fixed partial denture is feasible.
Article
Polymer Science
Ciprian Ionut Moraras, Viorel Goanta, Dorin Husaru, Bogdan Istrate, Paul Doru Barsanescu, Corneliu Munteanu
Summary: In this study, sandwich-reinforced GFRP materials were tested in three directions to determine the parameters of the stress-strain curve and establish the three-dimensional elasticity. Strain gauge sensors were used to establish the material's three-dimensional elasticity, and SEM images were taken to highlight the fracture characteristics. The stress-strain directions were determined through finite element analysis, and the operational capability of wind turbine blades was determined based on the various reinforcements and three orientations.
Article
Engineering, Civil
Fuzheng Sun, Neil A. Hoult, Liam J. Butler, Merrina Zhang
Summary: Distributed fiber optic sensors were used for the first time to monitor lateral buckling of a rail under axial loading with different boundary conditions. Two types of DFOS systems were compared for their performance, and a data extrapolation method was developed to evaluate actual boundary conditions. Rail deflection along the length of rail was calculated by integrating distributed curvature data and compared with deflection measured by linear potentiometers.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2022)
Article
Engineering, Geological
M. Cai, P. Y. Hou, X. W. Zhang, X. T. Feng
Summary: Stiffman is a super stiff rock mechanics testing machine that overcomes technical difficulties of conventional machines by using composite loading frames and relay loading with two hydraulic actuators. It provides a reliable platform for studying the post-peak deformation behaviors of brittle hard rocks under axial-strain-controlled loading.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2021)
Article
Dentistry, Oral Surgery & Medicine
Adam Hamilton, Faris Z. Jamjoom, Muhsen Alnasser, Jacqueline R. Starr, Bernard Friedland, German O. Gallucci
Summary: This study confirmed that angulating 12 mm implants provides a limited increase in A-P distribution of implants in edentulous rehabilitation in most situations. In certain patients, the use of 8 mm axial implants may provide a greater A-P spread.
CLINICAL ORAL IMPLANTS RESEARCH
(2021)
Article
Engineering, Geological
Pingxin Xia, Chao Zeng, Longtan Shao, Xiong Zhang
Summary: This study proposed a new approach to formulate an empirical model of strain accumulation by linking the reloading process in cyclic loading with the monotonic loading process. The evolution of strain accumulation was described by the projection modulus and an empirical formulation for describing the connection between projection modulus and stress levels was proposed. The prediction model of total axial strain in cyclic loading was presented by combining the accurate representation of elastic and plastic moduli during primary loading, enhancing the understanding of strain accumulation mechanism.
SOIL DYNAMICS AND EARTHQUAKE ENGINEERING
(2021)
Article
Construction & Building Technology
Klajdi Toska, Flora Faleschini, Mariano Angelo Zanini
Summary: This paper investigates various aspects that affect the effectiveness of Fiber Reinforced Cementitious Matrix (FRCM) jackets as confining systems, including overlapping length, equivalent fiber thickness, fibers coating presence, and reinforcement configuration. An experimental campaign was conducted on cylindrical specimens with carbon-based FRCM (CFRCM) jackets to analyze failure modes, stress-strain behavior, strength and stiffness deterioration, and plastic strains. The results show that the investigated parameters have a significant impact on the effectiveness of the confining jackets, with the best results observed when carbon fibers are epoxy-coated. New relationships for predicting cyclic behavior of confined concrete are proposed and compared with existing literature on other confining systems.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Mechanics
Dragan Kovacevic, Frans P. van der Meer
Summary: In this paper, a micromechanical framework for modeling the rate-dependent response of unidirectional composites subjected to off-axis loading is introduced. The model not only considers the rate dependency and finite strains of the material, but also includes the geometric nonlinear effect during the deformation process.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Engineering, Civil
Shovona Khusru, David P. Thambiratnam, Mohamed Elchalakani, Sabrina Fawzia
Summary: The study explores the use of scrap tyre rubber in concrete as a sustainable solution, proposing a hybrid double-skin tubular column to address the reduced strength of rubberised concrete. Experimental investigation shows that the proposed column effectively increases compressive strength and ductility, providing a sustainable solution for seismic-prone regions and mining infrastructure.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Gao Ma, Cheng Wu, Hyeon-Jong Hwang, Jiulin Bai, Zhihu Zeng
Summary: This study investigated the monotonid and repeated axial compressive behavior of damaged concrete prisms repaired by basalt fiber-reinforced polymer (BFRP). The results showed that the compressive strength and axial deformation capacities of the repaired prismatic specimens were improved after repairing. However, the initial elastic modulus and strength at the turning and ultimate states decreased with the increase of initial damage in the BFRP-repaired specimens. Based on the test results, a monotonic stress-strain relationship and a modified repeated compressive stress-strain model were proposed for BFRP-repaired concrete prisms.
ENGINEERING STRUCTURES
(2022)
Article
Mechanics
Dragan Kovacevic, Bharath K. Sundararajan, Frans P. van der Meer
Summary: In this paper, a finite deformation micromechanical framework is developed for modeling rate-dependent failure in unidirectional composites under off-axis loading. The model takes into account microcrack initiation based on local stress and deformation state, as well as the inclusion of geometric nonlinearity and viscoplasticity. The change in microstructure orientation during loading is found to have an important implication on the material strength.
ENGINEERING FRACTURE MECHANICS
(2022)
