Article
Mechanics
Pawel Stabla, Marek Lubecki, Michal Smolnicki
Summary: This paper investigates the two key parameters of the filament winding technology process using both experimental and numerical approaches, and reveals the significant influence of the mosaic pattern on the performance.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
E. Kormanikova, K. Kotrasova
Summary: This article explores the method of using micro-macro modeling for seismic response calculation in a composite rectangular tank filled with liquid.
COMPOSITE STRUCTURES
(2022)
Article
Chemistry, Physical
Jozef Horabik, Maciej Banda, Grzegorz Jozefaciuk, Agnieszka Adamczuk, Cezary Polakowski, Mateusz Stasiak, Piotr Parafiniuk, Joanna Wiacek, Rafal Kobylka, Marek Molenda
Summary: Wood pellets are important for renewable energy, with oak pellets having the highest tensile strength and birch pellets the lowest. The highest tensile strength was observed for all materials at a moisture content of 8% and 120 MPa. All pellets exhibited ductile breakage mode, and simulations successfully reproduced laboratory results.
Article
Pharmacology & Pharmacy
Vincent Mazel, Jeremie Girardot, Jean-Benoit Kopp, Stephane Morel, Pierre Tchoreloff
Summary: The mechanical strength of pharmaceutical tablets is crucial and can be tested using different failure tests. However, these tests often yield conflicting values of tensile strengths (TS) due to the inappropriate application of the maximum stress criterion. This study proposes an alternative approach using a numerical fracture criterion (CZM) that is suitable for quasi-brittle solids. The numerical results show good agreement with experimental data and enable comparisons between different failure tests. Notably, the model explains the factor of 2 difference in TS obtained by three-point bending and diametral compression tests observed in literature.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Materials Science, Composites
Haibo Luo, Qian Wang, Yanchu Yang, Xiaohui He, Hui Feng, Ying Nie, Tao Li
Summary: This study investigates the tensile and compression properties of 3D5D braided composite circular tubes with preembedded titanium alloy licker-ins. The influence of braided angle, thickness, and configuration on the bearing capacity is analyzed, and the microdamage morphology and failure mechanism of the tube structure are examined. The findings provide important scientific basis for the lightweight and high-strength connection design for 3D braided composites in near-space aerostats.
POLYMER COMPOSITES
(2023)
Article
Construction & Building Technology
Yu Xia, Chu Ding, Zhanjie Li, Benjamin W. Schafer, Hannah B. Blum
Summary: AHSS has higher strength and potential application in cold-formed steel construction, but requires a deep understanding and quantification of material properties, along with a novel proof stress proposed to represent the yield strength of AHSS.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Engineering, Manufacturing
Drew E. Sommer, D. Thomson, O. Falco, G. Quino, H. Cui, N. Petrinic
Summary: This study investigates the impact response of angle-ply carbon fibre reinforced polymer (CFRP) crush tubes using experimental testing and numerical simulations. The results show that interlaminar friction between delaminated plies plays a significant role in energy dissipation.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2022)
Article
Engineering, Mechanical
Zichen Zhang, Nannan Liu, Zan Zhang, Xingchuan Xia, Zeng Wang, Jian Ding, Jiacheng Wang, Yongchang Liu
Summary: In this study, composite aluminum foam tubes (CAFTs) with different porosities and diameter ratios were made by a melt foaming method. X-ray tomography was used to create 3D models based on real specimens. The mechanical behavior and failure mechanism of CAFTs were investigated through compression tests and finite element simulation. The effect of porosity and diameter ratio on energy absorption capacity was also analyzed. The results showed that CAFTs exhibited more stable and controllable deformation compared to thin-walled tubes. Moreover, the specific energy absorption increased with higher diameter ratios. The deformation of CAFTs started from the foam core and interface bonding played a crucial role in the process.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Huan Sheng Lai, Rongcheng Wang, Yuntao Zhong, Peinan Du, Jinquan Guo, Qifei Huang
Summary: A small punch testing (SPT) method was established to investigate the circumferential tensile behavior of nuclear fuel cladding tubes. The proposed method accurately determined the yield stress and ultimate tensile stress of the tubes.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Construction & Building Technology
Huiyong Ban, Guohao Zhou, Haiqun Yu, Yongjiu Shi, Kun Liu
Summary: The study aims to investigate mechanical properties of a superior high-performance steel at elevated temperatures and propose constitutive models for its further usage in fire design and structural member analyses. Comprehensive experimental programs were conducted, obtaining key mechanical properties of the SHP steel and comparing them with prediction results in national standards and literature. Specific prediction equations and an adapted Ramberg-Osgood model were proposed for evaluating temperature-dependent mechanical properties and describing full range stress-strain relation of the SHP steel.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2021)
Article
Construction & Building Technology
Chuntao Zhang, Yu Chen, Mei Dou
Summary: In this study, axial compression tests were conducted on slender BFRP tubes to evaluate their compression characteristics as compression members. The results indicated that BFRP tubes exhibited three distinct failure modes, namely local failure, critical failure, and buckling failure. Two three-stage theoretical models for BFRP tubes were developed through experimental data analysis, which successfully predicted the stress-strain curves and the load-lateral deflection curves.
Article
Construction & Building Technology
Yang Wei, Si Chen, Shuaifeng Tang, Kaiqi Zheng, Jiaqing Wang
Summary: This study proposes a novel bamboo composite tube and investigates the failure modes and bearing capacities of the tube under different parameters. The results indicate that the bamboo composite tube has the potential to be used as column components, and a calculation method for predicting its bearing capacity is established.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Lajos Feher, Damian Mrowczynski, Renata Pidl, Peter Borocz
Summary: This study aims to create and validate a numerical model to predict the compression force of corrugated cardboard boxes by considering the influence of different cutout configurations of sidewalls. The results show that the numerical model can give a good prediction for the BCT force values from 0% cutout to 64% cutout rates.
Article
Engineering, Civil
Tao Liu, Xianyan Wu, Baozhong Sun, Wei Fan, Wanli Han, Honglei Yi
Summary: This paper numerically investigated the impacts of manufacturing defects and braiding angles on the impact compressive properties of 3D carbon fiber/epoxy resin braided composite tubes. The results show that random defects have a negative influence on the compressive failure mechanisms of the braided tubes, and non-ideal models containing appropriate random defects are more accurate in simulating the dynamic compressive failure evolution process.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Xiaomeng Zhang, Xueyong Zhang, Wenting Liu, Zheng Li, Xiaowei Zhang, Yilun Zhou
Summary: A new type of composite insulated concrete sandwich wall, consisting of a triangle truss steel wire network, an insulating layer, and internal and external concrete layers, was studied for mechanical properties. Findings showed that the tensile strength and bearing capacity of the wall can be effectively improved by strengthening the triangle truss connection and shortening the vertical distances of the triangle truss.
ADVANCES IN CONCRETE CONSTRUCTION
(2021)
Article
Engineering, Civil
Abass Braimah, Farouk Siba
CANADIAN JOURNAL OF CIVIL ENGINEERING
(2018)
Article
Mechanics
Maha Hussein Abdallah, Hamdy M. Mohamed, Radhouane Masmoudi, Ahmed Moussa
COMPOSITE STRUCTURES
(2018)
Article
Construction & Building Technology
Maha Hussein Abdallah, Hamdy M. Mohamed, Radhouane Masmoudi
CONSTRUCTION AND BUILDING MATERIALS
(2018)
Article
Engineering, Civil
Maha Hussein Abdallah, Hamdy M. Mohamed, Radhouane Masmoudi, Ahmed Moussa
ENGINEERING STRUCTURES
(2018)
Article
Engineering, Civil
Lenda T. Ahmed, Abass Braimah
ENGINEERING STRUCTURES
(2019)
Article
Construction & Building Technology
Alok Dua, Manish Kumar, Abass Braimah
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-STRUCTURES AND BUILDINGS
(2020)
Article
Engineering, Civil
Alok Dua, Abass Braimah, Manish Kumar
ENGINEERING STRUCTURES
(2020)
Article
Construction & Building Technology
Alok Dua, Abass Braimah
JOURNAL OF PERFORMANCE OF CONSTRUCTED FACILITIES
(2020)
Article
Engineering, Civil
Lenda T. Ahmed, Abass Braimah
Summary: Finite element analysis was conducted to study the shear behavior of post-installed adhesive anchors at different strain rates, showing that the shear capacity and dynamic increase factor increased with higher strain rates. Factors such as anchor diameter and embedment depth also influenced the shear capacity, with the failure mode transitioning from pryout failure to concrete spalling and steel anchor fracture as the strain rate increased from 10^(-5) s^(-1) to 10^3 s^(-1).
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Aliu Abdul-Hamid, Abass Braimah, Fred Tai
Summary: The study found that the Titen HD(R) mechanical screw anchors have higher capacities under impulse-type loading conditions, with different dynamic increase factors recommended for anchors of different diameters to improve safety.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Alok Dua, Abass Braimah, Manish Kumar
Summary: Threats of terrorist attacks using large amounts of explosives are less likely due to the difficulty of acquiring them without alerting security agencies. However, detonating small concealed explosives in contact with critical load-bearing structural members to compromise the structure's stability is a plausible threat tactic. This paper investigates the response of reinforced concrete (RC) columns subjected to blast loads from a small standoff distance, and examines the effects of various design parameters on the behavior of columns under blast loading.
JOURNAL OF STRUCTURAL ENGINEERING
(2022)
Article
Engineering, Civil
Isaac Kwaffo, Maha Hussein Abdallah, Abass Braimah
Summary: The Oklahoma City Bombing and the events of September 11, 2001 led to research into the response of infrastructure to explosion effects and the risk of building structures collapsing. This paper presents the results of an experimental program that investigates the residual capacity of blast-damaged columns in the laboratory. The findings show that columns with reduced tie spacing have higher post-blast residual capacity.
Article
Engineering, Geological
George Afriyie, Abass Braimah, Mohammad T. Rayhani
INTERNATIONAL JOURNAL OF GEOTECHNICAL ENGINEERING
(2018)
Article
Mechanics
Rawan Aqel, Patrick Severson, Rani Elhajjar
Summary: A novel core splice joint configuration for composite sandwich structures is studied and proposed to improve the strength and toughness. Experimental and numerical efforts show that this configuration can significantly increase the ultimate strength by 13% to 51% and the toughness by 2% to 35%.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xianheng Wang, Cong Chen, Jinsong Zhang, Xinming Qiu
Summary: In this paper, a new form-finding method based on spatial elastica model (FMSE) is proposed for elastic gridshells. The method integrates the deformations of elastic rods into the overall deformation of the gridshell, and solves a set of transcendental equations using the quasi-Newton method to ensure the deformation satisfies the given boundary conditions. The method is validated through experiments and expected to have potential applications in the investigations of elastic gridshells.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Hao Huang, Zitong Guo, Zhongde Shan, Zheng Sun, Jianhua Liu, Dong Wang, Wang Wang, Jiale Liu, Chenchen Tan
Summary: The conventional evaluation of 3D braided composites' mechanical properties through numerical and experimental methodologies hinders material application due to the expenses, time constraints, and laborious efforts involved. This study establishes a multi-scale finite element model and a surrogate model for predicting the elastic properties of 3D4D rotary braided composites with voids. By optimizing a neural network model, the results are validated and provide valuable insights into the microstructure and properties of these composites.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Xinyu Li, Hao Zhang, Haiyang Yang, Junrong Luo, Zhongmin Xiao, Hongshuai Lei
Summary: Due to their excellent mechanical properties and design flexibility, fluted-core composite sandwich structures have gained significant attention in aerospace and rail transit applications. This study investigated the free-vibration characteristics and optimized design of composite fluted-core sandwich cylinders through theoretical models and experimental tests.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Chao Li, Chunzheng Duan, Xiaodong Tian, Chao Wang
Summary: A mechanistic model considering the bottom edge cutting effect and the anisotropic characteristics of the material is proposed in this paper to accurately predict cutting forces. The model was validated through a series of milling experiments and can be used to predict the cutting force of various parts of the cutter and any feed direction.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Camila Sanches Schimidt, Leopoldo Pisanelli Rodrigues de Oliveira, Carlos De Marqui Jr
Summary: This work investigates the vibro-acoustic performance of graded piezoelectric metamaterial plates. The study shows that piezoelectric metamaterial plates with reconfigurable properties can provide enhanced vibration and sound power attenuation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jun Ke, Li-jie Liu, Zhen-yu Wu, Zhong-ping Le, Luo Bao, Dong-wei Luo
Summary: Compared with other green natural fibers, ramie has higher mechanical properties and lower cost. In this study, ramie and glass fiber are made into composite circular tubes. The results show that the hybrid circular tube with ramie and glass fiber has improved torsional mechanical properties and reduced weight and cost. The failure mechanisms are affected by the loading direction and the content of each fiber.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Natalia Pingaro, Gabriele Milani
Summary: This paper proposes an enhanced analytical model for predicting the behavior of FRCM samples tested under standard tensile tests. The model takes into account the interaction between fibers and matrix through the interface, and assumes different material properties at different phases. By solving a second order linear differential equation, an analytical solution can be obtained. The model is validated with experimental data and shows good predictability.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Jialiang Fan, Anastasios P. Vassilopoulos, Veronique Michaud
Summary: This article investigates the effects of voids, joint geometry, and test conditions on the fracture performance of thick adhesive Double Cantilever Beam (DCB) joints. It concludes that grooved DCB joints with low void content tested at low displacement rates showed stable crack propagation without significant crack path deviation.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Auwalu I. Mohammed, Kaarthikeyan Raghupathy, Osvaldo De Victoria Garcia Baltazar, Lawson Onokpasah, Roger Carvalho, Anders Mogensen, Farzaneh Hassani, James Njuguna
Summary: This study investigates the performance of composite pressure vessels under damaged and undamaged conditions, providing insights into their reliability and residual strength capabilities. The results demonstrate that the damage profile and its effect on compressive strength are similar between damaged and non-damaged cylinders. When subjected to quasi-static compression, the polyethylene liner absorbs enough elastic strain energy to recover without plastic deformation. Additionally, quasi-static compression has little to no influence on the axial strength of the cylinders. The damage characterization reveals fiber breakage, delamination, local buckling, and brooming failure. This study has direct implications for the safety design tolerances, manufacturing strategies, and operational failure conditions of composite overwrapped pressure vessels (COPVs).
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Muhammad Irfan Shirazi, Samir Khatir, Djilali Boutchicha, Magd Abdel Wahab
Summary: Structural health monitoring is important to ensure the safety of components and structures. This study proposes a method using finite element models and 1D-CNN network to extract and classify vibration responses for crack detection. The results show that the proposed approach is effective in real-time damage detection.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Maryam Mirsalehi, Kiarash Kianpour, Sharif Shahbeyk, Mohammad Bakhshi
Summary: This study comprehensively investigates the one-way response of 3D-woven sandwich panels (3DWSPs) and their interfering parameters, providing interpretation of elastic and failure results, failure maps, and reliable theoretical models for linear elastic response and observed failure mechanisms.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Yiming Zhao, Zhonggang Wang, Zhigang Yang, Bin Qin
Summary: The paper proposes a Ritz and statistical energy analysis (Ritz SEA) hybrid method for calculating rectangular plate acoustic vibration coupling in the mid-frequency range. This method combines the fast convergence and ability to handle arbitrary boundary conditions of the Ritz method with the power flow equation of the statistical energy analysis method. The results show that this approach effectively filters out random fluctuations in mid-frequency domains while demonstrating exceptional stability and precision.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Joao Henrique Fonseca, Woojung Jang, Dosuck Han, Naksoo Kim, Hyungyil Lee
Summary: This study addresses the enhancement of an injection-molded fiber-reinforced plastic / metal hybrid automotive structure and its plastic injection molding process through the integration of the finite element method, artificial intelligence, and evolutionary search methods. Experimental validation of finite element models, the generation of a database through orthogonal array and Latin hypercube methods, and the training of artificial neural networks are conducted. The genetic optimization algorithm is then applied to identify optimal process parameters. The results show significant reduction in product warpage and manufacturing time while maintaining structural strength, contributing to the advancement of composite automotive structures with superior quality.
COMPOSITE STRUCTURES
(2024)
Article
Mechanics
Alessandro Vescovini, Carina Xiaochen Li, Javier Paz Mendez, Bo Cheng Jin, Andrea Manes, Chiara Bisagni
Summary: This paper presents a study on six single-stringer specimens manufactured using the card-sliding technique with non-crimp fabrics and adopting a Double-Double (DD) stacking sequence. The specimens were tested under compression loading conditions to investigate post-buckling and failure in aerospace structures. Experimental results and numerical simulations were compared to analyze the behavior and failure modes of the specimens. The study found promising evidence of a viable solution to optimize aeronautical structures and enhance resistance to skin-stringer separation, particularly with the use of tapered flanges.
COMPOSITE STRUCTURES
(2024)