Article
Chemistry, Physical
Ibrahim A. Sharaky, Ahmed S. Elamary, Yasir M. Alharthi
Summary: The study revealed that reinforced concrete beams exhibit different responses, load capacities, and failure modes under openings of different positions and dimensions. The transversal near-center openings have the greatest impact on load capacity, while transversal near-support openings and longitudinal holes have smaller effects.
Article
Engineering, Civil
Feng Yu, Xu Li, Jie Song, Yuan Fang, Yin Qin, Shuangshuang Bu
Summary: The study found that the PVA fiber content and replacement ratio of RCA have significant influences on the flexural performance of concrete slabs, affecting parameters such as ultimate moment, cracking moment, moment corresponding to crack width, and yield moment. By proposing applicable calculation formulas, the flexural capacities of PVA fiber-reinforced recycled concrete slabs can be conveniently predicted.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Civil
Y. M. Alharthi, M. Emara, A. S. Elamary, I. A. Sharaky
Summary: This study introduces a new technique of strengthening RC beams using a limited steel-bar-reinforced mortar layer (SBRML) to reduce installation time and cost, while combining the advantages of existing techniques. Experimental results demonstrate a significant increase in bearing capacities for RC beams strengthened with different types of SBRML.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Mohamed Said, Ali S. Shanour, T. S. Mustafa, Ahmed H. Abdel-Kareem, Mostafa M. Khalil
Summary: The testing demonstrated that increasing the hybrid reinforcement ratio can significantly enhance the load-carrying capacity of concrete beams and provide better ductility. Non-linear finite element analysis effectively reflected the trend of experimental results, and parametric studies indicated that factors such as concrete compressive strength, hybrid reinforcement ratio, and shear-span to depth ratio have an impact on the performance of hybrid reinforcement concrete beams.
ENGINEERING STRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Rishi Kumar Gupta, Anirban Mahato, Anirban Bhattacharya
Summary: This study investigates the effects of different surface modifications on the flexural characteristics of carbon fiber reinforced aluminum laminates. Mechanical abrasion by 220-grit paper shows the highest flexural strength, while chemical treatment significantly improves corrosion resistance. Different laminate configurations exhibit variations in failure mechanisms.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Chemistry, Physical
Yeou-Fong Li, Hsin-Fu Wang, Jin-Yuan Syu, Gobinathan Kadagathur Ramanathan, Ying-Kuan Tsai, Man Hoi Lok
Summary: By incorporating aramid fiber and carbon fiber into concrete in a hybrid manner, this study aimed to enhance the static and impact mechanical properties of the material. The test results showed that the presence of a coupling agent on carbon fibers affected the mechanical strength of the reinforced concrete, with a 50-50% mix proportion of Kevlar/carbon fiber significantly improving compressive, flexural, and splitting tensile strengths. Additionally, the hybrid fiber-reinforced concrete exhibited better performance in mechanical strength and impact resistance compared to concrete with only Kevlar or carbon fibers.
Article
Engineering, Civil
Fei Peng, Jidong Deng, Zhi Fang, Zilong Tang
Summary: This study develops a numerical model to simulate the flexural response of R-UHPC beams and investigates the effect of various factors on the flexural failure mode and ductility behavior of R-UHPC members. The results show that higher reinforcing ratio, higher steel post-yield hardening strength, and lower steel fiber volume contribute to better ductility when the failure is controlled by fracture of tensile steel bars after crack localization. However, higher reinforcing ratio and lower UHPC compressive strength lead to lower ductility when the failure is controlled by crushing of UHPC. A flexural failure mode recognition method is also proposed and a minimum flexural reinforcement ratio is recommended to avoid low structural ductility in R-UHPC flexural members.
Article
Construction & Building Technology
Ma'en Abdel-Jaber, Mu'tasim Abdel-Jaber, Hasan Katkhuda, Nasim Shatarat, Rola El-Nimri
Summary: This study investigated the effect of using NSM-CFRP on shear strengthening of rectangle beams with different concrete strengths. The experimental and FEA results showed that NSM-CFRP can increase shear capacity and influence the failure mode of beams.
Article
Construction & Building Technology
Jiehong Li, Yang Yu, Taehwan Kim, Ailar Hajimohammadi
Summary: This paper investigates the flexural tensile behavior and splitting tensile strength of PVA fiber-reinforced foam concrete, revealing the underlying mechanism of fiber influence on both pre-crack and post-crack behavior. Machine learning technology is utilized to develop regression models that describe the importance of design parameters, fiber distribution, and pore structure. The results show that PVA fibers significantly enhance the pre-crack flexural performance and splitting tensile strength of foam concrete, and this improvement is related to the effect of fibers on the pore structure.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Bin Cai, Kaiyi Li, Feng Fu
Summary: This study investigates the flexural behavior of steel fiber-reinforced coal gangue aggregate concrete (SFCGC) and steel fiber-reinforced ordinary concrete (SFOC) beams. The effects of coal gangue replacement rate, steel fiber volume content, rebar ratio, and beam height on the beam flexural performance were studied. The specimens' failure modes, flexural capacities, flexural stiffness, ductility, and energy dissipation coefficient were analyzed. A finite element model was established to investigate the strengthening effect of steel fibers on SFCGC beams. Comparisons between simulations and tests show good agreement in the load-deflection curves and transverse strain.
Article
Chemistry, Physical
Qiaoyan Guan, Mengyu Yang, Ke Shi, Tao Zhang
Summary: This study investigates the flexural behavior of steel fiber reinforced-recycled aggregate concrete beams through experimental and finite element analysis, analyzing parameters such as steel fiber volume fraction, recycled aggregate replacement ratio, and concrete strength. The results show that the flexural bearing capacity of the beams increases with higher steel fiber volume fraction and concrete strength, and lower recycled aggregate replacement ratio. A new model for calculating the flexural bearing capacity is proposed and compared with finite element analysis results.
Article
Chemistry, Multidisciplinary
Dong-Hee Son, Baek-Il Bae, Moon-Sung Lee, Moon-Seok Lee, Chang-Sik Choi
Summary: The study evaluated the flexural performance of macro-synthetic fiber-reinforced concrete in structural deck plates, finding that the use of macro synthetic fibers can effectively enhance the flexural strength and crack load capacity of the deck plates. Additionally, a flexural strength model incorporating macro synthetic fibers showed greater accuracy compared with standard models. Further research is needed to quantitatively evaluate the impact of MFRC on the effective flexural stiffness of steel decking.
APPLIED SCIENCES-BASEL
(2021)
Article
Polymer Science
Rendy Thamrin, Zaidir Zaidir, Silvy Desharma
Summary: This study experimentally investigated the flexural behavior of RC beams strengthened with CFRP plates, analyzing the impact of the tensile reinforcement ratio, the modulus of elasticity ratio of concrete, the modulus of elasticity of the plate, and the plate thickness on the debonding moment. A simple model for predicting the debonding moment was developed based on statistical analysis, and the effect of these variables on debonding failure was confirmed through parametric studies using fiber elements and the two-dimensional finite element method.
Article
Construction & Building Technology
Rowyda A. Zaki, Basem H. AbdelAleem, Assem A. A. Hassan, Bruce Colbourne
Summary: This study found that using steel fibers in concrete at cold temperatures can improve mechanical properties and impact resistance, reduce low temperature brittleness, with more significant effects when larger volume and longer lengths of steel fibers are used.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Mechanics
Jianzhe Shi, Xin Wang, Zhishen Wu, Zhongguo Zhu
Summary: This paper focuses on the optimization of anchorage and deviator for concrete beams prestressed with external BFRP tendons. The proposed CW anchorage achieved an anchor efficiency factor of 85%. The recommended lower limit value of R-d/R-p is 200, and the upper limit value of theta is 5 degrees. The RC beam prestressed with external BFRP tendons exhibited enhanced flexural behaviors compared with the non-prestressed RC beam, and the tendons remained intact at the anchor zones and deviators.
COMPOSITE STRUCTURES
(2022)
Article
Food Science & Technology
Khubaib Ali, Muhammad Huzaifa Mehmood, Muhammad Ahmad Iqbal, Tariq Masud, Mudassir Qazalbash, Shahzad Saleem, Sheraz Ahmed, Muhammad Rizwan Tariq, Waseem Safdar, Muhammad Adnan Nasir, Muhammad Tariq Saeed, Abid Muhammad, Muhammad Naveed Sheas
FOOD SCIENCE & NUTRITION
(2019)
Article
Education, Scientific Disciplines
Muhammad Imran Din, Faria Rafique, Muhammad Sadaf Hussain, Hafiz Arslan Mehmood, Sadia Waseem
Article
Engineering, Environmental
Amit Saini, Priyanka H. Maheshwari, S. Swarupa Tripathy, Sadiya Waseem, S. R. Dhakate
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Infectious Diseases
Martin Hoenigl, Jon Salmanton-Garcia, Thomas J. Walsh, Marcio Nucci, Chin Fen Neoh, Jeffrey D. Jenks, Michaela Lackner, Rosanne Sprute, Abdullah M. S. Al-Hatmi, Matteo Bassetti, Fabianne Carlesse, Tomas Freiberger, Philipp Koehler, Thomas Lehrnbecher, Anil Kumar, Juergen Prattes, Malcolm Richardson, Sanjay Revankar, Monica A. Slavin, Jannik Stemler, Birgit Spiess, Saad J. Taj-Aldeen, Adilia Warris, Patrick C. Y. Woo, Jo-Anne H. Young, Kerstin Albus, Dorothee Arenz, Valentina Arsic-Arsenijevic, Jean-Philippe Bouchara, Terrence Rohan Chinniah, Anuradha Chowdhary, G. Sybren de Hoog, George Dimopoulos, Rafael F. Duarte, Petr Hamal, Jacques F. Meis, Sayoki Mfinanga, Flavio Queiroz-Telles, Thomas F. Patterson, Galia Rahav, Thomas R. Rogers, Coleman Rotstein, Retno Wahyuningsih, Danila Seidel, Oliver A. Cornely
Summary: With an increasing number of patients requiring intensive care or being immunosuppressed, infections caused by molds other than Aspergillus spp or Mucorales are on the rise. Antifungal prophylaxis has been effective, but breakthrough infections by other rare molds are also increasing. Regional differences should be considered in providing practical clinical decision guidance.
LANCET INFECTIOUS DISEASES
(2021)
Article
Genetics & Heredity
Madiha Islam, Abdullah, Bibi Zubaida, Nageena Amin, Rashid Iqbal Khan, Noshin Shafqat, Rabia Masood, Shahid Waseem, Jibran Tahir, Ibrar Ahmed, Muhammad Naeem, Habib Ahmad
FRONTIERS IN GENETICS
(2021)
Article
Construction & Building Technology
Muhammad Safdar, M. Neaz Sheikh, Muhammad N. S. Hadi
Summary: This paper proposes two novel reinforcement details for GFRP-reinforced concrete exterior beam-column connections and verifies their advantages in terms of load capacity, ductility, and energy dissipation through experimental comparison.
ACI STRUCTURAL JOURNAL
(2022)
Article
Veterinary Sciences
Usman Rashid, Arfan Yousaf, Muhammad Yaqoob, Evelyn Saba, Muhammad Moaeen-ud-Din, Shahid Waseem, Sandra K. Becker, Gerhard Sponder, Jorg R. Aschenbach, Mansur Abdullah Sandhu
Summary: In this study, we found that canine MSCs derived from infrapatellar fat pad (IPFP) have the highest proliferation rate, while those from omental (OM) adipose tissue have higher cell metabolism. MSCs from all sources showed positive expression of CD73, CD90, CD105, and low expression of CD45. The differentiation potential of canine MSCs isolated from different adipose tissue sources was assessed, with OM-derived MSCs showing better differentiation potential towards adipo- and osteogenic lineages.
BMC VETERINARY RESEARCH
(2021)
Article
Polymer Science
Muhammad Akhlaq, Abul Kalam Azad, Shivkanya Fuloria, Dhanalekshmi Unnikrishnan Meenakshi, Sajid Raza, Muhammad Safdar, Asif Nawaz, Vetriselvan Subramaniyan, Mahendran Sekar, Kathiresan V. Sathasivam, Yuan Seng Wu, Mireia Mallandrich Miret, Neeraj Kumar Fuloria
Summary: Transdermal patches containing flaxseed and coriander oils for tizanidine delivery were formulated and evaluated for drug release kinetics, skin permeation, and therapeutic efficacy. Results showed that flaxseed oil-loaded patches performed better than coriander oil-loaded patches in terms of drug flux through rabbit skin, suggesting flaxseed oil as a preferable choice for formulating tizanidine patches.
Article
Biology
Siwen Wu, Faiz-ul Hassan, Yuhong Luo, Israr Fatima, Ishtiaq Ahmed, Awais Ihsan, Warda Safdar, Qingyou Liu, Saif ur Rehman
Summary: A total of 29 fibronectin type III domain (FN-III) protein genes were identified and characterized in the buffalo genome. Molecular and evolutionary analysis showed the well-conserved nature of FN-III proteins with diverse properties. The study also predicted the binding scores and interface residues of FNDC5/irisin as a ligand for various receptors, revealing its functional role in energy homeostasis, folliculogenesis, and spermatogenesis in buffalo.
Article
Engineering, Civil
Muhammad Safdar, M. Neaz Sheikh, Muhammad N. S. Hadi
Summary: This study investigated the effects of different configurations of connection reinforcement and anchorages on the cyclic behavior of glass fiber-reinforced polymer reinforced-concrete exterior beam-column connections. The results showed that using L-shaped anchorage with additional U-shaped bars at the connection region significantly improved the strength, ductility, and energy dissipation of the connections.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2022)
Article
Engineering, Civil
Muhammad Safdar, M. Neaz Sheikh, Muhammad N. S. Hadi
Summary: This study numerically investigated the behavior of reinforced concrete (RC) exterior beam-column joints (T-joints) under cyclic loading. The results showed that increasing the flexural reinforcement ratio of the beam improved the strength and stiffness of the GFRP-RC T-joints. Higher joint aspect ratios resulted in premature failure of the GFRP-RC T-joints. Additionally, increased joint confined area by lateral beams enhanced the strength of the GFRP-RC T-joints.
Review
Microbiology
Haroon Ahmed, Seyma Gunyakti Kilinc, Figen Celik, Harun Kaya Kesik, Sami Simsek, Khawaja Shafique Ahmad, Muhammad Sohail Afzal, Sumaira Farrakh, Waseem Safdar, Fahad Pervaiz, Sadia Liaqat, Jing Zhang, Jianping Cao
Summary: In recent years, there has been a comprehensive assessment of the use of natural plant products to treat helminth parasites in veterinary science. The study reviewed a large number of medicinal plants and their pharmacological effects, providing valuable information for the development of effective management strategies against helminth parasites. A total of 259 potential plant species were identified as sources of anthelmintic drugs, which could potentially reduce economic losses and improve livestock production.
Article
Multidisciplinary Sciences
Gage K. Moreno, Katarina M. Braun, Kasen K. Riemersma, Michael A. Martin, Peter J. Halfmann, Chelsea M. Crooks, Trent Prall, David Baker, John J. Baczenas, Anna S. Heffron, Mitchell Ramuta, Manjeet Khubbar, Andrea M. Weiler, Molly A. Accola, William M. Rehrauer, Shelby L. O'Connor, Nasia Safdar, Caitlin S. Pepperell, Trivikram Dasu, Sanjib Bhattacharyya, Yoshihiro Kawaoka, Katia Koelle, David H. O'Connor, Thomas C. Friedrich
NATURE COMMUNICATIONS
(2020)
Review
Medicine, General & Internal
Franck Mauvais-Jarvis, Noel Bairey Merz, Peter J. Barnes, Roberta D. Brinton, Juan-Jesus Carrero, Dawn L. DeMeo, Geert J. De Vries, C. Neill Epperson, Ramaswamy Govindan, Sabra L. Klein, Amedeo Lonardo, Pauline M. Maki, Louise D. McCullough, Vera Regitz-Zagrosek, Judith G. Regensteiner, Joshua B. Rubin, Kathryn Sandberg, Ayako Suzuki
Article
Engineering, Environmental
Samina Ghafoor, Asia Inayat, Faryal Aftab, Hatice Duran, Katrin Kirchhoff, Sadia Waseem, Salman Noshear Arshad
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)
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)
