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Journal articles on the topic 'Severe loading condition'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Kanhaiya, Krishnakant, and Dr Ajay Kumar Jain. "“A Comparative Study of Circular Water Tank in Two Different Loading Conditions (Seismic and Wind Load Condition) using Staad-Pro”." International Journal of Innovative Technology and Exploring Engineering 11, no. 3 (2022): 75–79. http://dx.doi.org/10.35940/ijitee.l9562.0111322.

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In this paper a comparison of the two loading combinations of a circular water tank i.e. seismic and wind load conditions have been made. The STAADPro software has been used to analyze the circular water tank structure and to compare both the loading combinations. Two similar models of a circular water tank were created, provided with the required attributes (i.e. loading conditions, zones etc.) and were analyzed in both, seismic load condition and wind load condition. The comparison of results from both the analyses revealed that, due to lower seismic zones, the effect of earthquake is slight

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2

Krishnakant, Kanhaiya, and Ajay Kumar Jain Dr. "A Comparative Study of Circular Water Tank in Two Different Loading Conditions (Seismic and Wind Load Condition) using Staad-Pro." International Journal of Innovative Technology and Exploring Engineering (IJITEE) 11, no. 3 (2022): 75–79. https://doi.org/10.35940/ijitee.L9562.0111322.

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<strong>Abstract:</strong> In this paper a comparison of the two loading combinations of a circular water tank i.e. seismic and wind load conditions have been made. The STAADPro software has been used to analyze the circular water tank structure and to compare both the loading combinations. Two similar models of a circular water tank were created, provided with the required attributes (i.e. loading conditions, zones etc.) and were analyzed in both, seismic load condition and wind load condition. The comparison of results from both the analyses revealed that, due to lower seismic zones, the eff

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3

Arabshahi, Zohreh, Jamal Kashani, S. S. R. Koloor, Mohammed Rafiq Abdul Kadir, and Abbas Azari. "Design Analysis of TMJ Implant under Physiological Loading Condition." Advanced Materials Research 488-489 (March 2012): 996–1000. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.996.

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Equal channel angular extrusion (ECAE) is a severe plastic deformation (SPD) method for obtaining bulk nanostructured materials. The ECAE die consists of two equal channels that intersect at an angle, usually between 90。and 135。. In the present study, the plastic deformation behavior of copper during the ECAE process with 120o die was investigated. To analyze the deformation behavior and the related strain distributions in the specimen, the commercial FE code ABAQUS has been used. The properties of the materials are strongly dependent on the shear plastic deformation behavior during equal chan

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4

Zhang, Fu Xiang, Bing Yin Ji, Xiang Tong Yang, Yong Han, and Ze Liang Chang. "Finite Element Numerical Simulation of Tubing Premium Connection." Applied Mechanics and Materials 217-219 (November 2012): 1622–27. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.1622.

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The environment and load condition of tubing is severe in high pressure wells. The sealability and joint strength of tubing string plays an important role in production operation. In this study, the makeup, sealability and joint strength was analyzed from conditions of make-up loading, tension loading, compression loading and internal pressure loading by finite element method. The makeup torque, the contact pressure distributions of metal seal along the axis and the stress distributions of threaded connection are given. The results show that under tension loading, compression loading and inter

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5

Salim, Nur Ashida, Muhammad Murtadha Othman, Ismail Musirin, Mohd Salleh Serwan, and Stendley Busan. "Severe Total Loading Condition Attributed by a Significant Impact of Dynamic Power System Cascading Collapse." Applied Mechanics and Materials 785 (August 2015): 445–49. http://dx.doi.org/10.4028/www.scientific.net/amm.785.445.

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Cascading outage is a sequence of multiple dependent component outages that gradually happened in a power system. One of the main reasons is due to the hidden failure in a protection system that may cause to a power system instability leading to a system cascading collapse. This paper presents a computationally realistic technique used to determine the estimated average probability of a dynamic system cascading collapse in conjunction with the effect of hidden failure on a protection system. This includes a realistic calculation of the probability of hidden failure as it will provide significa

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Yang, Yong Biao, Zhi Min Zhang, and Fu Chi Wang. "Fracture Mechanisms Anisotropy of AZ31 Magnesium Plate under Impact Loading Condition." Advanced Materials Research 266 (June 2011): 233–36. http://dx.doi.org/10.4028/www.scientific.net/amr.266.233.

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Dynamic mechanical properties of AZ31 magnesium alloy plate were carried out using split Hopkinson pressure bar (SHPB) with compression direction 0° and 90° from normal direction respectively. Optical microscopy (OM) and scanning electronic microscopy (SEM) were used for the observation of microstructure and fractograph. OM observations showed that cracks initiated and propagated along localized deformed bands consisted of twin intersection for 0° specimen, and that cracks initiated and propagated along localized transformed bands consisted of fine equiaxed dynamic recrystallized grains for 90

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7

Kim, Jung Seok, and Nam Po Kim. "Structural Assessment for Bogie Frame of 180km/h Korean Tilting Train." Key Engineering Materials 297-300 (November 2005): 345–50. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.345.

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This paper has performed the fatigue strength evaluation for the bogie frame of Korean tilting train. In order to verify the structural safety of the bogie frame, we firstly investigated the loading condition imposed on the bogie frame. The bogie frame of the tilting train is exposed to the more severe loadings compared with the conventional one because of the tilting of the carbody and the high-speed curve negotiation. We have conducted some multi-body dynamic analyses to extract the load condition by tilting on curve. The finite element analysis is used to obtain the stress distribution. Thr

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8

Bataev, Ivan A., Igor A. Balagansky, Anatoly Bataev, and Kazuyuki Hokamoto. "Transformation of Structure in Carbon Steel Specimen under Loading by Mach Stem, Formed in Preliminary Compressed High Explosive Charge TG-40." Materials Science Forum 673 (January 2011): 89–94. http://dx.doi.org/10.4028/www.scientific.net/msf.673.89.

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A structure of a carbon steel specimen after explosive loading is investigated. The loading was executed by Mach stem, formed in high explosive charge that was preliminary compressed by advanced wave in ceramic bar. In the original condition the specimen had a typical for low carbon steel ferrite-pearlite structure. Metallographic analysis has shown that during the process of the explosive loading the following structural changes took place: formation of numerous deformation twins in both ferrite grains and pearlite colonies (i.e. in two-phase structure); formation of extended bands of localiz

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9

Situ, M., and J. A. Schetz. "Numerical Calculations of the Breakup of Highly Loaded Slurry Jets." Journal of Fluids Engineering 109, no. 3 (1987): 332–36. http://dx.doi.org/10.1115/1.3242669.

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A complete numerical calculation procedure for predicting the effects of mass loading and particle diameter on laminar slurry jet breakup in a low velocity, coaxial gas stream has been developed. The method is based on the Volume of Fluid technique for the Navier-Stokes equations. The severe restrictions involved in earlier treatments have been relaxed. The influence of particle loading on liquid phase density and the influence of particle spacing on drag are included. The particular case considered is a slurry with a methanol liquid phase with aluminum oxide beads in order to compare with som

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10

Liao, Yiping, Xiaoshan Liu, Guoqiu He, et al. "Path-dependent multiaxial fatigue behavior of A319 aluminum alloy under non-proportional loading conditions." Materials Testing 65, no. 5 (2023): 684–98. http://dx.doi.org/10.1515/mt-2022-0287.

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Abstract In the multiaxial low fatigue test study, four multiaxial non-proportional fatigue loading paths were used including rectangular, square, rhombic and circular. The effect of loading condition changes on the fatigue behavior and cyclic damage characteristics of A319 aluminum alloy was investigated by means of stress response curves, stress–strain hysteresis lines, fatigue fracture morphology, and dislocation substructure morphology in combination with material microstructure. The non-proportional hardening behavior exhibits strong loading path dependence, and the fatigue plastic deform

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11

Xiao, Shihong, Xiaosheng Luan, Zhiqiang Liang, Xibin Wang, Tianfeng Zhou, and Yue Ding. "Fracture Analysis of Ultrahigh-Strength Steel Based on Split Hopkinson Pressure Bar Test." Metals 12, no. 4 (2022): 628. http://dx.doi.org/10.3390/met12040628.

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Impact loading is an important cause of fracture failure of ultrahigh-strength steel parts during service. Revealing the fracture mechanism of ultrahigh-strength steel under impact loading has important reference significance for the material preparation, part design, and manufacturing of such steel. Based on the split Hopkinson pressure bar (SHPB) test, the mechanical response characteristics of 45CrNiMoVA steel under impact loading were analyzed, and the true stress–true strain curves under a high strain rate (103 s−1) were obtained. It was found that under the simultaneous action of forward

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12

Baba, K., H. Fuyama, and M. Ochi. "A Simple Method for Fluid-Structure Interaction Analysis Under Cavitation Condition." Journal of Pressure Vessel Technology 120, no. 1 (1998): 29–34. http://dx.doi.org/10.1115/1.2841881.

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In fluid-structure interaction problems, many studies are done by linear formulations. But severe loading may cause cavitation that shows nonlinear behavior. In handling cavitation phenomena, a displacement potential was introduced or density was used as the variable. Each method loses the conservation of liquid volume that is vital for liquid-filled tanks; mesh size should be the scales of cavitation. This paper proposes a simple method based on Lagrange multiplier method. A numerical example is shown for a one-dimensional problem together with a comparison to an experimental result.

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13

Wang, Yan Ling, Song Xiao Hui, Wen Jun Ye та Rui Liu. "Dynamic Behaviors of near β-Type Ti-5Al-5Mo-5V-3Cr Titanium Alloys under High Strain Rate". Materials Science Forum 816 (квітень 2015): 795–803. http://dx.doi.org/10.4028/www.scientific.net/msf.816.795.

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The mechanical properties and fracture failure behavior of the near β-type Ti-5Al-5Mo-5V-3Cr-X (X = 1Fe or 1Zr) titanium alloys were studied by Split Hopkinson Pressure Bar (SHPB) experiment under the dynamic loading conditions at a strain rate of 1.5 × 103 s-1–5.0 × 103 s-1. Results showed that the SHPB specimen fractured in the direction of maximum shearing stress at an angle of 45° with the compression axis. The fracture surface revealed the shear and tension zones with cleavage steps and parabolic dimples. Severe early unloading was observed on the Ti-5553 alloy under a strain rate of 4,90

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14

Jiang, Minmin, Zhao Lu, Zhengyin Cai, and Guangming Xu. "Centrifuge Modelling of Composite Bucket Foundation Breakwater in Clay under Monotonic and Cyclic Loads." Journal of Marine Science and Engineering 12, no. 3 (2024): 469. http://dx.doi.org/10.3390/jmse12030469.

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This study investigates the monotonic and cyclic performance of composite bucket foundation breakwater in clay through centrifuge modeling. The application of monotonic loads simulates extreme wave conditions, and cyclic load corresponds to long-term serviceability conditions. In centrifuge tests, three typical soil strengths were tested, and two load eccentricities were simulated to check the influence of wave force height. Multiple measurements were conducted, including rotation angle, horizontal displacement, vertical settlement, and pore pressure variation. When soil strength increases in

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15

Lebedeva, D. I., E. F. Turovinina, A. N. Marchenko, et al. "Rehabilitation after severe haff disease." Russian Osteopathic Journal, no. 1 (March 26, 2024): 92–105. http://dx.doi.org/10.32885/2220-0975-2024-1-92-105.

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The article presents a description of the effectiveness of complex rehabilitation of a patient after a severe of Gaff′s disease with an osteopathic diagnosis: Global neurodynamic disorder (impaired production of the cranial rhythmic impulse). The patient was assigned a rehabilitation plan, the objectives of which were to increase exercise tolerance up to 30 minutes, as well as adaptation to aerobic exercise: osteopathic correction; locomotor regimen; active verticalization; breathing exercises, exercise therapy, articular exercises, cardiac loading, as well as the expansion of the locomotor re

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16

Nikam, Dipti, and Abbas S. Milani. "Physiological Response of a Natural Central Incisor Tooth to Various Loading Conditions: A 3D Finite Element Study." Recent Progress in Materials 05, no. 02 (2023): 1–17. http://dx.doi.org/10.21926/rpm.2302017.

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This study evaluates the influence of different loading angles and the area of loading on the ensuing stress distribution and the physical response of a natural central incisor tooth, using a 3D finite element analysis. The CAD model of the incisor tooth assembly (including enamel, dentin, periodontal ligament, pulp, gingiva and jaw bone) was subject to an external (chewing) load of 100 N, over four different areas and at four different angles along the vertical. It was observed that the tooth experiences high von-Mises equivalent stresses and high bending when the load applied is closer to th

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17

Elicegui, Steven, Melissa Requist, Tyler Rogers, et al. "Investigation of subtle Lisfranc injuries using weight-bearing computed tomography." Journal of the Foot & Ankle 18, no. 1 (2024): 101–7. http://dx.doi.org/10.30795/jfootankle.2024.v18.1769.

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Introduction: Lisfranc ligamentous injuries are common yet remain a diagnostic challenge. Automated analysis of weight-bearingcomputed tomography (WBCT) images has been investigated to diagnose various pathologies. However, it has not been studied forLisfranc ligament injuries. The objective of the study was to examine whether automated WBCT analysis could demonstrate diagnosticutility for these injuries. Methods: Serial sectioning of Lisfranc complex ligaments was conducted on 24 cadaveric limbs to simulate Lisfranc injuries. WBCT images were collected at each dissection condition under three

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18

Konadu-Yeboah, Dominic, Peter Konadu, Ampem Darkwa, Banahene, and Adu-Osei. "Severe Infantile Blount’s Disease in Kumasi, Ghana: A Case Report." Journal of Preventive Medicine And Care 3, no. 1 (2019): 1–9. http://dx.doi.org/10.14302/issn.2474-3585.jpmc-19-3009.

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Blount’s disease, also known as tibia vara, is a developmental disorder involving the posteromedial proximal tibial physis resulting in progressive varus, procurvatum and internal torsion of the affected tibia 1. The condition was first published by Blount in 1973 2. The aetiology of this disease is unkown. However, associations exist between blount’s disease and the Afro-Caribbean race, early age of walking and obesity 3, 4. Furthermore, genetic predisposition has been postulated as well as mechanical loading of the physis 4, 5, 6. Affected children are usually overweight and start walking ea

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19

Shrivastava, Ruchir, and K. K. Singh. "Flexural response of glass/epoxy composites to thermal shocks and conditioning environment in varying loading rate." IOP Conference Series: Materials Science and Engineering 1248, no. 1 (2022): 012089. http://dx.doi.org/10.1088/1757-899x/1248/1/012089.

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Abstract The structural integrity of composites faces severe challenge in the form of environmental extremes. Therefore, its performance in those cases were of great interest. In the present work, flexural strength of glass/epoxy composites were analysed in the environment of thermal shock generated by cryogenic exposure as well by thermal conditioning. Four cases were chosen, room temperature (RT), cryogenic conditioning (LN), thermal conditioning below (BG) and above glass transition temperature (AG). The exposure time for all the environments was kept constant at 24 hours. These responses a

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20

Kovalchuk, Vitalii, Mykola Sysyn, Olga Nabochenko, Andrii Pentsak, Oleh Voznyak, and Stepan Kinter. "Stability of the Railway Subgrade under Condition of Its Elements Damage and Severe Environment." MATEC Web of Conferences 294 (2019): 03017. http://dx.doi.org/10.1051/matecconf/201929403017.

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Investigation of damages of the subgrade slope in combination with its overwetting and rolling stock loading, which significantly affects safety traffic of the railway transport, has been carried out. The complex method of slope stability estimation of the subgrade is developed, which includes calculation of loads and vibration action of rolling stock on the main site of the subgrade, as well as the dynamic model of vibrations propagation in the body of the subgrade embankment and the model of plastic deformations accumulation. Dynamic and nonlinear plastic models are based on a finite-element

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21

XU, JIANG, FENG WANG, and ZILI LIU. "INVESTIGATION OF THE TRIBOLOGY BEHAVIORS OF AUTO-RESTORATION ADDITIVE UNDER HEAVY LOADING CONDITIONS." Surface Review and Letters 14, no. 02 (2007): 329–34. http://dx.doi.org/10.1142/s0218625x07008998.

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Lubricant additives are crucial in minimizing friction and wear, and protecting surfaces under severe contact condition. The traditional additive can only diminish the wear rate of materials by increasing the sliding distance. As a wear-self-compensation lubricating additive, the auto-restoration technology (ART) of worn surface of metals is a novel technique for the repair of mechanical equipment and breakthrough of tribology theory that cannot obey the traditional law. The previous experiments have measured the friction and wear behaviors of ART additives under low load conditions. This pape

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22

Hao, Yuchen, Jinhua Wang, Bin Wu, et al. "Study on the most severe condition for structural assessment of nuclear fuel transport package under impact loading." Progress in Nuclear Energy 153 (November 2022): 104447. http://dx.doi.org/10.1016/j.pnucene.2022.104447.

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Yang, Shengli, Hao Yue, Gaofeng Song, Junjie Wang, Yanyao Ma, and Fengqi Liu. "3D Physical Modelling Study of Shield-Strata Interaction under Roof Dynamic Loading Condition." Shock and Vibration 2021 (February 10, 2021): 1–7. http://dx.doi.org/10.1155/2021/6618954.

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The dynamic hazards in the open face area caused by the impact load of the massive strong roof become increasingly severe with the increase in the cutting height of the longwall face and its depth of cover. Understanding the strata-shield interaction under the dynamic impact loading condition may relieve the dynamic hazards. In this paper, a 3D physical modelling platform is developed to study the interaction between the roof strata and the longwall shield under the dynamic impact load conditions. A steel plate is dropped to the coal face wall at a certain height above the immediate roof to si

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24

Okura, Mahito, Motohiro Sakaki, and Takuya Yoshizawa. "Should Liability Insurance Be Compulsory for Bicycle Accidents?" Asian Journal of Law and Economics 12, no. 1 (2021): 19–35. http://dx.doi.org/10.1515/ajle-2020-0061.

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Abstract This study examines whether the introduction of compulsory bicycle liability insurance is socially desirable when evaluation bias—the difference between the objective and subjective evaluations of liability amounts—exists. The main results of this study are summarized as follows. First, when there is no evaluation bias, the introduction of compulsory bicycle liability insurance is socially desirable when the interest rate is high without any condition, and the loading rate is low, the maximum amount of liability is small, and the effort cost is high if the loading rate is higher than

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25

Conard, B. E., R. A. Lohnes, F. W. Klaiber, and T. J. Wipf. "Boundary Effects on Response of Polyethylene Pipe Under Simulated Live Load." Transportation Research Record: Journal of the Transportation Research Board 1624, no. 1 (1998): 196–205. http://dx.doi.org/10.3141/1624-23.

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The objective of this paper is to evaluate the deflection response of polyethylene pipes when loaded near their ends. Tests were conducted on pipes loaded at the center and near their ends to simulate loading of a vehicle at the center of a roadway and on the shoulder. The tests were performed on 900-mm (36-in.) and 1200-mm (48-in.) diameter polyethylene pipes with 610-mm (2 ft) cover and a variety of backfills. Loads were applied through a 93 025-mm2 (1-ft2) plate that provides very severe loading conditions. At high contact stresses, the load test plate punched into the soil cover so that th

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26

Im, S., D. Baccarella, B. McGann, Q. Liu, L. Wermer, and H. Do. "Unstart phenomena induced by mass addition and heat release in a model scramjet." Journal of Fluid Mechanics 797 (May 24, 2016): 604–29. http://dx.doi.org/10.1017/jfm.2016.282.

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The unstart phenomena in a model scramjet with a free stream Mach number of 4.5 were investigated at an arc-heated hypersonic wind tunnel. High-speed schlieren imaging and high resonance frequency pressure measurements were used to capture the flow features during the unstart process. Three unstart conditions were tested: (i) a low-enthalpy free stream with mass loading, (ii) a high-enthalpy free stream with mass loading and (iii) a high-enthalpy free stream with mass loading and heat release. It was revealed that the unstart threshold and the time from the onset to the completion of unstart d

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27

Datkar, Nivrutti V. "Comparative Analysis of Circular and Rectangular Water Tank in Severe Seismic Zones." International Journal for Research in Applied Science and Engineering Technology 13, no. 4 (2025): 4893–901. https://doi.org/10.22214/ijraset.2025.69394.

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In the present work a comparative analysis for finding the optimized shape of water tank was performed. All models were then analyzed with action of loads and loading combinations prescribed by IS 1893 using STAAD PRO V8i SS5 series software for getting the most efficient and precise results. Total 08 models will be analyzed as per IS 1893 (part2), which are divided as 04 models of circular shape tank in all 04 seismic zones with tank empty condition and 04 models of rectangular shape tank in all 04 seismic zones with tank full condition after detailed analysis it was found that In tank full c

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28

Sato, M., S. Harasawa, Y. Konishi, T. Maruyama, and S. J. Park. "Power Law of Critical Buckling in Structural Members Supported by a Winkler Foundation." Journal of Mechanics 33, no. 3 (2016): 369–74. http://dx.doi.org/10.1017/jmech.2016.112.

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AbstractIn the fields of engineering, nanoscience, and biomechanics, thin structural members, such as beams, plates, and shells, that are supported by an elastic medium are used in several applications. There is a possibility that these thin structures might buckle under severe loading conditions; higher-order, complicated elastic buckling modes can be found owing to the balance of rigidities between the thin members and elastic supports. In this study, we have shown a new and simple ‘power law’ relation between the critical buckling strain (or loads) and rigidity parameters in structural memb

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29

Horr, A. M. "Nonlinear spectral dynamic analysis of guyed towers. Part I: Theory." Canadian Journal of Civil Engineering 31, no. 6 (2004): 1051–60. http://dx.doi.org/10.1139/l04-083.

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One of the important parameters in the analysis and design of large space structures is to account for the dynamic forces induced by wind and the subsequent progressive collapse. During the past two decades, problems of extreme loading conditions have been considered by some authors, and special attention has been devoted to the collapse modes. Nonlinear time history dynamic analysis, involving the post-buckling characteristics of the space structures, may be analyzed using the conventional finite element method. However, to guarantee stability and accuracy of the solution, the number of eleme

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Huang, Qi, Yann Charles, Cécilie Duhamel, Monique Gasperini, and Jérôme Crepin. "Mechanical Fields on Cross-Shaped Specimens for Stress Corrosion Cracking of Cold-Worked Austenitic Stainless Steels." Materials Science Forum 941 (December 2018): 1722–27. http://dx.doi.org/10.4028/www.scientific.net/msf.941.1722.

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The aim of this work is to better understand the evolution of the mechanical fields in cross-shaped specimens used to study the stress corrosion cracking (SCC) susceptibility of cold-worked stainless steels exposed to the primary water of nuclear power plants. Cross-shaped specimens are used since a loading path change leads to more severe cracking than a monotonous loading. During SCC tests, only the applied load and displacement can be measured as a result of experimental equipment limitations. Therefore, a mechanical test is performed ex-situ under similar condition as the ones applied duri

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Park, Sang-Youn, Jungsub Lee, Jong-Tae Heo, Gyeong Beom Lee, Hyun Hui Kim, and Byoung-Ho Choi. "Assessment of Fatigue Lifetime and Characterization of Fatigue Crack Behavior of Aluminium Scroll Compressor Using C-Specimen." Applied Sciences 10, no. 9 (2020): 3226. http://dx.doi.org/10.3390/app10093226.

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Currently, a scroll compressor is used in many industrial fields; hence, research on its reliability is important. The major loading type during operation is pressure. However, unexpected contact between scroll compressors typically occurs, and thus, the severe loading condition should be considered. To consider this condition, the study modified the scroll compressor’s structure to a C-type specimen. The study applied cyclic axial load in the specimen. The main objective of the study is to define a proper fatigue life method for the aluminium scroll compressor and proper finite element method

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Datkar, Nivrutti V., and Prof A. R. Pohare. "Study and Analysis of Circular and Rectangular Water Tank in all Seismic Zones." International Journal for Research in Applied Science and Engineering Technology 13, no. 4 (2025): 4724–33. https://doi.org/10.22214/ijraset.2025.69393.

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Abstract: In the present work a comparative analysis for finding the optimized shape of water tank was performed. All models were then analyzed with action of loads and loading combinations prescribed by IS 1893 using STAAD PRO V8i SS5 series software for getting the most efficient and precise results. Total 08 models will be analyzed as per IS 1893 (part2), which are divided as 04 models of circular shape tank in all 04 seismic zones with tank empty condition and 04 models of rectangular shape tank in all 04 seismic zones with tank empty condition after detailed analysis it was found that rec

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33

Chen, Qingqiang, Yalei Yu, Jie Sun, Cainian Jing, Yanhua Zhao, and Jia Wang. "Investigation of the Wear Behavior of Surface Welding AZ91 and AZ91+Gd Alloys under Variable Loading Conditions." Crystals 11, no. 5 (2021): 554. http://dx.doi.org/10.3390/cryst11050554.

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Adding rare earth elements to magnesium alloys is an effective way to improve their wear resistance. However, the effect achieved is closely related to the friction condition. In this paper, two different types of welding wires, AZ91 magnesium alloy and AZ91 + gadolinium (Gd), were used for surface welding. Dry sliding friction and wear experiments were performed on the surfacing alloys using the pin-on-disc test. The effects of Gd addition on the wear resistance and wear mechanism of the alloy were systematically studied under low to high loads. The results show that as the load increases, th

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Li, Diyuan, Zhi Sun, Quanqi Zhu, and Kang Peng. "Triaxial Loading and Unloading Tests on Dry and Saturated Sandstone Specimens." Applied Sciences 9, no. 8 (2019): 1689. http://dx.doi.org/10.3390/app9081689.

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The brittle failure of hard rock due to the excavation unloading in deep rock engineering often causes serious problems in mining and tunneling engineering, and the failure process is always affected by groundwater. In order to investigate the effects of stress paths and water conditions on the mechanical properties and failure behavior of rocks, a series of triaxial compression tests were conducted on dry and saturated sandstones under various loading and unloading paths. It was found that when the sandstone rock samples are saturated by water, the cohesion, the internal friction angle and th

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Meyer, Lothar W., Matthias Hockauf, Anton Hohenwarter, and Steffen Schneider. "Ultimate Strength of a Tungsten Heavy Alloy after Severe Plastic Deformation at Quasi-Static and Dynamic Loading." Materials Science Forum 584-586 (June 2008): 405–10. http://dx.doi.org/10.4028/www.scientific.net/msf.584-586.405.

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A tungsten heavy alloy (92%W, Ni-Co matrix) is subjected to severe plastic deformation (SPD) by high pressure torsion (HPT) at room temperature up to equivalent strains of 0.7, 5.3, 10.7 and 14.3. The microstructure and the mechanical properties are investigated by cylindrical compression samples at quasi-static and dynamic loading. The harder spherical W particles are homogeneously deformed within the softer matrix, becoming ellipsoidal at medium strains and banded at high strains without shear localization or fracture. Results of quasi-static loading show that the strength is approaching a l

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Chen, Zhou, Yibo Jiang, Zheming Tong, and Shuiguang Tong. "Fatigue Damage of an Asperity in Frictionless Normal Contact with a Rigid Flat." Metals 11, no. 4 (2021): 545. http://dx.doi.org/10.3390/met11040545.

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Surface fatigue wear widely exists, and it occurs as long as a sufficient number of loading–unloading cycles are applied. Slowing down surface fatigue wear requires understanding the evolution of fatigue damage in the surface. Real surfaces are composed of many asperities; therefore, it is important to study the fatigue damage of a single asperity. A finite element model of an asperity subjected to cyclic elastic–plastic normal loading was developed under frictionless contact condition. The asperity can be either completely or partially unloaded in a loading cycle. For the sake of completeness

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Yusupov, Umidbek, and Xumoyun Shavkatov. "Development of a standard mileage for large-sized tires under moderately severe quarry conditions." BIO Web of Conferences 141 (2024): 04034. https://doi.org/10.1051/bioconf/202414104034.

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The tire life depends on many factors, such as the correct loading of the dump truck, longitudinal and transverse slopes of the road, turning radius, internal tire pressure, uniform distribution of the loaded ore, average operating speed of the dump truck, road surface, its condition and type, driver skill, ambient temperature, etc. It has been studied that one of the ways to increase the mileage of tires can be to reduce the number of sections, if technically possible, with longitudinal slopes of more than 8%. Based on the results of the experiment conducted at Navoi Mining and Metallurgical

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Kang, Hyung Seok, Ji-Eun Park, Young-Jin Lee, Ih-Seop Chang, Yong-Il Chung, and Giyoong Tae. "Preparation of Liposomes Containing Oleanolic Acid via Micelle-to-Vesicle Transition." Journal of Nanoscience and Nanotechnology 7, no. 11 (2007): 3944–48. http://dx.doi.org/10.1166/jnn.2007.099.

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Micelle-to-vesicle transition method was used to make liposomes containing oleanolic acid. First, the solubilization of potassium salt of oleanolic acid at basic condition by micelle formation was confirmed. Using the soluble state of oleanolic acid at basic condition, liposomes containing oleanolic acid was prepared by adjusting pH. After making homogeneous aqueous mixture of potassium salt of oleanolic acid and lecithin in basic condition, the solution was neutralized to produce the lecithinbased liposomes that contain oleanolic acid inside the lipid bilayers. The optimal loading of oleanoli

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Dwi Puspitasari, Nia, Bambang Piscesa, M. Attard Mario, et al. "Parameter Identification for Modeling Steel Fiber Reinforced Concrete under Compression to Prevent Concrete Cover Spalling under Severe Earthquake Loading Condition." E3S Web of Conferences 156 (2020): 05028. http://dx.doi.org/10.1051/e3sconf/202015605028.

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The use of steel fiber in concrete material can improves both the strength and the ductility of concrete. The fibers can postpone or mitigate the concrete cover spalling under severe loading conditions such as during an earthquake. In this paper, the behavior of Steel Fiber Reinforced Concrete (SFRC) under compression is modeled using the Attard and Setunge’s stress-strain model. The parameter identification consisted of the elastic modulus (Ec), the peak strength (/cc), the residual strength (fes), and the peak strain of concrete under compression (ecc). From the investigation, it is found th

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Tomizawa, Yusuke, Takehito Suzuki, Katsuhiko Sasaki, Ken-Ichi Ohguchi, and Daisuke Echizenya. "Biaxial Ratchetting Deformation of Solders Considering Halt Conditions." Key Engineering Materials 725 (December 2016): 299–304. http://dx.doi.org/10.4028/www.scientific.net/kem.725.299.

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Recently, Halt (Highly accelerated limit test) is widely employed for evaluation of reliability of electronic products. Halt condition is quite severe. The tested products are subjected to mechanical impacts, thermal shock, and vibration at same time. However, there has not been a reasonable and accurate evaluation method for Halt yet. To construct an accurate evaluation method of Halt, basic deformation mechanism of parts of the electronic products should be clarified from both experimental and theoretical points of view. In this paper, focusing on solder joints of circuit boards of electroni

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Su, D. C., Y. J. Shi, and G. H. Xu. "Numerical study of the rotational direction effect on aerodynamic loading characteristics of shipborne helicopter rotor." Aeronautical Journal 123, no. 1263 (2019): 635–57. http://dx.doi.org/10.1017/aer.2019.20.

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ABSTRACTNumerical simulations of ship/rotor-coupled flowfield have been performed to investigate the rotational direction effects on a shipborne single-rotor helicopter in different deck landing trajectories (i.e., lateral and longitudinal translation) based on Reynolds-averaged Navier-Stokes (RANS) solver. Both the momentum source model and moving overset mesh model are employed to simulate the effect of the rotor on the ship airwake for different levels of fidelity requirement. The aerodynamic loading characteristics in terms of time-averaged and root-mean-square (RMS) thrust and pitch and r

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Ikpe, Aniekan E., and Ikechukwu Owunna. "Design of Vehicle Compression Springs for Optimum Performance in their Service Condition." International Journal of Engineering Research in Africa 33 (November 2017): 22–34. http://dx.doi.org/10.4028/www.scientific.net/jera.33.22.

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Helical compression spring plays a vital role in vehicle application as it improves ride index, sustains the vehicle against extreme degrees of vibration and stress induced on the suspension system as a result of uneven road. Depending on the extent of load acting on the suspension system, material selection, design considerations and manufacturing processes, longevity and performance of the spring may be sustained, otherwise the spring may fail prematurely under severe loading condition. In this study, compression spring was designed using high carbon steel, stainless steel and chrome vanadiu

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Salim, Nur Ashida, Muhammad Murtadha Othman, Ismail Musirin, and Mohd Salleh Serwan. "Critical System Cascading Collapse Assessment for Determining the Sensitive Transmission Lines and Severity of Total Loading Conditions." Mathematical Problems in Engineering 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/965628.

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This paper presents a computationally accurate technique used to determine the estimated average probability of a system cascading collapse considering the effect of hidden failure on a protection system. This includes an accurate calculation of the probability of hidden failure as it will give significant effect on the results of the estimated average probability of system cascading collapse. The estimated average probability of a system cascading collapse is then used to determine the severe loading condition contributing to a higher risk of a system cascading collapse. This information is i

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Gosal, Nelson, Iswandi Imran, and Muhammad Riyansyah. "Studies on nonlinear behavior of retrofitted reinforced concrete beam column joints after experiencing severe damage from earthquake load simulation." MATEC Web of Conferences 270 (2019): 01006. http://dx.doi.org/10.1051/matecconf/201927001006.

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For an earthquake resistant structure, reinforced concrete building must have certain performance level under certain level of earthquakes such as when it is subjected to a strong level earthquake, it may experience severe damages, but without partial or full collapse, thus some reparations could be done to recover the functions of those damaged structures. However, repairing methods were usually done to slightly-damaged structures, while for severely-damaged structures, more studies are still needed to optimize the effectivity of the repair. Therefore, the objective of this study is to evalua

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Rais-Rohani, Masoud, Christopher D. Eamon, and Amy L. Keesecker. "Structural Analysis and Sizing Optimization of a Composite Advanced Sail Design Concept." Marine Technology and SNAME News 42, no. 02 (2005): 61–70. http://dx.doi.org/10.5957/mt1.2005.42.2.61.

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Numerical design optimization coupled with finite-element analysis is applied to an advanced design concept for a submarine sail structure made of composite materials. Through a detailed design sensitivity analysis, the influence of stiffener and skin sizing on the weight and buckling characteristics of the sail structure is quantified. Furthermore, the sail is optimized for minimum weight under a severe loading condition based on two alternative discretization concepts for modeling the variations in skin thickness. The design constraints include the lower-bound limits on load factors correspo

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Kwon, In Kyu, and Young Bong Kwon. "Evaluation of the Fire Resistance of H-Section Steel Columns and Beams." Applied Mechanics and Materials 204-208 (October 2012): 3190–93. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.3190.

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Building fires can cause severe damages to not only human life but also building structures. Therefore, every nation requires a building regulation related to fire in aspect of safety of human and structural stability. The structural stability under fire condition can be evaluated by the fire test defined in each nation’s standard. However, the results from the test don’t satisfy the real situations of the building such as fire loads, opening size, loading and boundary condition of structural members, and etc. Meanwhile, performance based fire engineering design is regarded as an alternative e

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Cheng, Zhiping, Eric Tan, Minbo Cai, and Allan Ross Magee. "Concept design of a digital twin architecture for ship structural health management." Journal of Physics: Conference Series 2311, no. 1 (2022): 012010. http://dx.doi.org/10.1088/1742-6596/2311/1/012010.

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Abstract Ocean-going vessels frequently experience severe weather conditions. Occasionally, the actual environmental loads are much larger than design values, resulting in deviations from design conditions that may cause serious structural damage. A structural digital twin can enhance predictability and reliability of marine structures, and thus provide vessel operators, owners, and stakeholders with a more accurate overview of a vessel’s condition. It can also help reduce lifecycle costs through proposing rational and optimal inspection, maintenance, repair programs, and assist on maximizing

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Shen, Wen-long, Wen-bing Guo, Hua Nan, Chun Wang, Yi Tan, and Fa-qiang Su. "Experiment on Mine Ground Pressure of Stiff Coal-Pillar Entry Retaining under the Activation Condition of Hard Roof." Advances in Civil Engineering 2018 (October 18, 2018): 1–11. http://dx.doi.org/10.1155/2018/2629871.

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In mining excavation, the retained entry with stiff coal pillar is situated in the strong mine ground pressure. Influenced by mining abutment stress and dynamic stress (the vibration signal) induced from the hard roof activation, the retained entry may be subjected to roof separation, supporting body failure, severe floor heave, and even roof collapse. Based on a 2D physical model, an experimental method with plane-stress conditions was used to simulate the mechanical behavior of the rock strata during mining. In this experiment, three monitoring systems were adopted to reveal the characterist

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Zhang, Wang, Du, Lou, and Wang. "Failure and Seepage Characteristics of Gas-Bearing Coal under Accelerated Loading and Unloading Conditions." Applied Sciences 9, no. 23 (2019): 5141. http://dx.doi.org/10.3390/app9235141.

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In actual mining situations, the advancing speed of the working face is usually accelerated, which may affect the failure and seepage characteristics of gas-bearing coal, and may even induce dynamic disasters. In order to discover the effects of such accelerated advancement of the working face, an experimental study on the failure and seepage characteristics of gas-bearing coal under accelerated loading and unloading conditions was carried out in this work. The results showed that the energy release was more violent and impactful under accelerated loading and unloading paths. The time required

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Baragetti, S., and A. Baryshnikov. "Rotary Shouldered Thread Connections: Working Limits Under Combined Static Loading." Journal of Mechanical Design 123, no. 3 (2000): 456–63. http://dx.doi.org/10.1115/1.1371476.

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Rotary shouldered connections (RSC), used in the oil and gas industries, are probably the most stressed components of the drill string because they are subjected both to make-up torque and to axial and bending loads. Since loads can vary and can result in fatigue crack initiation and propagation, there is often severe damage to the first threads engaged. Such damage leads to shoulder load reduction and discontinuity in the drill string. Once we know the geometric dimensions and the materials of the pin and box elements composing the RSCs, API standards make it possible to evaluate the working

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