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Journal articles on the topic 'Natural and man-made loading'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Ashimova, А. А., Atac Bascetin, А. А. Bek, М. B. Nurpeisova, and Z. А. Yestemesov. "Creation of efficient technologies processing of man-made raw materials." Engineering Journal of Satbayev University 144, no. 1 (2022): 37–42. http://dx.doi.org/10.51301/ejsu.2022.i1.06.

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Industrial processing of technogenic raw materials (wastes of enrichment and processing, overburden and enclosing rocks, close in composition to natural and used in traditional areas, practically does not differ from industrial processing of natural mineral raw materials. Efficient technologies development for processing of technogenic raw materials, which make it possible to obtain competitive products from it for various industries, is urgent task. Article deals with development of solution compositions for strengthening and hardening quarry slopes. Rock mass hardening in weakened areas is a

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Camelbeeck, Thierry, Kris Vanneste, and Thomas Lecocq. "Natural and Man-induced Destructive Earthquakes in Stable Continental Regions." Bulletin des Séances - Mededelingen der Zittingen 63, no. 2 (2020): 321–40. https://doi.org/10.5281/zenodo.3894460.

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Despite the real societal challenge posed by their important potential of destruction, the infrequent moderate and large earthquakes in tectonically-stable continental regions (SCR) have causes that are not well understood yet. Nevertheless, recent studies suggest that large earthquakes in SCR can be explained by transient disturbances of local crustal stress or fault strength because the tectonic loading on faults is very slow. In this paper, we assert that this new hypothesis is well supported by the observation that many moderate MW 5.5-6.0 SCR earthquakes are shallower than similar events

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Menshov, O. "APPLICATION OF MAGNETIC METHODS FOR MONITORING NATURAL AND MAN-MADE PROCESSES ASSOCIATED WITH CRITICAL INFRASTRUCTURE OBJECTS." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 1 (84) (2019): 27–33. http://dx.doi.org/10.17721/1728-2713.84.04.

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Presented are the results of research studies with the attracting of the GIS and geophysical methods for solving the problems of monitoring of dangerous natural and man-made processes at the areas of the critical infrastructure objects location. The possible ways of the magnetic methods applied for the critical infrastructure objects monitoring were considered. The natural and man-made processes associated with the critical infrastructure were defined. Among them are the objects that can influence the changes in soils, atmospheric air composition, as well as near-surface geological horizons. T

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H. Nasution, B. Wirjosentono, T. Tamrin, H. Ismail, and D. A. Nasution. "THE EFFECTS OF SEPIOLITE LOADINGS ON MECHANICAL, THERMAL, AND MORPHOLOGICAL CHARACTERISTICS OF NATURAL RUBBER/EPOXIDISED NATURAL RUBBER (NR/ENR-25) BLENDS." RASAYAN Journal of Chemistry 18, no. 01 (2025): 61–65. https://doi.org/10.31788/rjc.2025.1819046.

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Sepiolite has been used widely as nanofillers to improve the properties and compatibility of rubber blends, and due to its magnesium silicate hydrates contents, the sepiolite may also function as a thermal stabilizer. These works investigate the effects of sepiolite loadings on curing, mechanical, thermal, and morphological characteristics of natural rubber/epoxidized natural rubber (NR/ENR-25) blends. The blends were made using a two-roll mill technique using standard vulcanization reagents of sulfur and carbon black as the main filler, and their vulcanization characteristics were investigate

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Murtazaev, S. A. Yu, S. G. Sheina, M. S. Saidumov, and I. S. A. Murtazaev. "Modern concrete composites for earthquake-resistant construction." Herald of Dagestan State Technical University. Technical Sciences 50, no. 4 (2024): 197–202. http://dx.doi.org/10.21822/2073-6185-2023-50-4-197-202.

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Objective. The purpose of the research is to develop earthquake-resistant building composites Method. The study is based on experimental dynamic testing of fine-grained concrete. Existing approaches to ensuring seismic safety of buildings and structures are analytically summarized. Result. Domestic and foreign experience in designing fine-grained concrete compositions for earthquake-resistant construction is presented. Compositions of fine-grained concrete of various classes were obtained using raw materials of natural and man-made origin. Recipes were proposed and their construction, technica

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Adams, Keith, David McGovern, Tiziana Rossetto, and Ian Chandler. "CONTRIBUTION OF MOMENTUM IN TSUNAMI LOADING ON A VERTICAL SEAWALL." Coastal Engineering Proceedings, no. 38 (May 29, 2025): 14. https://doi.org/10.9753/icce.v38.structures.14.

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Tsunami are often very long wavelength, long period gravity waves generated in deep water. Some of the largest and most damaging tsunami are associated with subduction zone ocean trenches and their related convergent plate boundaries such as the Aleutian Islands (1946), Chile (1960), Indian Ocean (2004) and Tohoku (2011) events. When tsunami approach the continental shelf, the wavelength decreases and wave height increases meaning man-made and natural coastal structures can be impacted by large amplitude waves imparting increased forces caused by a combination of hydrostatic and hydrodynamic c

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Papatzani, Styliani, Ioannis Giannakis, Sotirios A. Grammatikos, Michael D. Kotsovos, and Subrata Chandra Das. "Sustainable Reinforced Concrete Design of Structural Walls." Key Engineering Materials 891 (July 6, 2021): 218–22. http://dx.doi.org/10.4028/www.scientific.net/kem.891.218.

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Sustainability calls for reduction in the use of natural resources and man-made materials. In light of this, the present study demonstrates the potentials of the reduction of transverse reinforcement in structural walls. A structural wall 1.7 m long was designed following the Greek Code for Reinforced Concrete (GCRC). This wall was then constructed and tested under cyclic loading. The theoretical value of the uncracked stiffness was four times greater than the value calculated after the experiment. The wall was also designed according to the Compressive Force Path method (CFP), which allowed f

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Głuchowski, Andrzej, Katarzyna Gabryś, Emil Soból, Raimondas Šadzevičius, and Wojciech Sas. "Geotechnical Properties of Anthropogenic Soils in Road Engineering." Sustainability 12, no. 12 (2020): 4843. http://dx.doi.org/10.3390/su12124843.

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The construction of a roads network consumes high amounts of materials. The road materials are required to fulfill high standards like bearing capacity and low settlement susceptibility due to cyclic loading. Therefore, crushed aggregates are the primary subbase construction material. The material-intensity of road engineering leads to depletion of natural resources, and to avoid it, the alternative recycled materials are required to be applied to achieve sustainable development. The anthropogenic soils (AS), which are defined as man-made unbound aggregates, are the response to these requireme

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Oad, M., A. H. Buller, B. A. Memon, and N. A. Memon. "Impact of Long-Term Loading on Reinforced Concrete Beams Made with Partial Replacement of Coarse Aggregates with Recycled Aggregates from Old Concrete." Engineering, Technology & Applied Science Research 9, no. 1 (2019): 3818–21. http://dx.doi.org/10.48084/etasr.2498.

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This research work presents an experimental evaluation of the effect of sustained loading on reinforced concrete beams made with 50% replacement of natural coarse aggregates with aggregates from old concrete. A total of 9 RC beams were cast, 6 with natural coarse aggregates and 3 with recycled concrete aggregates. All beams were cured for 28 days in standard fashion. Among the first batch, 3 beams were used to test under short term loading till failure. An application of 50% of short-term loading followed on all beams assembled on purpose made frames. All beams were monitored for deflection, s

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Oad, Mahboob, Abdul Hafeez Buller, Bashir Ahmed Memon, and Noor Ahmed Memon. "Impact of Long-Term Loading on Reinforced Concrete Beams Made with Partial Replacement of Coarse Aggregates with Recycled Aggregates from Old Concrete." Engineering, Technology & Applied Science Research 9, no. 1 (2019): 3818–21. https://doi.org/10.5281/zenodo.2576317.

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This research work presents an experimental evaluation of the effect of sustained loading on reinforced concrete beams made with 50% replacement of natural coarse aggregates with aggregates from old concrete. A total of 9 RC beams were cast, 6 with natural coarse aggregates and 3 with recycled concrete aggregates. All beams were cured for 28 days in standard fashion. Among the first batch, 3 beams were used to test under short term loading till failure. An application of 50% of short-term loading followed on all beams assembled on purpose made frames. All beams were monitored for deflection, s

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Tse, Demiana, João M. Pereira, and Paulo B. Lourenço. "Numerical Analysis of an Earthen Masonry Structure Subjected to Blast Loading." CivilEng 2, no. 4 (2021): 969–85. http://dx.doi.org/10.3390/civileng2040052.

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Historic monuments and construction capture the knowledge of civilizations of the past and are a source of pride for people of the present. Over the centuries, these buildings have been at risk from natural and man-made causes. The Alhambra, a UNESCO World Heritage Site in Granada, Spain, is one of such places. This paper aims to evaluate the structural performance of the Torre de la Vela, a tower in the Alhambra, under blast loads. The loads were based on historical records of barrels of gunpowder and were modeled as simplified pressure profiles using existing empirical equations. The effect

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Pankaj, Singh*1 &. Vishakha M. Patel2. "PROGRESSIVE COLLAPSE OF TALL STRUCTURE THROUGH REMOVAL OF COLUMN UNDER SEISMIC LOADING." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 8, no. 6 (2019): 251–60. https://doi.org/10.5281/zenodo.3256161.

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Progressive collapse arises when local failure in a building member spreads to the adjacent members, this may promote further failure. In general, structures are designed to bear the normal expected loads like dead load, live load and lateral load (wind and seismic). However, some structures rarely are being exposed to sudden loads due to natural, man-made, intentional or unintentional reasons. These unexpected loads induce progressive collapse event. Therefore, many studies have been conducted to improve the building performance against extreme load hazards and progressive collapse phenomenon

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Bakai, A. V. "Implementation of microseismic monitoring for iron ore mines." IOP Conference Series: Earth and Environmental Science 1049, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1755-1315/1049/1/012007.

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Abstract The seismic station of the Subbot Institute of Geophysics of the NAS of Ukraine (IGP), in Kriviy Rih (Ukraine) ten earthquakes were registered from 2007 to 2013. Such activity is not typical for this region. One of the reasons is mining of mineral resources in this area, leading to irreversible changes in the stress-strain state of the massif, which activate dangerous natural and man-made processes (landslides, flooding, earthquakes, mountain strikes, etc.) The collapse of the mountain massif and the exit of the funnels occurs when the limit value of the loading in the massif is reach

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Zakirova, Gulnur, Evgeny Krapivsky, Anastasia Berezovskaya, and Artem Borisov. "Storage of Compressed Natural Gases." Energies 16, no. 20 (2023): 7208. http://dx.doi.org/10.3390/en16207208.

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The article analyzes the modern theory and practice of transportation and storage of compressed natural gas. The expediency of the inclusion of a floating storage berth for the loading of gas carriers and container ships into the infrastructure of marine transportation of compressed natural gas is considered. Requirements for storage berth are formulated. It is shown that without using a marine mooring storage facility, the loading time of a gas carrier will considerably increase, and the economic efficiency of compressed gas transportation will lower due to the considerable time of loading an

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Shmandiy, V. M., Elena V. Kharlamova, and T. E. Rigas. "CONTROL ELEMENTS OF ENVIRONMENTAL SAFETY UNDER THE CONDITIONS OF CHEMICAL AND MAN-MADE FACTORS." Hygiene and sanitation 97, no. 9 (2018): 809–12. http://dx.doi.org/10.18821/0016-9900-2018-97-9-809-812.

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The results of investigations are examined in terms of the development of custom ecological safety controls of the action of chemical and technogenic factors. The work is executed in the Department of Ecological Safety and Natural Management of Kremenchuk Mykhaylo Ostrohradskyi National University (Ukraine). The actuality of the theme is determined by insufficient knowledge of the simultaneous impact of factors of the formation of the ecological danger of different genesis, imperfection and the high cost of existing technical safety management tools. Research is conducted in the Kremenchug soc

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Asprone, Domenico, Fatemeh Jalayer, Andrea Prota, and Gaetano Manfredi. "Performance of Different Seismic Retrofitting Techniques in Case of Blast-Induced Progressive Collapse." Applied Mechanics and Materials 82 (July 2011): 485–90. http://dx.doi.org/10.4028/www.scientific.net/amm.82.485.

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Extreme loading conditions such as man-made malicious actions, fires or natural events could induce local failure mechanisms (e.g., a loss of a member) which may trigger progressive collapse. The design or the assessment of a critical infrastructure needs to address the possibility of such an extreme circumstance taking place during its effective life-time. It is observed that blast-induced progressive collapse mechanisms involve non-linear structural behavior similar to that due to earthquakes. This work focuses on probabilistic analysis of progressive collapse of a typical RC structure, indu

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Oad, M., B. A. Memon, A. H. Buller, and N. A. Memon. "Flexural Behavior of RC Beams Made with Recycled Aggregates Under 12-Month Long Term Loading." Engineering, Technology & Applied Science Research 9, no. 5 (2019): 4631–35. http://dx.doi.org/10.48084/etasr.3013.

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In the present era of infrastructure development, demolishing waste management poses serious problems, particularly in urban centers. Vast development requires huge amounts of conventional concrete aggregates resulting in serious environmental problems. Therefore, efforts are carried out in utilizing demolishing waste, particularly demolishing concrete as coarse aggregates used in new concrete. This article presents laboratory investigations of flexural behavior of reinforced concrete beams made with partial replacement of natural coarse aggregates with coarse aggregates from demolished concre

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Oad, Mahboob, Bashir Ahmed Memon, Abdul Hafeez Buller, and Noor Ahmed Memon. "Flexural Behavior of RC Beams Made with Recycled Aggregates Under 12-Month Long Term Loading." Engineering, Technology & Applied Science Research 9, no. 5 (2019): 4631–35. https://doi.org/10.5281/zenodo.3510150.

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In the present era of infrastructure development, demolishing waste management poses serious problems, particularly in urban centers. Vast development requires huge amounts of conventional concrete aggregates resulting in serious environmental problems. Therefore, efforts are carried out in utilizing demolishing waste, particularly demolishing concrete as coarse aggregates used in new concrete. This article presents laboratory investigations of flexural behavior of reinforced concrete beams made with partial replacement of natural coarse aggregates with coarse aggregates from demolished concre

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MC, Nandini. "Studies on Mechanical and Flexural Strength of Carbon Nano Tube Reinforced with Hemp/Vinyl Ester/Carbon Fiber Laminated Hybrid Composite." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (2021): 699–708. http://dx.doi.org/10.22214/ijraset.2021.38035.

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Abstract: In Recent days, the natural fibres from renewable natural resources offer the potential to act as a reinforcing material for polymer composites alternative to the use of glass, carbon and other man-made fibres. Among various fibres, Hemp is most widely used natural fibre due to its advantages like easy availability, low density, low production cost and satisfactory mechanical properties. Composite materials play a vital role in the field of materials to meet the stringent demands of light weight, high strength, corrosion resistance and near-net shapes. Composite is a structural mater

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Dr., G. Purushotham, and K. L. Yathin. "Study of Mechanical Behavior for Tamarind Shell Powder and Coconut Coir Fiber Epoxy Composite for Aerospace Application." International Journal of Trend in Scientific Research and Development 3, no. 1 (2018): 941–49. https://doi.org/10.31142/ijtsrd19159.

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Now a days, the natural fibres from renewable natural resources offer the potential to act as a reinforcing material for polymer composites alternative to the use of glass, carbon and other man made fibres. Among various fibres, coir is most widely used natural fiber due to its advantages like easy availability, low density, low production cost and satisfactory mechanical properties. For a composite material, its mechanical behavior depends on many factors such as fiber content, orientation, types, length etc. Natural fibre composites NFC are gaining interest in manufacturing because they addr

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Aadars.M.S. "Mechanical Behaviour of E-Glass and Chicken Feather Composite." Research and Reviews on Experimental and Applied Mechanics 4, no. 1 (2021): 1–7. https://doi.org/10.5281/zenodo.4956171.

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<em>Now-a-days, the natural fibers from renewable natural resources provide the ability to act as reinforcing polymers that differ from the use of glass, carbon and other man-made fibers. Among various fibers, jute is most widely used natural fiber due to its advantages like easy availability, low density, low production cost and satisfactory mechanical properties. For the composite material, its mechanical performance depends on many factors such as fiber content, shape, type, length etc. This research project was conducted to study the effect of fiber loading and adaptation to the physical a

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Abdul Wahab, Nor Mazlina, Aztikah Azman, Noor Aishatun Majid, Sharifah Nafisah Syed Ismail, and Mohd Syamaizar Mustafa. "Effect of Marble Tile Waste Powder (MTWP) Filler on Cure and Mechanical Behaviour of Natural Nubber (NR) Compound." Jurnal Intelek 14, no. 2 (2019): 220–29. http://dx.doi.org/10.24191/ji.v14i2.238.

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As part of the increasing effort to reutilize of residue generated from industrial activities, an attempt hasbeen made to utilize marble tile waste as a potential filler in natural rubber (NR) composite when lowstrength applications are required. In the experimental part, 10 μm size of marble tile waste powder(MTWP), with five different loadings up to 40 parts per hundred of rubber (phr) were used in NRcomposites to study the effect of MTWP loading on the cure characteristics and mechanical properties.The addition of MTWP as filler resulted in shorter cure time and scorch time which is prefera

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Xu, Yanrong, C. F. Leung, Jian Yu, and Wenwu Chen. "Centrifuge model study on settlement of strip footing subject to rising water table in loess." Canadian Geotechnical Journal 57, no. 7 (2020): 992–1005. http://dx.doi.org/10.1139/cgj-2018-0337.

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Owing to man-made activities and natural conditions, the groundwater table experiences considerable changes in Lanzhou. Centrifugal model tests were performed to investigate the settlement of strip footings on loess subject to rising water table under different foundation pressures. The air-fall method was employed to reconstitute the artificial loess samples. The applicability of the air-fall prepared samples was evaluated against the parameters of the undisturbed loess samples obtained from the same location. The results of centrifuge tests reveal that the footing settlement increases signif

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Soroush, Abbas, and Hossein Soltani-Jigheh. "Pre- and post-cyclic behavior of mixed clayey soils." Canadian Geotechnical Journal 46, no. 2 (2009): 115–28. http://dx.doi.org/10.1139/t08-109.

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Soil structures are often comprised or supported by soils that are mixtures of cohesive and granular geomaterials. These soils are termed as intermediate or mixed soils and are widely found in natural deposits and man-made soil structures. The objective of this paper is to study the behavior of mixed clayey soils under monotonic, cyclic, and post-cyclic monotonic loading, with the main focus on the last of these three. For this purpose, a number of strain-controlled monotonic, cyclic, and post-cyclic triaxial compression tests were carried out on “clay–sand” and “clay–gravel” mixtures in undra

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Blinkov, Pavel, Leonid Ogorodov, and Peter Grabovyy. "Failure of structural elements made of polymer supported composite materials during the multiyear natural aging." E3S Web of Conferences 33 (2018): 02009. http://dx.doi.org/10.1051/e3sconf/20183302009.

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Modern high-rise construction introduces a number of limitations and tasks. In addition to durability, comfort and profitability, projects should take into account energy efficiency and environmental problems. Polymer building materials are used as substitutes for materials such as brick, concrete, metal, wood and glass, and in addition to traditional materials. Plastic materials are light, can be formed into complex shapes, durable and low, and also possess a wide range of properties. Plastic materials are available in various forms, colors and textures and require minimal or no color. They a

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Emelya Khoesoema, Erick Kamil, and Hamidah Harahap. "PENGARUH PENCUACAAN ALAMI TERHADAP PRODUK LATEKS KARET ALAM BERPENGISI TEPUNG KULIT PISANG YANG DIPUTIHKAN DENGAN HIDROGEN PEROKSIDA." Jurnal Teknik Kimia USU 1, no. 2 (2012): 16–20. http://dx.doi.org/10.32734/jtk.v1i2.1412.

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The effect of exposing bleached banana skin powder-filled natural rubber products to sun light and weather with variation of bleached banana skin powder filler loading. Banana skin powder was dried and bleached with hydrogen peroxide and made into disperse system. Natural rubber latex was compounded with bleached banana skin powder with filler loading of 0 to 20 phr (per hundred rubber). Natural rubber latex products, which were produced, were hung in air and exposed to sun light and weather. The degradation of bleached banana skin powder-filled natural rubber products were evaluated by calcul

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Mazzolani, Federico M. "Urban Habitat Constructions under Catastrophic Events: The COST C26 Action." Applied Mechanics and Materials 82 (July 2011): 15–25. http://dx.doi.org/10.4028/www.scientific.net/amm.82.15.

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The main objective of the international research project (COST C26 Action, Chairman F.M. Mazzolani) dealing with “Urban Habitat Constructions under Catastrophic Events” (2006 – 2010) was to increase the knowledge on the behaviour of constructions located in urban habitat and subjected to both natural and/or man-made catastrophic events, such as earthquakes, fire, wind storms, heavy snow loading, gas explosions, accidental impact from vehicles out of control and occasionally due to bomb blasts during terrorist attacks. In this view, it has been planned to define suitable tools for predicting th

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Cavalié, O., A. Sladen, and M. Kelner. "Detailed quantification of delta subsidence, compaction and interaction with man-made structures: the case of the NCA airport, France." Natural Hazards and Earth System Sciences 15, no. 9 (2015): 1973–84. http://dx.doi.org/10.5194/nhess-15-1973-2015.

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Abstract. River deltas are dynamic coastal systems and their evolutions are closely monitored as it often concentrates vital natural resources for the surrounding areas. Many deltas worldwide experience subsidence due to geological processes (sediment loading and compaction) or human activities (groundwater or hydrocarbon extraction, land reclamation). This causes shoreline erosion or wetland loss which represent serious issues for the population. In this study we investigate the dynamic of the Var delta (France) where reclaimed lands over sea have been built to host the Nice côte d'Azur airpo

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Cavalié, O., A. Sladen, and M. Kelner. "Detailed quantification of delta subsidence, compaction and interaction with man-made structures: the case of the NCA airport, France." Natural Hazards and Earth System Sciences Discussions 3, no. 6 (2015): 3761–88. http://dx.doi.org/10.5194/nhessd-3-3761-2015.

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Abstract. River deltas are dynamic costal systems and their evolutions are closely monitored as it often concentrates vital natural resources for the surrounding areas. Many deltas, worldwide, experience subsidence due to geological processes (sediment loading and compaction) or human activities (groundwater or hydrocarbon extraction, land reclamation). This causes shoreline erosion or wetland loss which represent serious issues for the population. In this study, we investigate the dynamic of the Var delta (France) where reclaimed lands over sea have been built to host the Nice côte d'Azur air

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Ramirez Cadavid, David A., Rick R. Layman, Thomas Nishino, J. Lauren Slutzky, Zhenyu Li, and Katrina Cornish. "Guayule Natural Rubber Latex and Bi2O3 Films for X-ray Attenuating Medical Gloves." Materials 15, no. 3 (2022): 1184. http://dx.doi.org/10.3390/ma15031184.

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Existing natural latex radiation-attenuating gloves (RAGs) contain a high loading of radiation attenuation filler that reduces their mechanical properties to below Food and Drug Administration (FDA) medical glove requirements. RAGs are commonly formulated using Hevea natural rubber latex and lead-based fillers. The former can cause life-threatening allergic responses and the latter are known for their toxicity. In this work, a new lead-free RAG formulation based on circumallergenic guayule natural rubber latex (GNRL) and non-toxic radiation attenuation filler bismuth trioxide (Bi2O3) was devel

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Mirka, Gary A., GwanSeob Shin, Kristen Kucera, and Dana Loomis. "Use of the Cabs Methodology to Assess Biomechanical Stress in Commercial Crab Fishermen." Proceedings of the Human Factors and Ergonomics Society Annual Meeting 46, no. 13 (2002): 1152–56. http://dx.doi.org/10.1177/154193120204601331.

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Commercial fishing is a job characterized by long hours in an unpredictable natural environment and variable demands placed on the musculoskeletal system, requiring strength, coordination, and endurance. The focus of this project was in the quantification of the biomechanical stresses placed on the lumbar spine during the work activities of commercial crab fishermen. The Continuous Assessment of Back Stress (CABS) methodology was used to develop distributions describing the amount of time that each of the three workers on a three-man crabbing crew spend at various levels of spine stress. The r

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Qu, Kai, Xue-wen Xu, Jin-fei Li, and Wei-wei Lu. "Research on Fatigue Characteristics of Bonding interface of Solid Rocket Motor Propellant." Journal of Physics: Conference Series 2252, no. 1 (2022): 012038. http://dx.doi.org/10.1088/1742-6596/2252/1/012038.

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Abstract With the continuous expansion of the combat mission of the Chinese Navy, the solid rocket motor will be on duty at sea for a long time. During the service period of solid rocket motor, the bonding interface will bear a large number of cyclic fatigue loads. According to the design test, the influence of the strain amplitude and frequency of loading on the bonding interface was studied. The results show that the cyclic loading frequency made no difference on the cyclic damage number in the high frequency. The natural logarithm of the cyclic loading times and cyclic loading accord with l

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Qu, Kai, Xue-wen Xu, Jin-fei Li, and Wei-wei Lu. "Research on Fatigue Characteristics of Bonding interface of Solid Rocket Motor Propellant." Journal of Physics: Conference Series 2252, no. 1 (2022): 012038. http://dx.doi.org/10.1088/1742-6596/2252/1/012038.

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Abstract With the continuous expansion of the combat mission of the Chinese Navy, the solid rocket motor will be on duty at sea for a long time. During the service period of solid rocket motor, the bonding interface will bear a large number of cyclic fatigue loads. According to the design test, the influence of the strain amplitude and frequency of loading on the bonding interface was studied. The results show that the cyclic loading frequency made no difference on the cyclic damage number in the high frequency. The natural logarithm of the cyclic loading times and cyclic loading accord with l

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Shakirova, Oksana. "RELATIONSHIP BETWEEN WOOD PROPERTIES AND DEFORMATIVITY UNDER DIFFERENT LOADING MODES." Forestry Engineering Journal 11, no. 1 (2021): 101–10. http://dx.doi.org/10.34220/issn.2222-7962/2021.1/9.

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Modification of wood by pressing makes it possible to obtain a durable material from low-quality wood species. The relationship between the structure of natural and pressed wood and deformability was investigated in the works of B.I. Ogarkov, P.P. Erinsh, V.A. Shamaev, G.K. Gavrilov. Meanwhile, at present wood is subjected to deformation in a plasticized state, the structure and properties of which are different from the structure of natural wood. In this work, an attempt to establish the relationship between the structure of natural and plasticized wood and its main, deformative indicators (s

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Li, Qian Qian, Li Xin Liu, and Sheng Dong He. "Experimental Study on Fatigue Behavior of Prestressed Concrete Beams with Manufactured Sand." Key Engineering Materials 517 (June 2012): 595–600. http://dx.doi.org/10.4028/www.scientific.net/kem.517.595.

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This paper presents the test results of 2 prestressed concrete beams with manufactured sand under cyclic loading, the concrete is made of manufactured sand to replace natural sand with different replacement rates of 50% and 100%. The stress of re-bars and prestressed strands and the strain of manufactured sand concrete are discussed, the rigidity and cracking of the prestressed beams under cyclic loading are analyzed, and the flexural behavior of the beams after 2.5 million times cyclic loading are also discussed and analyzed. The results show that the fatigue behavior of the prestressed concr

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Zavhorodniy, Serhii, and Vasyl Redchenko. "DYNAMIC TESTING OF BRIDGES WITH IMPULSE LOADING." Dorogi i mosti 2023, no. 28 (2023): 185–94. http://dx.doi.org/10.36100/dorogimosti2023.28.185.

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Introduction. This article deals with the practice of applying the method of dynamic testing of bridges, namely, modal control using impulse loading. The possibilities of this method for determining the technical condition of a bridge span structure by determining its natural characteristics: actual stiffness and parameters of natural vibration forms are shown. Problem Statement. The article is devoted to the problem of practical implementation of the latest theoretical developments in the field of diagnostics of the technical condition of road bridges by conducting full-scale dynamic tests. P

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Hassan, Medhat M., Khaled F. El-Nemr, and Anhar A. Abd El-Megeed. "Effect of gamma radiation on physico-mechanical properties of vulcanized natural rubber/carbon fiber composites." Journal of Elastomers & Plastics 48, no. 8 (2016): 677–90. http://dx.doi.org/10.1177/0095244315613622.

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Natural rubber was reinforced with a short carbon fibers (SCFs) at different concentrations (0–20 part per hundred part of rubber (phr)). The composites were vulcanized by sulfur, then subjected to gamma radiation at different doses up to 40 kGy. Physico-mechanical properties of composites were studied. Also, thermogravimetric analysis was used to investigate the influence of the incorporation of SCF on the thermal properties of prepared composites. It was observed that the mechanical properties like tensile strength increases with increasing irradiation dose up to 30 kGy and fiber loading up

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Katzenbach, Anne, Istabrak Dörsam, Helmut Stark, Christoph Bourauel, and Ludger Keilig. "Fatigue behaviour of dental crowns made from a novel high-performance polymer PEKK." Clinical Oral Investigations 25, no. 8 (2021): 4895–905. http://dx.doi.org/10.1007/s00784-021-03797-9.

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Abstract Objectives The aim of this study was, firstly, to analyse the long-time fatigue behaviour of crowns constructed from a novel polyetherketoneketone (PEKK) polymer, using artificial prepared teeth. Secondly, to determine the effect of the material’s stiffness that used as an artificial prepared tooth on the fatigue life of the PEKK crowns in comparison to human prepared teeth. Methods Veneered crowns with a PEKK framework were constructed on three different prepared teeth: artificial polymethyl methacrylate (PMMA) teeth, artificial CoCr teeth and extracted human teeth. As far as applica

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Polyakova, Irina, Raikhan Imambayeva, and Bakyt Aubakirova. "Determining the dynamic characteristics of elastic shell structures." Eastern-European Journal of Enterprise Technologies 6, no. 7 (114) (2021): 43–51. http://dx.doi.org/10.15587/1729-4061.2021.245885.

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Building structures are very often operated under the action of dynamic loads, both natural and man-made. The calculation of structures under the influence of static loads has been quite widely studied in detail. When structures are exposed to dynamic loads, additional tests are carried out, where measuring instruments are installed on the structures to register stresses and deformations that occur during dynamic influences. Elastic elements are the responsible functional unit of many measuring instruments. Therefore, the quality of elastic elements ensures the operational stability of the ent

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Irina, Polyakova, Imambayeva Raikhan, and Aubakirova Bakyt. "Determining the dynamic characteristics of elastic shell structures." Eastern-European Journal of Enterprise Technologies 6, no. 7 (114) (2021): 43–51. https://doi.org/10.15587/1729-4061.2021.245885.

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Building structures are very often operated under the action of dynamic loads, both natural and man-made. The calculation of structures under the influence of static loads has been quite widely studied in detail. When structures are exposed to dynamic loads, additional tests are carried out, where measuring instruments are installed on the structures to register stresses and deformations that occur during dynamic influences. Elastic elements are the responsible functional unit of many measuring instruments. Therefore, the quality of elastic elements ensures the operational stability of the ent

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Han, Jing Jing, Bao Xian Liu, and Dong Liang Zhang. "Stability Analysis of S-RMS under Seismic Loading." Advanced Materials Research 261-263 (May 2011): 1336–40. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.1336.

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Earthquake is one of the main geological disasters that cause slope instability. The stability analysis of soil-rock mixture slope under earthquake is made with FLAC3D in this paper. According to finding the shear strain concentrated deformation zone and the size of the displacement, they can help us to find the possible instability of the scope and location. The study result shows that the slope is stable in the natural state and certain displacement would occur in the potential slide mass of the slope under earthquake, and this must be taken into serious consideration in practical engineerin

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Annamalai, Saravanan, Suresh Periyakgoundar, Kumaravel Paramasivam, and Aravindha Balaji Selvaraj. "Investigation of Bending, Sound Absorption, and Damping Properties of AZ91D-Swivel Plate." Advances in Materials Science and Engineering 2020 (May 22, 2020): 1–13. http://dx.doi.org/10.1155/2020/9621921.

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A comparison was made between Mg alloy and A3 steel on weight, bending, sound absorption, and vibration conditions. In this study, a swivel plate, which is used in rotating car seats, is to be taken into consideration for finding bending, natural frequency, and frequency under static loading conditions. The swivel plate is generally made up of A3 steel plate; instead, we have replaced that with Mg alloy (AZ91D) plate. Stiffness, flexural strength, natural frequency, frequency under different static loading conditions, and sound absorption capacity were obtained through experimental methods. Fi

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Doss, Daniel Adrian, David Mcelreath, Rebecca Goza, Raymond Tesiero, Balakrishna Gokaraju, and Russ Henley. "Assessing the Recovery Aftermaths of Selected Disasters in the Gulf of Mexico." Logistics & Sustainable Transport 9, no. 1 (2018): 1–10. http://dx.doi.org/10.2478/jlst-2018-0001.

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AbstractThis research examined quantitatively in-port grain loading levels during the periods preceding and succeeding selected human-made and natural disasters among U.S. Gulf Coast ports. The array of selected disasters consisted of the 2010 British Petroleum oil spill, the 2011 Mississippi River flood, Hurricane Katrina, Hurricane Gustav, and Hurricane Isaac. The outcomes of the analyses showed that the examined in-port Gulf Coast grain loading activities have not fully recovered and achieved the level of normalcy that existed before the examined cataclysms.

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Dudley, R., and R. Srygley. "FLIGHT PHYSIOLOGY OF NEOTROPICAL BUTTERFLIES: ALLOMETRY OF AIRSPEEDS DURING NATURAL FREE FLIGHT." Journal of Experimental Biology 191, no. 1 (1994): 125–39. http://dx.doi.org/10.1242/jeb.191.1.125.

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Airspeed measurements during natural free flight were made on a total of 270 neotropical butterflies representing 62 species. Morphological data were obtained from the same individuals for which airspeeds had been determined. Flight speed was positively correlated with body mass, thoracic mass and wing loading. Controlling for body mass, higher wing loadings were correlated with increased flight speed. Flight speed and wing aspect ratio were negatively correlated. No consistent correlations were found between airspeed and wing length, wing area or body length. Released butterflies and butterfl

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Gajdos, E., M. Sperl, Z. Slizkova, and M. Drdlova. "The effect of consolidation treatment on selected mechanical properties of sandstone." IOP Conference Series: Materials Science and Engineering 1205, no. 1 (2021): 012012. http://dx.doi.org/10.1088/1757-899x/1205/1/012012.

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Abstract An investigation was made into selected mechanical properties of sandstone of Božanov mining site in Czechia using both natural specimens of the sandstone and specimens impregnated with consolidants – liquid products aimed at improving strength and durability of degraded stones. Experiments in three-point bending of notched and cracked specimens made it possible to determine (i) the quasi-static notch toughness as well as the fracture toughness of specimens when they were subjected to static loading, and (ii) the impact fracture toughness and total energy of fracture when specimens we

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Tarichko, V. I. "Design and analysis of technical characteristics of a quick-release device for connecting the ropes ends for mobile ropeways." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 8, no. 2 (2022): 131–41. http://dx.doi.org/10.22281/2413-9920-2022-08-02-131-141.

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The quick-release devices of the ends of the carrying and traction ropes, which have the load capacity required by the tension condition of the rope system and a gentle mechanical effect on the structural elements of steel ropes, make it possible to ensure the rapid deployment and dismantling of mobile ropeways in the conditions of elimination of natural or man-made emergencies. The article discusses the design of the original device that provides a reliable and quick-release connection of the ends of the ropes, and also developed a mathematical model for predicting the load capacity of the sp

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Lytvynenko, M. I., O. I. Zaliubovska, M. G. Shcherban, T. I. Tiupka, V. V. Zlenko, and Yu N. Avidzba. "Scientific rationale of measures on prevention of pollution of surface water bodies in Kharkiv region." Експериментальна і клінічна медицина 82, no. 1 (2020): 99–105. http://dx.doi.org/10.35339/ekm.2019.01.15.

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Today, in Kharkiv region, most of the surface water bodies as a result of man-made and anthropogenic loading have lost their natural purity and the ability to self-purify. One of the features of water resources of the region is that the rivers, which serve as the main sources of water supply, are also used as receivers of treated wastewater. In order to analyze the state of pollution of the aquifer of Kharkiv region during 2007–2016, laboratory studies of water of surface water reservoirs of the 1st and 2nd categories were conducted and summarized. The researchers have found that over the past

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Yu, Xiaoming, Yinghua Yang, Yanxia Ji, and Lin Li. "Experimental Study on Static Performance of Deployable Bridge Based on Cable-Strengthened Scissor Structures." Advances in Civil Engineering 2021 (November 17, 2021): 1–11. http://dx.doi.org/10.1155/2021/4373486.

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The deployable bridge based on scissor structures is one of the effective methods to quickly restore traffic after natural and man-made disasters. Scissor structures have the advantages of high storage rate, lightweight, and convenient storage and transportation. However, when scissor structures are used as load-bearing structures, their stiffness and bearing capacity are low. In this study, a three-dimensional deployable bridge based on the cable-strengthened scissor structures was proposed. In addition to rapid expansion, steel cables were used to strengthen scissor structures to improve the

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He, Justin J., Douglas L. Van Bossuyt, and Anthony Pollman. "Experimental Validation of Systems Engineering Resilience Models for Islanded Microgrids." Systems 10, no. 6 (2022): 245. http://dx.doi.org/10.3390/systems10060245.

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Microgrids are used in many applications to power critical loads that have significant consequences if they lose power. Losing power to medical centers, water treatment plants, data centers, national defense installations, airports, and other critical infrastructure can cause loss of money and loss of life. Although such microgrids are generally reliable at providing stable power, their resilience to disruption can be poor. Common interruptions include natural disasters like earthquakes, and man-made causes such as cyber or physical attacks. Previous research into microgrid resilience evaluati

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Oksitania, Dilla Nandya, Erlina B, and Yulia Hesti. "The Analysis of Consincing Money Deposits in The State Court As A Form of Accountability of Land Liberation Land Loading In Sumatera Toll Road In Kalianda State Court." Jurnal Hukum Sasana 7, no. 1 (2021): 70–78. http://dx.doi.org/10.31599/sasana.v7i1.491.

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Land is the most important element for humans to live, this is because land is a place where natural and man-made resources grow and are also built. Indonesia even regulates land ownership through this Land Law so that land use or management can be carried out carefully in the present and in the future. Land issue is a problem that concerns the most basic rights of the people. If the person in possession of the receivable refuses payment from the debtor, then the party owed can make cash payment of the debt by offering a payment made by the bailiff accompanied by 2 (two) witnesses. If the debt

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