scholarly journals PREDICTION OF SERVICE LIFE OF STRUCTURES CONTAIN METAKAOLIN CONCRETE.

2021 ◽  
Vol 10 (2) ◽  
pp. 19-30
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Water Permeability ◽  
Life Prediction ◽  
Chloride Penetration ◽  
Economic Aspects ◽  
Total Cost ◽  
Physical And Chemical ◽  
Resistance Tests

This paper presents a specific case study for estimating the service life of structures contains Metakaolin concrete using the SA.Du2020 model. Reckoning the service life helps reinforce the discernibility of these buildings and controls some economic aspects. The case in consideration was applied to the data collected for a mix contains 15% Metakaolin. The physical and chemical features of metakaolin Concrete will be examined. Durability tests of metakaolin Concrete encompass chloride penetration, water permeability, abrasion, water absorption, bond resistance, corrosion resistance and concrete resistance tests. The results of the service life prediction provide a perspective for the expected life span of buildings of similar conditions. The total cost through the intended life has to be considered.

scholarly journals Proposal of a method for service life prediction of a concrete structure: a case study

2020 ◽  
Vol 73 (3) ◽  
pp. 311-317
Author(s):  
André Barros Bolzani Petersen ◽  
Felipe Mattos Albertini ◽  
Bernardo Fonseca Tutikian
Keyword(s):  
Service Life ◽  
Concrete Structure ◽  
Life Prediction ◽  
Service Life Prediction

Service Life Prediction of RC Member in Chloride Environments under Different Loading Level

2013 ◽  
Vol 438-439 ◽  
pp. 491-496
Author(s):  
Yun Fen Feng ◽  
Jin Xin Gong ◽  
Xiao Yan Yang ◽  
Qin Zhang
Keyword(s):  
Monte Carlo Simulation ◽  
Service Life ◽  
Life Prediction ◽  
Loading Condition ◽  
Model Error ◽  
Chloride Penetration ◽  
Reinforced Concrete Structures ◽  
Chloride Ingress ◽  
Probabilistic Framework ◽  
Flexural Member

Chloride ingress is a major factor affecting durability of reinforced concrete structures. In the present study, service life of a RC flexural member in chloride environments is predicted. First, model for service life is established considering model error and the coupling effects of loading condition and environmental factors on the chloride penetration. Then, service life is predicted in probabilistic framework of Monte Carlo simulation. The results show that the use of a lognormal distribution for the service life seems relevant; the service life shows a great scatterings.

scholarly journals DETERMINATION OF 120MM / 46A PREVENTIVE CARE INTERVALS FOR MINVET BOATS FOR INCREASING THE RELIABILITY OF THE SYSTEM

JOURNAL ASRO ◽  
2018 ◽  
Vol 9 (2) ◽  
pp. 11
Author(s):  
Sutrisno Sutrisno ◽  
Arief Saepullah ◽  
Setiawan Bernadi ◽  
Djoko Kriswanto
Keyword(s):  
Service Life ◽  
Preventive Care ◽  
Reliability Index ◽  
Objective Functions ◽  
Damage Distribution ◽  
Maintenance Costs ◽  
Total Cost ◽  
Optimal Maintenance

Most warships, especially corvette types, have a service life of more than twenty years. Intuitively it can be concluded that the components and equipment that have been installed are in the period of wear from the bathtub curve. This paper presents an alternative method in determining the optimum component maintenance intervals for weapons system equipment on ships that have entered wear (wear out). Optimum maintenance costs are determined by optimizing the component maintenance interval with objective functions to minimize the total cost of increasing reliability. The reliability of the system is achieved by increasing the reliability index of its constituent components. Weibull ++ is used to obtain parameters that are appropriate for each damage distribution, while Excel Solvers are used to calculating optimal maintenance intervals. In this writing, a case study will be carried out on the components of Bofors cannon laying gear TAK 120MM / 46A

BRUSH PHOSPHOR BRONZE

Alloy Digest ◽  
1986 ◽  
Vol 35 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Heat Treating ◽  
Thermally Treated

Abstract BRUSH PHOSPHOR BRONZE is precision rolled and thermally treated to produce a material with consistent formability and properties. The product offers design advantages, improved service life and reduced fabrication problems. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, joining, and surface treatment. Filing Code: Cu-516. Producer or source: Brush Wellman Inc..

AW-TEN

Alloy Digest ◽  
1966 ◽  
Vol 15 (8) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Service Life ◽  
Yield Strength ◽  
High Strength ◽  
Heat Treating ◽  
Bend Strength ◽  
Steel Company ◽  
Superior Corrosion Resistance ◽  
Minimum Yield

Abstract AW-TEN is a high-strength structural steel offering 50,000 psi minimum yield strength, good formability and weldability, and superior corrosion resistance. It is intended primarily for weight reduction and longer service life. It is recommended for automobile and truck bodies, buildings, bridges, railway cars, booms, etc. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and compressive and bend strength as well as fracture toughness and fatigue. It also includes information on forming, heat treating, machining, and joining. Filing Code: SA-199. Producer or source: Alan Wood Steel Company.

Hybrid remaining useful life prediction method. A case study on railway D-cables

2021 ◽  
pp. 107746
Author(s):  
Yu Zang ◽  
Wei Shangguan ◽  
Baigen Cai ◽  
Huasheng Wang ◽  
Michael. G. Pecht
Keyword(s):  
Life Prediction ◽  
Prediction Method ◽  
Remaining Useful Life ◽  
Useful Life

scholarly journals Critical Review of Polymeric Building Envelope Materials: Degradation, Durability and Service Life Prediction

Buildings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 299
Author(s):  
Marzieh Riahinezhad ◽  
Madeleine Hallman ◽  
J-F. Masson
Keyword(s):  
Climate Change ◽  
Service Life ◽  
Critical Review ◽  
Life Prediction ◽  
Building Envelope ◽  
Service Life Prediction ◽  
Degradation Mechanisms ◽  
Material Component ◽  
Aging Conditions ◽  
Environmentally Sound

This paper provides a critical review of the degradation, durability and service life prediction (SLP) of polymeric building envelope materials (BEMs), namely, claddings, air/vapour barriers, insulations, sealants, gaskets and fenestration. The rate of material deterioration and properties determine the usefulness of a product; therefore, knowledge of the significant degradation mechanisms in play for BEMs is key to the design of proper SLP methods. SLP seeks to estimate the life expectancy of a material/component exposed to in-service conditions. This topic is especially important with respect to the potential impacts of climate change. The surrounding environment of a building dictates the degradation mechanisms in play, and as climate change progresses, material aging conditions become more unpredictable. This can result in unexpected changes and/or damages to BEMs, and shorter than expected SL. The development of more comprehensive SLP methods is economically and environmentally sound, and it will provide more confidence, comfort and safety to all building users. The goal of this paper is to review the existing literature in order to identify the knowledge gaps and provide suggestions to address these gaps in light of the rapidly evolving climate.

Energy saving in the tissue industry: technical and economic aspects of a case study

2006 ◽  
Vol 14 (2) ◽  
pp. 185-193 ◽  
Author(s):  
R. Gabbrielli ◽  
C. Medeot ◽  
D. Miconi
Keyword(s):  
Energy Saving ◽  
Economic Aspects

scholarly journals Preparation and Properties of Mo Coating on H13 Steel by Electro Spark Deposition Process

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3700
Author(s):  
Wenquan Wang ◽  
Ming Du ◽  
Xinge Zhang ◽  
Chengqun Luan ◽  
Yingtao Tian
Keyword(s):  
Corrosion Resistance ◽  
Service Life ◽  
Deposition Time ◽  
Deposition Process ◽  
H13 Steel ◽  
Carbide Phases ◽  
Metallurgical Bonding ◽  
Wear And Corrosion ◽  
Deposition Power ◽  
Wear And Corrosion Resistance

H13 steel is often damaged by wear, erosion, and thermal fatigue. It is one of the essential methods to improve the service life of H13 steel by preparing a coating on it. Due to the advantages of high melting point, good wear, and corrosion resistance of Mo, Mo coating was fabricated on H13 steel by electro spark deposition (ESD) process in this study. The influences of the depositing parameters (deposition power, discharge frequency, and specific deposition time) on the roughness of the coating, thickness, and properties were investigated in detail. The optimized depositing parameters were obtained by comparing roughness, thickness, and crack performance of the coating. The results show that the cross-section of the coating mainly consisted of strengthening zone and transition zone. Metallurgical bonding was formed between the coating and substrate. The Mo coating mainly consisted of Fe9.7Mo0.3, Fe-Cr, FeMo, and Fe2Mo cemented carbide phases, and an amorphous phase. The Mo coating had better microhardness, wear, and corrosion resistance than substrate, which could significantly improve the service life of the H13 steel.

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