Search:

  • Factors affecting the mechanical properties of

Search Options

Sort by:

Publication Type:

Open access:

Publication Date:

Periodicals:

Search results

Online since: October 2012
Authors: Jian Ren Zhang, Ke Bo Zhang, Bin Liu, Zhi Zhang
Introduction Predicting the remaining bearing capacity of corroded RC members serves as a vital factor to assess the durability and longevity of a reinforced concrete (RC) structure.
Also the theory of limit equilibrium was applied during analysis to yield the final conclusion.According to Higgins and Farrow's[3]research on how the stirrrup corrosion degree under different stirrup ratio affect test beam, they concluded that the check of appearance damage can't be the sufficient condition for distinguishing the structure properties of corroded RC beam,and they also indicated that the conditions of local corrosion of stirrups in different positions had great influence on distinguishing the structure properties of corroded RC beam.Another approach was developed by Zhao and Jin[4], where the previous conclusions on this issue were discussed and evaluated.
By considering the influence of steel bar corrosion on their cross-section and mechanical properties, as well as the reduction of the effective section area of the concrete, a shearing capacity assessment formula of RC beams with corrosion stirrups is proposed based on the shear capacity formula given by the actual Chinese code for the design of concrete structures(GB50010-2002).
After reaching the ultimate shear strength, the stirrups and oblique bars yield , therefore ,, combined with equation (1) , the shear force is present with (5) where is the angel between diagonal crake and horizontal directivity, and is affected by the oblique stress of the concrete .
Online since: February 2016
Authors: Anatoly Druzhinin, Valery Yerokhov, Stepan Nichkalo, Yevhen Berezhanskyi
However, more efficient methods of mechanical structuring of silicon surface affect the prime cost of solar cells.
The investigation of optical properties of obtained textures was performed using a Specord Plus spectrophotometer. 3.
Models of textures were chosen based on the condition of multiple reflection of light within the created textured layers, which would increase antireflective properties of the solar cell surface.
Fig. 4 shows the results of optimization of antireflective properties of obtained textures.
Koretskii, Properties of low-dimentional polysilicon in SOI structures for low temperature sensors, Advanced Materials Research 854 (2014) 49-55
Online since: August 2019
Authors: Elizaldo Domingues dos Santos, Liércio André Isoldi, Antônio José da Silva Neto, Gill Velleda Gonzales, Luiz Alberto Oliveira Rocha
Here parameters as mutation operator (M), crossover constant (CR), differential amplification factor (F), Population Size (PS) and Generations number (G) are evaluated.
Results indicated that the crossover constant (CR) and amplification factor (F) are important parameters for suitable prediction of the effect of degrees of freedom over thermal performance.
In this study, it was showed that one configuration parameter of the method can strongly affect the influence of geometry over thermal performance of the intruded cavity.
Some advantages of this method are the few number of control parameters, adaptability to parallel processes and good convergence properties [17].
In the present work, four different version of DE algorithm was executed with different parameters of mutation (MR), crossover (CR) and amplification factor (F).
Online since: May 2019
Authors: Olga Vyacheslavovna Chumakova
At the same time, the temperature increase (depending on different conditions – the magnitude of the fire load, the factors of the microclimate of the room, etc.) sometimes differs from the conditions of the standard mode, so in this work, when studying the process of self-ignition of wood samples, we considered several modes of increasing the temperature over time.
Extractive substances are involved in the formation of coke, affect the formation of smoke.
In order to better study the properties of fire danger of wood, it is necessary to continue testing with other types of hardwood, as well as to study the possibility of reducing the fire danger of wood samples by applying to their surface flame retardants made from available components.
Study of the effect of flame retardant on the properties of wood materials.
Engineering formation of a nuclear power plant safety system // (2018) International Journal of Mechanical Engineering and Technology, 9 (10), pp. 1406-1414 [9] Abramov R.A.
Online since: July 2015
Authors: Sergiy V. Divinski
An overview of current understanding of diffusion properties of grain boundaries in severely deformed materials is presented.
Below diffusion properties and the effect of SPD-processing on some of these short-circuit paths are analyzed in more detail.
Do twin boundaries produced during severe deformation reveal similar properties?
The diffusion properties of teh recrystallization front were measured in specially designed experiments [26, 48].
Deformation conditions of ECAP processing affect the percolating porosity.
Online since: March 2021
Authors: Halla Jasem Mohamad, Mohamad Najim Mahmood
Generally speaking, from the previous critical review, it can be stated that using LRB as a base isolators affects the dynamic response of RC buildings causes a rise in the natural period, roof displacement and a reduction in the roof acceleration, base shear and storey drift ratio.
At the two ends of the columns, the nonlinear hinge properties are assigned (P-M2-M3) hinges, these are based on the concrete compressive strength (fc’=40MPa) and steel yielding stress (fy=400MPa).
Contents Description 1 Type of structure Multi-storey RC building 2 Number of storey G+11 3 Floor Height 3m 4 Concrete Wall thickness (Elevators) 250mm 5 Flat Slab thickness 220mm 6 Dead load 2.5kN/m2 7 Live load 2 kN/m2 8 Live load on the roof 1.2kN/m2 9 External walls load 15kN/m 10 Internal walls load 12 kN/m 11 Response spectra (IS-code) As per IS 1893 (part 1) 2002 12 Importance factor (I) 1 Seismic zone V Response reduction factor (R) 5 Zone factor III (Z ) 0.36 13 Damping 5% Table 2 Section properties of the members Identification Storey number (1,2) Storey number (3,4,5,6) Storey number (7,8,9,10,11) Dimension (b*h)mm Main Reinf. ties Main Reinf. ties Main Reinf. ties C1 1000*250 12Ø25 Ø12@150 12Ø20 Ø12@150 10Ø20 Ø12@150 C2 675*375 12Ø25 Ø10@200 12Ø20 Ø10@200 10Ø20 Ø10@200 C3 1400*250 16Ø25 Ø12@100 16Ø20 Ø12@100 14Ø20 Ø12@100 C4 1200*250 18Ø25 Ø12@100 18Ø20 Ø12@100 10Ø25 Ø12@100 C5 875*400 16Ø25 Ø12@150 16Ø20 Ø12@150 14Ø20 Ø12@150 C6
Navodaya, Capacity Analysis of Rcc Frame Structure with and Without Infill Walls, Journal of Mechanical and Civil Engineering (JMCE), 14 (2017) 84-91
Online since: June 2018
Authors: Doru Michael Ştefănescu, Sung Bin Kim, Young Hoon Yim, Joong Mook Yoon
Introduction It is well established that high microporosity can result in dramatic deterioration of the mechanical properties, and in particular of fatigue properties.
Because of the complexity of the physics associated with microporosity formation, assessing the hierarchy of the process and material parameters that affect microporosity is not a trivial task.
(10) where A and Ke are the activity and equilibrium coefficient of pores respectively, and 101,325 is a unit transformation factor.
(13) where α is a transition factor from gas and melt mixture to pore, and Ptot is the total melt pressure on the pore calculated with Eq. 1.
The transition factor is evaluated by comparing model predictions with experiments.
Online since: August 2022
Authors: Mohd Najib Razali, Najmuddin Mohd Ramli, Mohamad Shafiq Mohd Razmi, Mohd Khairul Nizam
F1, F2, F3, and the commercial FGG recorded dropping points higher than 350 °C, indicating no dropping point properties for the tested greases.
The comparison was made to set a benchmark for the formulated FGG in terms of physical properties.
About 1 g of chitosan was added in the subsequent formulation to study the effect of chitosan on the properties of the FGG (F3).
The ability of lubricating grease to bleed oil, often known as “grease bleeding”, is one of the factors used to choose lubricating grease [17].
In conclusion, chitosan can be used as an additive to modify and improve the properties of FGG.
Online since: March 2015
Authors: Quan Jiang, Ping Zhao, Chun Zhi Zhao, Li Ping Ma
With comprehensive consideration of the current model study on LCA assessment indicators and the limitation of application scope as well as the key focuses of domestic and foreign policies, the production characteristics of exterior window materials, the direct correlation with the green building assessment and other relevant factors, this thesis mainly focuses on the non-renewable resource consumption (ADP), non-renewable energy consumption (PED), influence of greenhouse effect (GWP), acidification effect (AP), eutrophication (EP) and inhalable inorganics (RI).
As for southern regions mainly with air conditioner, the heat insulation performance of exterior window is the main factor o be considered, i.e. the provisions for shading coefficient of window are strict.
The relationship between indicators shall be comprehensively considered; this thesis does not analyze the scoring of each indicator at present and only proposes the factors that shall be considered in the selection of exterior window green materials.
Table 12 Assessment system for selection of exterior window green material Assess-ment on green- building materi-al used for exterior window Level 1 indicator Level 2 indicator Explanation of indicator Assessment standard Quality Dimension deviation Parameters of external information that may be directly observed “Graduations and Test Methods of Air Permeability Watertightness Wind Load Resistance Performance for Building External Windows and Doors” (GB/T 7106-2008) “The Graduation and Test for Airborne Sound Insulating Properties of Windows and Doors” (GB/T 8485-2008) “Graduation and Test Method for Thermal Insulating Properties of Doors and Windows” (GB/T 8484-2008) “Graduation and Test Method for Daylighting Properties of Windows” (GB/T 11976-2002) Wind load resistance Capacity for withstanding outside vertical wind load Watertightness Preventing rainwater or moisture indoor and/or outdoor entering into room when closed Airtightness Capacity for obstructing the ventilation of air
Cold Winter Zone” (JGJ 134-2010) “Design Standard for Energy Efficiency of Residential Buildings in Hot Summer and Warm Winter Zone” (JGJ 75-2012) “Optical Properties of Glass Curtain Walls” (GB 18091) Energy consumption in application Improving the energy conservation level of the building Heat transfer coefficient Reflecting the heat preservation and insulation performance Shading coefficient Reflecting the heat insulation performance Visible light transmittance Reflecting transparence Emission reduction Carbon dioxide emission Reducing carbon dioxide emission during exterior window production Safety Durability Resistance of exterior window for corrosion of natural conditions “Corrosion Tests in Artificial Atmospheres - General Requirement” (GB/T 14293-1998) “Methods of Exposure to Natural Weathering of Coating” (GB/T 9276-1996) “Test Methods on Mechanical and Weathering Properties for Unplasticized Polyvinyl Chloride (PVC-U) Doors and Windows” (GB/T 11793-2008) Flame resistance
Online since: October 2015
Authors: Leila Ebrahimi, Masoud Zare-Shehneh, Hadi Zare-Zardini, Farzad Ferdowsian, Adel Ghorani Azam, Safoura Soleymani, Mahtab Mofidi, Roya Rafati, Hossein Soltaninejad
Nanotechnology is a science to understand and employ the new properties of materials and systems at the nano-scale which shows effects of modern physics - mainly influenced by properties of quantum physics.
Biological properties of these materials were investigated by various research groups.
Different factors influence the antimicrobial activities of CNTs.
Meeks, Ectopic pregnancy: History, incidence, epidemiology, and risk factors.
Industrial Property General Office-state organization for registration of deeds and properties, 2012. 74061(390040571)
Showing 24491 to 24500 of 25799 items