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Online since: July 2011
Authors: Rachid Ellaia, Mhamed Itmi, Norelislam Elhami
In fact, there are always differences between what can be calculated and what can be measured mainly due to the uncertainties in geometry, material properties, boundary conditions and loads.
These have a considerable impact on the behavior of mechanical systems.
In order to account for that, design based on purely determining analyses has been replaced by stochastic and reliability analyses which consider the uncertainties affecting the design parameters (Haldar and Mahadevan, 2000) [1].
In the last ten years there has been an increasing trend for analyzing structures using probabilistic information of loads, geometry, material properties, and boundary conditions.
They involve random properties in load and geometric properties in rectangular plates.
These have a considerable impact on the behavior of mechanical systems.
In order to account for that, design based on purely determining analyses has been replaced by stochastic and reliability analyses which consider the uncertainties affecting the design parameters (Haldar and Mahadevan, 2000) [1].
In the last ten years there has been an increasing trend for analyzing structures using probabilistic information of loads, geometry, material properties, and boundary conditions.
They involve random properties in load and geometric properties in rectangular plates.
Molecular Dynamics Simulation for Single Crystal Aluminum Nano-Indentation Effect by Indenter Radius
Online since: December 2007
Authors: Gui Wen Kang, Ying Xue Yao, L. Zhou, Y. Zhu
Mechanical property of material is studied using molecular
dynamic method from then on.
Material's elastic and plastic properties can be analyzed from the residual indentation depth in load-displacement curve.
This eliminates the affects mentioned above.
(2) From simulated results, it can be found that single crystal aluminum material under nano-scale has good plastic properties generally.
But, the elastic properties of single crystal aluminum can not be ignored.
Material's elastic and plastic properties can be analyzed from the residual indentation depth in load-displacement curve.
This eliminates the affects mentioned above.
(2) From simulated results, it can be found that single crystal aluminum material under nano-scale has good plastic properties generally.
But, the elastic properties of single crystal aluminum can not be ignored.
Online since: January 2015
Authors: Pavlo V. Kryvenko, Sergii Guzii, Hameedi Abdullah Jafar Al-Musaedi
The magnitude of electrode potential affects the concentration of gases (particularly oxygen), the state density oxides (thickness, solidity and chemical composition), etc.
For example, the presence of moisture is an important factor determining the speed of the corrosion process in a free access to oxygen, or the presence of corrosive ions.
The protective effect of barrier type coatings (paints, lining, rubberized, banding, mastic and liquid) is determined by the degree of their impermeability and depends on the diffusion and adhesion properties of the materials used, as well as the quality of the coating performance.
Physical and technological properties of geocement atmospheric resistant coatings.
Physical and mechanical properties of geocement-based atmospheric resistant coatings.
For example, the presence of moisture is an important factor determining the speed of the corrosion process in a free access to oxygen, or the presence of corrosive ions.
The protective effect of barrier type coatings (paints, lining, rubberized, banding, mastic and liquid) is determined by the degree of their impermeability and depends on the diffusion and adhesion properties of the materials used, as well as the quality of the coating performance.
Physical and technological properties of geocement atmospheric resistant coatings.
Physical and mechanical properties of geocement-based atmospheric resistant coatings.
Online since: February 2021
Authors: Theddeus Akano, Omotayo Abayomi Fakinlede, Ephraim Nwoye
Different methods have been employed to extract the relevant criteria defining the material properties.
The material properties of both the cyst and breast fibroglandular tissue are tabulated in Table 1.
Therefore, it is a notable fact that breast and cyst mechanical properties play a significant role in understanding the improvements involved with radiotherapy, tissue growth, and breast reconstruction surgery.
The proposed computational modelling takes into account the variation in the mechanical properties of the breast and cyst tissues, which are responsible for fibrocystic breast tissue deformability under the compressive effect.
Hose, “Factors influencing the accuracy of biomechanical breast models,” Med.
The material properties of both the cyst and breast fibroglandular tissue are tabulated in Table 1.
Therefore, it is a notable fact that breast and cyst mechanical properties play a significant role in understanding the improvements involved with radiotherapy, tissue growth, and breast reconstruction surgery.
The proposed computational modelling takes into account the variation in the mechanical properties of the breast and cyst tissues, which are responsible for fibrocystic breast tissue deformability under the compressive effect.
Hose, “Factors influencing the accuracy of biomechanical breast models,” Med.
Online since: January 2023
Authors: Le Phuong Quynh, Le Nhat Quang, Nguyen Kim Minh Tam, Long Quang Nguyen
Subsequently, zeolite filled with polymer is applied to increase mechanical strength and thermal stability [6].
The combination of film-forming zeolite with polymer will provide a material with great potential in anti-bacterial applications, exhibiting many properties instead of being used distinctively, and providing higher efficiency.
Zeolite and PVA did not affect much on the antibacterial rate with low percentages, about 14.7% and 12.3%, respectively.
The presence of zeolite has improved the mechanical property of the film in water environment.
[2] Ardean, C.; Davidescu, C.M.; Neme¸s, N.S.; Negrea, A.; Ciopec, M.; Duteanu, N.; Negrea, P.; Duda-Seiman, D.; Musta, V., Factors Influencing the Antibacterial Activity of Chitosan and Chitosan Modified by Functionalization, Int.
The combination of film-forming zeolite with polymer will provide a material with great potential in anti-bacterial applications, exhibiting many properties instead of being used distinctively, and providing higher efficiency.
Zeolite and PVA did not affect much on the antibacterial rate with low percentages, about 14.7% and 12.3%, respectively.
The presence of zeolite has improved the mechanical property of the film in water environment.
[2] Ardean, C.; Davidescu, C.M.; Neme¸s, N.S.; Negrea, A.; Ciopec, M.; Duteanu, N.; Negrea, P.; Duda-Seiman, D.; Musta, V., Factors Influencing the Antibacterial Activity of Chitosan and Chitosan Modified by Functionalization, Int.
Online since: August 2019
Authors: Evgeny Doronin, Boris Ivanov, Volodymyr Konoval, Alexey Vasilchenko
However limits of fire resistance and fire propagation on the structures without taking into account their mechanical damage are calculated.
With such a combined hazardous effect of explosion and fire (CHE EF), it should be expected that deformations of the supporting building structures during an explosion will affect their bearing capacity and, therefore, the fire resistance limit.
The stability of the rod (its bearing capacity) will depend on the parameters of the cross-section, the mechanical properties of the material and the eccentricity.
Then, according to [9], it is possible to find the stress reduction factors with an eccentric columnar deflection jВ.
Substituting these values into (1) and calculating the bearing capacity reduction factors γT, one can determine the critical temperatures for various values of eccentricities er by [10].
With such a combined hazardous effect of explosion and fire (CHE EF), it should be expected that deformations of the supporting building structures during an explosion will affect their bearing capacity and, therefore, the fire resistance limit.
The stability of the rod (its bearing capacity) will depend on the parameters of the cross-section, the mechanical properties of the material and the eccentricity.
Then, according to [9], it is possible to find the stress reduction factors with an eccentric columnar deflection jВ.
Substituting these values into (1) and calculating the bearing capacity reduction factors γT, one can determine the critical temperatures for various values of eccentricities er by [10].
Online since: January 2011
Authors: Ludger Lohaus, Hannes Weicken
Detail investigations of the fresh as well as hardened mortar properties were realized.
Detail investigations of the fresh as well as hardened mortar properties were realized.
Properties of hardened mortar In addition to the fresh mortar properties, the hardened mortar properties are also of great importance for guaranteeing proper protection against the effects of corrosion.
This is essential to determine whether the formation of the polymer film after storage under water or immediate dry storage affects the properties of the mortar.
Effects of polymer modification on the mechanical and fracture properties of high and ultra-high strength concrete.
Detail investigations of the fresh as well as hardened mortar properties were realized.
Properties of hardened mortar In addition to the fresh mortar properties, the hardened mortar properties are also of great importance for guaranteeing proper protection against the effects of corrosion.
This is essential to determine whether the formation of the polymer film after storage under water or immediate dry storage affects the properties of the mortar.
Effects of polymer modification on the mechanical and fracture properties of high and ultra-high strength concrete.
Online since: September 2015
Authors: Mohamed Ismail Harun, Lau Ee Von, Lee Jun Rong
The heat transfer properties of ionic wind are similar to moving air, generating high heat transfer coefficient and Nusselt number on source array surface due to recirculation eddies.
The ionic wind offers a favorable alternative to conventional air moving devices as it operates without any moving parts, which, thus, minimizes the effects of mechanical vibration, energy losses and associated noise.
Due to the distorted local boundary layer on the surface, the ionic wind flow is therefore not limited by the “no-slip” effect on surfaces which subsequently provides better heat transfer compared to mechanical fans [4].
In most modern electronics today, IC components are packaged in array arrangements which make convective heat transfer modeling complicated due to the disrupted core flow and the undetermined equivalent roughness factor across the individual components.
This phenomenon was suggested to be affected by the high crests and large grooves between the blocks on the array surface which generated circulating eddies and subsequently enhanced the heat transfer.
The ionic wind offers a favorable alternative to conventional air moving devices as it operates without any moving parts, which, thus, minimizes the effects of mechanical vibration, energy losses and associated noise.
Due to the distorted local boundary layer on the surface, the ionic wind flow is therefore not limited by the “no-slip” effect on surfaces which subsequently provides better heat transfer compared to mechanical fans [4].
In most modern electronics today, IC components are packaged in array arrangements which make convective heat transfer modeling complicated due to the disrupted core flow and the undetermined equivalent roughness factor across the individual components.
This phenomenon was suggested to be affected by the high crests and large grooves between the blocks on the array surface which generated circulating eddies and subsequently enhanced the heat transfer.
Online since: April 2024
Authors: Arif Mammadov, Aqil Babayev, Nizami Ismayilov, Muxtar Huseynov, Faiq Guliyev
To achieve high mechanical properties during heat treatment of pipes, effective and economical alloying of steel with vanadium has been proposed.
A high level of surface cleanliness and mechanical properties of finished pipe blanks is ensured by the consumption of at least 1.02 kg of aluminum per 1 ton of liquid metal mass.
The mechanical properties of the metal of pipe blanks comply with the requirements of the standard.
Study of the structural features and physical and mechanical properties of pipe steel of strength class p110//International Scientific Research Journal No. 12(78), part 1, December 2018, p. 123-132
Optimization of the structure and strength properties of special-purpose pipe steel // News of universities.
A high level of surface cleanliness and mechanical properties of finished pipe blanks is ensured by the consumption of at least 1.02 kg of aluminum per 1 ton of liquid metal mass.
The mechanical properties of the metal of pipe blanks comply with the requirements of the standard.
Study of the structural features and physical and mechanical properties of pipe steel of strength class p110//International Scientific Research Journal No. 12(78), part 1, December 2018, p. 123-132
Optimization of the structure and strength properties of special-purpose pipe steel // News of universities.
Online since: July 2005
Authors: Jean Michel Sprauel, H. Michaud, F. Galzy
Experimental Approach
Bending test:
For in service properties, the two critical weak points of the crankshaft are the crankpin fillets and
the lubrication holes.
These numerical calculations showed that the matter removal practically does not affect the circumferential stresses.
The second step of the analysis is the determination of the stabilised mechanical state resulting from the first cycles of fatigue.
For that purpose, the stress concentration factors were evaluated by finite element modelling.
This theory is based on the calculation of the stress intensity factor amplitude ∆K.
These numerical calculations showed that the matter removal practically does not affect the circumferential stresses.
The second step of the analysis is the determination of the stabilised mechanical state resulting from the first cycles of fatigue.
For that purpose, the stress concentration factors were evaluated by finite element modelling.
This theory is based on the calculation of the stress intensity factor amplitude ∆K.