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Online since: July 2014
Authors: D.K.S. Neshan, R. Ganesh, Chandrasekaran Kesavan, K. Rajendra Prasad
SiC reinforced aluminium based metal matrix composites are widely used in automobile, mining, mineral, aerospace, and other related applications due to their excellent combination of properties such as improved stiffness, reduced density, good corrosion resistance, improved high temperature properties, controlled thermal coefficient of expansion and enhanced electrical performance.
Discrepancies among the information reported so far on wear performance of composites may come from the large number of variables which can affect wear mechanism and wear rates.
The factorial portion of the CCD is the full factorial design with all combinations of the factors at two levels (low −1 and high +1) and composed of the eight star points and six central points which are the midpoints between the high and low levels.
The results of the multiple regression analysis and the significance of the factors are given in the Table 2 and 3.
The multiple regression equation generated using the full factorial table and the significance of the factors is given in the Table 5 and 6.
Discrepancies among the information reported so far on wear performance of composites may come from the large number of variables which can affect wear mechanism and wear rates.
The factorial portion of the CCD is the full factorial design with all combinations of the factors at two levels (low −1 and high +1) and composed of the eight star points and six central points which are the midpoints between the high and low levels.
The results of the multiple regression analysis and the significance of the factors are given in the Table 2 and 3.
The multiple regression equation generated using the full factorial table and the significance of the factors is given in the Table 5 and 6.
Online since: January 2013
Authors: Zhi Xue Wu, Shu Ai Tian
It is the discontinuous of geometry or mechanical properties of material that cause stress singularity for the joined junctions or wedges.
Yang and Munz [2] used the similar method analyzed stress intensity factors near the bi-material bonded edge under mechanical and thermal loading.
Munz and Yang [12] solved the stress intensity factors for the bi-material wedges by using finite element method.
Fig.2 Bi- and tri-material junction model Varying material constants As noted above, eigenvalue is affected by material constants too.
All these performances are consistent with mechanical behavior of materials.
Yang and Munz [2] used the similar method analyzed stress intensity factors near the bi-material bonded edge under mechanical and thermal loading.
Munz and Yang [12] solved the stress intensity factors for the bi-material wedges by using finite element method.
Fig.2 Bi- and tri-material junction model Varying material constants As noted above, eigenvalue is affected by material constants too.
All these performances are consistent with mechanical behavior of materials.
Online since: August 2025
Authors: Nia Sasria, Gusti Umindya Nur Tajalla, Ratna Eka Meliana Putri
In general, bioplastic degradation refers to internal and external factors.
Internal factors include chemical properties (polymer composition and chemical additives) and physical properties (molecular weight, hydrophilicity, morphology).
External factors depend on environmental factors, such as temperature, humidity, pH, etc [27].
Triawan, Mechanical and biodegradation properties of cornstarch-based bioplastic material, Mater.
Razman, Mechanical properties of oil palm fibre-reinforced polymer composites: a review, JMR&T. 17 (2022) 33-65
Internal factors include chemical properties (polymer composition and chemical additives) and physical properties (molecular weight, hydrophilicity, morphology).
External factors depend on environmental factors, such as temperature, humidity, pH, etc [27].
Triawan, Mechanical and biodegradation properties of cornstarch-based bioplastic material, Mater.
Razman, Mechanical properties of oil palm fibre-reinforced polymer composites: a review, JMR&T. 17 (2022) 33-65
Online since: January 2011
Authors: Miroslav Piska, Jan Dvořáček, Alexandra Sizová, Josef Sedlák, Aleš Polzer, Miloslav Forejt
Among the most important parameters of the coatings belong properties such as resistance to oxidation, thermal and abrasion, and good adhesion and tribological properties.
The hard coatings based on (Tix,Al1-x)N prevails with unique properties belong to the most used coatings today.
However, the main factor today which benefits to the life time of cutting tools is deposition of hard and wear resistant coatings.
Nevertheless, a lot of technological variables can affect the final performance such as preparation of the substrate, its chemical composition, grain size, phase distribution, thermal stability, hardness, toughness, etc.
Coating Grade, structure Composition Hardness HV 0.05 [MPa] Maximum working temperature [ºC] Coefficient of friction [-] TINALOX Nanocomposite supernitrid (Ti,Al)N 3500 1000 0.3 HYPERLOX Nanocomposite supernitrid (Ti0.4,Al0.6)N 3700 1100 0.3 Table 2 Nominal physical properties of the tested PVD coatings according to the CemeCon company.
The hard coatings based on (Tix,Al1-x)N prevails with unique properties belong to the most used coatings today.
However, the main factor today which benefits to the life time of cutting tools is deposition of hard and wear resistant coatings.
Nevertheless, a lot of technological variables can affect the final performance such as preparation of the substrate, its chemical composition, grain size, phase distribution, thermal stability, hardness, toughness, etc.
Coating Grade, structure Composition Hardness HV 0.05 [MPa] Maximum working temperature [ºC] Coefficient of friction [-] TINALOX Nanocomposite supernitrid (Ti,Al)N 3500 1000 0.3 HYPERLOX Nanocomposite supernitrid (Ti0.4,Al0.6)N 3700 1100 0.3 Table 2 Nominal physical properties of the tested PVD coatings according to the CemeCon company.
Online since: October 2016
Authors: Prihartini Widiyanti
(b) connection between column Ca(I) with column Ca (II) through a cluster of tetrahedral PO4 [5]
The physical, chemical, and biological properties of HA are similar to its bone.
Structure polimannuronat, poliguluronat, dan copolimer [6] Three main properties of alginate were soluble water which could increase solution viscosity, formed gel, and formed film and fiber.
Compressive Strength Test Result The mechanical properties of bone graft is one of the parameters in the bone graft to be considered for tissue engineering applications.
Bone graft must have good mechanical properties.
The addition of compaction force on each sample also affect the value of its compressive strength, where the greater value of compaction is done, the greater mechanical strength value of the composite material were produced.
Structure polimannuronat, poliguluronat, dan copolimer [6] Three main properties of alginate were soluble water which could increase solution viscosity, formed gel, and formed film and fiber.
Compressive Strength Test Result The mechanical properties of bone graft is one of the parameters in the bone graft to be considered for tissue engineering applications.
Bone graft must have good mechanical properties.
The addition of compaction force on each sample also affect the value of its compressive strength, where the greater value of compaction is done, the greater mechanical strength value of the composite material were produced.
Online since: July 2022
Authors: Roman Shevchenko, Valentyna Loboichenko, Nataliia Leonova, Mykhailo Divizinyuk
Introduction
The environment is constantly changing due to both natural and anthropogenic factors.
Whereas for emergencies of different levels and origins, the question of accurately determining the initial factors of their occurrence and development is quite difficult.
Today, it is one of the major challenges for humanity, causing significant casualties in different countries and affecting the modern world.
At the same time, chemicals contained in anthropogenic products, under the influence of various external factors, can migrate into the environment [34].
Khalid, Reuse of COVID-19 face mask for the amelioration of mechanical properties of fat clay: A novel solution to an emerging waste problem, Science of the Total Environment. 794 (2021) 148746
Whereas for emergencies of different levels and origins, the question of accurately determining the initial factors of their occurrence and development is quite difficult.
Today, it is one of the major challenges for humanity, causing significant casualties in different countries and affecting the modern world.
At the same time, chemicals contained in anthropogenic products, under the influence of various external factors, can migrate into the environment [34].
Khalid, Reuse of COVID-19 face mask for the amelioration of mechanical properties of fat clay: A novel solution to an emerging waste problem, Science of the Total Environment. 794 (2021) 148746
Online since: September 2005
Authors: S.A. Court, Pete S. Bate, M. Moore
Such biaxial
stretching limits are very sensitive to inhomogeneity with length scales greater than about half the
sheet thickness, and significant factors in that inhomogeneity are the materials grain size and the
spatial segregation of texture.
Differing orientations (and possibly sizes) of the constituent grains lead to a spatial variation of mechanical response.
Previous work on the aluminium alloy used here [9] indicated that the clustering of texture components affects the relationship between grain size and limit strain.
Results from MK models [9] show that the balanced biaxial limit strain increases indefinitely as the defect size- related here to grain size divided by thickness- is reduced, but the plane strain limit quickly saturates at a level determined by the gross material properties.
The geometry of the spatial distribution and better metrics of local mechanical response need to be included if that is to be achieved.
Differing orientations (and possibly sizes) of the constituent grains lead to a spatial variation of mechanical response.
Previous work on the aluminium alloy used here [9] indicated that the clustering of texture components affects the relationship between grain size and limit strain.
Results from MK models [9] show that the balanced biaxial limit strain increases indefinitely as the defect size- related here to grain size divided by thickness- is reduced, but the plane strain limit quickly saturates at a level determined by the gross material properties.
The geometry of the spatial distribution and better metrics of local mechanical response need to be included if that is to be achieved.
Online since: November 2013
Authors: Natinee Lopattananon, Jacques W.M. Noordermeer, Prachid Saramolee, Kannika Sahakaro, Wilma Dierkes
The higher epoxide groups content results in the better tensile properties but somewhat less than the compound with TESPT.
Epoxidized low molecular weight natural rubber (ELMWNR) has been used as a compatibilizer to enhance processing and mechanical properties of silica-filled NR [6], but the properties are still inferior compared to the TESPT/silica system.
As TESPT also plays a role as sulfur donor during mixing and vulcanization, and positively affects on the properties of silica/silane-filled NR [1], this present work investigates an influenece of extra sulfur added to the silica-filled NR compounds which are compatibilized with ELMWNRs.
The vulcanizates containing different content of LMWNR show almost no change in both properties, but the use of ELMWNRs increases the properties to the optimum values, indicating that epoxide groups of ELMWNRs can interact with the silanol groups of silica and improve silica dispersion.
The overall optimum properties are observed when 10 phr of ELMWNR-28 was used, but the properties are still lower when compared to the silica/TESPT compound.
Epoxidized low molecular weight natural rubber (ELMWNR) has been used as a compatibilizer to enhance processing and mechanical properties of silica-filled NR [6], but the properties are still inferior compared to the TESPT/silica system.
As TESPT also plays a role as sulfur donor during mixing and vulcanization, and positively affects on the properties of silica/silane-filled NR [1], this present work investigates an influenece of extra sulfur added to the silica-filled NR compounds which are compatibilized with ELMWNRs.
The vulcanizates containing different content of LMWNR show almost no change in both properties, but the use of ELMWNRs increases the properties to the optimum values, indicating that epoxide groups of ELMWNRs can interact with the silanol groups of silica and improve silica dispersion.
The overall optimum properties are observed when 10 phr of ELMWNR-28 was used, but the properties are still lower when compared to the silica/TESPT compound.
Online since: July 2012
Authors: Wei Jiang, Hua Han Liu
Moreover, mechanical properties, temperature effect, fatigue, etc, must be considered in the design stage.
Therefore, the can has to be selected as thin as possible within the limits of mechanical strength.
But by artificially increasing the mass scaling factor, the corresponding inertial forces will affect the mechanical response and provide unrealistic dynamic results.
To ensure that the inertial effects due to mass scaling do not significantly affect the simulation results, the kinetic energy of the can should be no greater than 10% of its internal energy during most time of the assembly process [7].
Finally, a mass scaling factor of 4 has been applied.
Therefore, the can has to be selected as thin as possible within the limits of mechanical strength.
But by artificially increasing the mass scaling factor, the corresponding inertial forces will affect the mechanical response and provide unrealistic dynamic results.
To ensure that the inertial effects due to mass scaling do not significantly affect the simulation results, the kinetic energy of the can should be no greater than 10% of its internal energy during most time of the assembly process [7].
Finally, a mass scaling factor of 4 has been applied.
Online since: January 2012
Authors: Xiao Ming Liang, Hong Yu Guo, Bing Cheng Liu
These parameters affect the output of the ring mold machine and energy consumption directly.
Fig.1 The model of ring die Fig.2 The model of ANSYS ring mold 1.2 Ring mold material properties In this paper, the materials used in the ring mold is 42CrMo[3].
Table 1-1 is the main parameters of the mechanical 42CrMo.
Through mechanical analysis, the maximum stress should also appear here, Numerical simulation and theoretical analysis are identical. 2) The stress distribution on the working surface in the ring mold is uneven.
Granulating machine capacity of the influence factors[J].
Fig.1 The model of ring die Fig.2 The model of ANSYS ring mold 1.2 Ring mold material properties In this paper, the materials used in the ring mold is 42CrMo[3].
Table 1-1 is the main parameters of the mechanical 42CrMo.
Through mechanical analysis, the maximum stress should also appear here, Numerical simulation and theoretical analysis are identical. 2) The stress distribution on the working surface in the ring mold is uneven.
Granulating machine capacity of the influence factors[J].