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Online since: February 2018
Authors: Sergiy V. Divinski, Alexander V. Pokoev, Regina Post, Julia V. Osinskaya, Gerhard Wilde
Introduction
The effect of magnetic field on thermodynamic and kinetic properties and microstructure evolution in ferromagnetic materials is known for a long time, see e.g. [1-4].
Moreover, texture and microstructure evolution in cold-rolled Al or Zr were found to be affected by a magnetic field, too [7, 8].
The sample surface was prepared by mechanical polishing using a Tegramin polishing machine and applying 0.5 µm diamond paste in the final step.
Aging at all investigated temperatures enhances the microhardness of the alloy by a factor of two to three with respect to the values after water-quenching.
Furthermore, it was found that the dislocation motion can be easily activated under uniform magnetic field in the absence of any detectable external mechanical action [17, 18].
Moreover, texture and microstructure evolution in cold-rolled Al or Zr were found to be affected by a magnetic field, too [7, 8].
The sample surface was prepared by mechanical polishing using a Tegramin polishing machine and applying 0.5 µm diamond paste in the final step.
Aging at all investigated temperatures enhances the microhardness of the alloy by a factor of two to three with respect to the values after water-quenching.
Furthermore, it was found that the dislocation motion can be easily activated under uniform magnetic field in the absence of any detectable external mechanical action [17, 18].
Online since: December 2016
Authors: Robert Macků, Lubomir Skvarenina
These defects have their origin mainly in the technological process of
a production but they can be caused by an accidental mechanical stress during a normal operation,
too.
Experimental Samples properties.
The front Ag fingers are prepared by a roll-to-roll screen printing [3].The c-Si samples are segmented by a mechanical breaking into the fragments.
The important factor having an impact on the best edge quality is grinding and polishing of the edges at an angle of ∼ 45° inside the water bath and under a constant pressure.
The lower limit of this range is affected by an option of the analyser alone and the upper limit is affected by a frequency response of the amplifier, but it does not constitute a restriction for our experiments.
Experimental Samples properties.
The front Ag fingers are prepared by a roll-to-roll screen printing [3].The c-Si samples are segmented by a mechanical breaking into the fragments.
The important factor having an impact on the best edge quality is grinding and polishing of the edges at an angle of ∼ 45° inside the water bath and under a constant pressure.
The lower limit of this range is affected by an option of the analyser alone and the upper limit is affected by a frequency response of the amplifier, but it does not constitute a restriction for our experiments.
Online since: September 2013
Authors: Ji Ke Tan, Hui Yang, Jin Yu Pan
Sun Jianyun[2] analyzed the dynamic response and mechanical properties of SRC columns under explosive shock loads by LS–DYNA and established a simplified model of the equivalent single degree of freedom for SRC columns.
Researching the dynamic response of the structure under blast loading, we can analyze the damage morphology and related factors, which have important reference value of the antiknock performance study of structures.
To reduce the amount of calculation but does not affect the outcome correctness.
Because concrete is the material of poor tensile properties and prone to brittle failure.
Conclusions Analysis dynamic response of column under blast loading is important that we can know its failure pattern and related factors which have important reference value to its antiknock performance.
Researching the dynamic response of the structure under blast loading, we can analyze the damage morphology and related factors, which have important reference value of the antiknock performance study of structures.
To reduce the amount of calculation but does not affect the outcome correctness.
Because concrete is the material of poor tensile properties and prone to brittle failure.
Conclusions Analysis dynamic response of column under blast loading is important that we can know its failure pattern and related factors which have important reference value to its antiknock performance.
Online since: September 2016
Authors: Maria A. Vasilyeva
Interactions between the matrix and the filler particles may be of varying strength, and it has an effect on the rheological and mechanical properties of the composite [1].
The combination of the magnetic properties of the filler and the elastic properties of the polymer matrix in magneto-elastics gives rise to a number of unique properties.
Since the magneto-elastics are composite materials, their mechanical behavior defined by a combination of elastic properties of the polymer matrix and the properties of the magnetic particles distributed within the matrix [3].
The research results ability of the polymer to maintain strength and plastic properties after swelling in aggressive liquids in a relaxed state to change one or more physical and mechanical properties are displayed in Fig. 1.
[11] Huang Yanmin, Liu Lan, Chen Juanjuan, Mechanical and thermal properties of FPM/PHACM/ACM blends, Journal of elastomers and plastics. 44 (2012) 533-548
The combination of the magnetic properties of the filler and the elastic properties of the polymer matrix in magneto-elastics gives rise to a number of unique properties.
Since the magneto-elastics are composite materials, their mechanical behavior defined by a combination of elastic properties of the polymer matrix and the properties of the magnetic particles distributed within the matrix [3].
The research results ability of the polymer to maintain strength and plastic properties after swelling in aggressive liquids in a relaxed state to change one or more physical and mechanical properties are displayed in Fig. 1.
[11] Huang Yanmin, Liu Lan, Chen Juanjuan, Mechanical and thermal properties of FPM/PHACM/ACM blends, Journal of elastomers and plastics. 44 (2012) 533-548
Online since: March 2021
Authors: M.A. Mohd Fauzi, N.H. Hamid, M.M.H. Shamsudin
The fresh physical properties of recycled PET fiber reinforced concrete is slump test while the hardened mechanical properties are compressive strength and flexural strength.
Therefore, the interlocking of fibers that resists the flow of fresh concrete is affecting the workability of concrete.
Table 3 shows the summary of all results of mechanical properties obtained throughout this study.
Faisal, The Mechanical Properties of PET Fiber Reinforced Concrete from Recycled Bottle Wastes, Adv.
Montedo, Mechanical Properties of Recycled PET Fibre in Concrete, Mater.
Therefore, the interlocking of fibers that resists the flow of fresh concrete is affecting the workability of concrete.
Table 3 shows the summary of all results of mechanical properties obtained throughout this study.
Faisal, The Mechanical Properties of PET Fiber Reinforced Concrete from Recycled Bottle Wastes, Adv.
Montedo, Mechanical Properties of Recycled PET Fibre in Concrete, Mater.
Online since: May 2011
Authors: Hui Mao, Yan Wang, Cheng Hua Li
Based on the experiments of four connections with widened beam flange section which included two arc widened beam flange connections and two welded side-plate connections specimens and one ordinary connection under cyclic loading, 3-D nonlinear finite element models were created by using ANSYS software to analyze the mechanical properties of these two types of widened beam flange connections, such as skeleton curve, ultimate load, ductility and failure mode etc.
Taking correspondent dot of 0.85Pu in the descending phase of skeleton curve as ultimate point, ultimate load and ductility factor μ of all specimens are derived from the skeleton curve and are listed in table 2.
Table2 Comparison of calculating value and test value of bearing capacity and ductility specimen Ultimate load Pu(kN) Ductility factor μ Calculating value Test value Error (%) Calculating value Test value Error (%) WF-1 WF-2 SP-1 SP-2 NBF 135.72 130.34 139.48 133.17 118.00 141.85 138.65 157.95 153.73 149.75 4.5 6.4 13.2 15.4 26.3 4.04 4.18 3.68 3.89 2.9 4.13 4.17 3.75 4.00 2.27 2.2 0.2 1.9 2.8 21.7 From the table 2, we can see that except for the NBF specimen, the others have small error between finite element calculating value and test value.
At the same time, the part lies in the weld heat-affecting zone, so the descending of the material behavior will lead to brittle crack at this location, the failure pattern of the welded side-plate connection changes from local buckling of beam flange and web to brittle fracture at the end of the widened beam flange.
Taking correspondent dot of 0.85Pu in the descending phase of skeleton curve as ultimate point, ultimate load and ductility factor μ of all specimens are derived from the skeleton curve and are listed in table 2.
Table2 Comparison of calculating value and test value of bearing capacity and ductility specimen Ultimate load Pu(kN) Ductility factor μ Calculating value Test value Error (%) Calculating value Test value Error (%) WF-1 WF-2 SP-1 SP-2 NBF 135.72 130.34 139.48 133.17 118.00 141.85 138.65 157.95 153.73 149.75 4.5 6.4 13.2 15.4 26.3 4.04 4.18 3.68 3.89 2.9 4.13 4.17 3.75 4.00 2.27 2.2 0.2 1.9 2.8 21.7 From the table 2, we can see that except for the NBF specimen, the others have small error between finite element calculating value and test value.
At the same time, the part lies in the weld heat-affecting zone, so the descending of the material behavior will lead to brittle crack at this location, the failure pattern of the welded side-plate connection changes from local buckling of beam flange and web to brittle fracture at the end of the widened beam flange.
Online since: August 2022
Authors: Younès Menail, Latifa Alimi, Sofiane Boudiaf, Noureddine Metrane
Hooper, Risk factors for periprosthetic femoral fractures around total hip arthroplasty: a systematic review and meta-analysis, ANZ J Surg 90 (4) 4 41–4 47 (2020)
Trujillo, Seawater ageing effect on the mechanical properties of composites with different fiber and matrix types, Journal of Composite Materials, 1–13 journals.sagepub.com/home/jcm, 2018 DOI:10.1177/0021998318811514 [24] E.
Drzal, Fiber-matrix adhesion and its effect on composite mechanical properties: II.
Holl, Effects of moisture and thermal cycling on in-plane shear properties of graphite fibre-reinforced cyanate ester resin composites, Compos.
Buchmeiser Carbon Fibers: Precursors, Manufacturing, and Properties Macromol, Mater.
Trujillo, Seawater ageing effect on the mechanical properties of composites with different fiber and matrix types, Journal of Composite Materials, 1–13 journals.sagepub.com/home/jcm, 2018 DOI:10.1177/0021998318811514 [24] E.
Drzal, Fiber-matrix adhesion and its effect on composite mechanical properties: II.
Holl, Effects of moisture and thermal cycling on in-plane shear properties of graphite fibre-reinforced cyanate ester resin composites, Compos.
Buchmeiser Carbon Fibers: Precursors, Manufacturing, and Properties Macromol, Mater.
Online since: November 2012
Authors: Ying Ping Qian, Yong Wang, Ju Hua Huang, Xi Zhi Zhou
So cooling stage is the most important phase because it significantly affects the productivity and the quality of molded parts.
By combining Eq.2 to Eq.4, we can get a simplified equation: (5) Besides the the thermal properties and predefined Tm, Td, Tco, we can see from the Eq.5 that cooling time tc is mainly influenced by pitch a, depth b and diameter d.
So a Box-Behnken experiment design with 15 trials for three factors and three levels was chosen.
The ranges of the three factors can be defined based on previous experience and engineering analysis.
The three levels of the factors are listed in Table 1. “1”, ‘‘0’’ and ‘‘+1’’ represent the low, middle and high levels of the factors, respectively.
By combining Eq.2 to Eq.4, we can get a simplified equation: (5) Besides the the thermal properties and predefined Tm, Td, Tco, we can see from the Eq.5 that cooling time tc is mainly influenced by pitch a, depth b and diameter d.
So a Box-Behnken experiment design with 15 trials for three factors and three levels was chosen.
The ranges of the three factors can be defined based on previous experience and engineering analysis.
The three levels of the factors are listed in Table 1. “1”, ‘‘0’’ and ‘‘+1’’ represent the low, middle and high levels of the factors, respectively.
Online since: November 2011
Authors: Mahmoud M. Tash, Saleh Alkahtani, F.H Samuel
A thorough understanding of all of the metallurgical factors affecting their machinability will help one to select the metallurgical adjustments that are required to achieve the optimum machining combinations critical to maximum productivity at high speed machining.
Copper and magnesium strengthen the alloy matrix and improve the mechanical properties and alloy machinability.
The most important factors that determine the condition of the work material that can influence the outcome of the machinability are:[10] · Alloy chemistry, additions, · Morphology, size and volume fraction of the constituent phases, · Microstructure (grain refining and modification), · Porosity, · Heat treatment temper, and · Physical and mechanical properties.
Heat treatment is one of the most important controlling factors used to enhance the mechanical properties and machinability of cast Al-Si alloys, through optimizing both solution and aging heat treatment given to those types of alloys.
Jorstad, “Influence of Aluminum Casting Alloy Metallurgical Factors on Machinability”, Society of Automotive Engineers, 400 Commonwealth Dr., Warrendale, PA, 1980 (Report, 15 pages)
Copper and magnesium strengthen the alloy matrix and improve the mechanical properties and alloy machinability.
The most important factors that determine the condition of the work material that can influence the outcome of the machinability are:[10] · Alloy chemistry, additions, · Morphology, size and volume fraction of the constituent phases, · Microstructure (grain refining and modification), · Porosity, · Heat treatment temper, and · Physical and mechanical properties.
Heat treatment is one of the most important controlling factors used to enhance the mechanical properties and machinability of cast Al-Si alloys, through optimizing both solution and aging heat treatment given to those types of alloys.
Jorstad, “Influence of Aluminum Casting Alloy Metallurgical Factors on Machinability”, Society of Automotive Engineers, 400 Commonwealth Dr., Warrendale, PA, 1980 (Report, 15 pages)
Online since: June 2025
Authors: Ou Yang Kun, Guan Yu Wang, Ying Qiao Liu, Xue Can Li, Yun Bo Yan
Adding different metal elements to aluminum causes it to change its mechanical properties.
Mechanical properties [19].
Comparisons of mechanical properties between Ti72 and Ti alloys manufactured through additive manufactured: (a) Density; (b) Tensile properties; (c) Specific strength [21].
Researchers are investigating how carbon fiber reinforcement affects the specific strength and mechanical properties of coal and petroleum-based carbon foams.
This approach enabler the use of ceramics with cheaper internal electrodes and without affecting the piezoelectric characteristics.
Mechanical properties [19].
Comparisons of mechanical properties between Ti72 and Ti alloys manufactured through additive manufactured: (a) Density; (b) Tensile properties; (c) Specific strength [21].
Researchers are investigating how carbon fiber reinforcement affects the specific strength and mechanical properties of coal and petroleum-based carbon foams.
This approach enabler the use of ceramics with cheaper internal electrodes and without affecting the piezoelectric characteristics.