Search:

  • Factors affecting the mechanical properties of

Search Options

Sort by:

Publication Type:

Open access:

Publication Date:

Periodicals:

Search results

Online since: April 2014
Authors: Stefan Teufelhart
Introduction In part design, production technology often is a limiting factor concerning the geometrical freedom [1], for example in case of geometrical accessibility in cutting processes or draft angles in casting.
The examinations are performed by Finite-Element-Analyses (FEA) in order to calculate the mechanical properties and the potential for lightweight design of the particular structures.
The material used in the simulation is aluminium 6061 without thermal treatment, which has the following mechanical properties: - Young’s modulus: 58.1 GPa - Limit of elasticity: 55 MPa - Tensile strength: 125 MPa - Density: 2.711 g/cm³ The strut diameter for all optimization approaches is kept constant at 2 mm, because only an adaption of the course of the lattice structure is considered in the investigation.
In total, it can be stated that inside the horizontal struts, a large part of the overall stress is affected by bending loads.
Table 1: Masses and characteristic values for the investigated specimen periodic structure flux of force adapted adapted with straight struts mass [g] 147.5 83.57 83.58 stiffness/mass [N/(mm*g)] 14.36 25.92 27.72 elasticity strength/mass [N/g] 2.757 2.646 6.183 Based on the presented examinations and results, it can be concluded that a flux of force adaption of lattice structures with straight struts is a very proper approach in order to reach good properties for lightweight design.
Online since: October 2012
Authors: Magnus Wessen, Mattias Östklint
From a production point of view it is also very important that the time needed for slurry production is as short as possible, or more specifically short enough not to negatively affect the overall production cycle time.
In a study of the tensile properties for Mg-Al alloys containing up to 15% Al, it was shown that an alloy with 12% Al reached a maximum elongation at fracture in the range of 1.5-2.5% depending on microstructure coarseness[8].
Consequently, there is some other factor causing these significant differences, which is still to be understood.
It is interesting to see how the difference between the calculated liquidus temperature and slurry temperature is affected by the Al-content; see Fig. 6.
Effect of microstructure on mechanical properties of as-cast Mg-Al alloys.
Online since: January 2022
Authors: Hovsep Hoveyan, Marya Badalyan, Amalya Karapetyan
In the process of hardening of the clinker-free binder, the phase-mineralogical composition of the formed new formations differs from the new formations that are synthesized during hardening of traditional Portland cement, which explains the difference in their properties.
The expediency of using concretes based on a clinker-free binder is explained by a number of factors: the energy intensity per unit of production is reduced 3...4 times, the durability of items is drastically increased due to the reduction in the phase composition of easily corrosive high-basic hydrosilicates, which gives the product high durability, resistance in aggressive environments and other additional operational characteristics[1].
One of the most important distinctive conditions is the activation of the initial substances (components), which affect the duration of mineral formation without changing its nature.
Along with the mechanical forces of adhesion during the hardening process, there is also an intense interaction between the active aluminosilicate component and the monomineral binder.
Online since: March 2008
Authors: Abdul Majeed Azad, Sathees Kesavan, Sirhan Al-Batty
Recent research has shown that many of the nano materials' properties depend on particle size in the nanoscale regime [17].
Moreover, the structure of nanomaterials also results in novel and significant changes in physical and chemical properties; for example, coercive force in magnetic materials can be changed, surface reactivity and catalytic capability can be amplified, and mechanical strengths can be increased by a factor of five or more [18-23].
Also, their huge specific surface area allows nanoparticles to be considered as surface-produced on the macroscale, thus affecting their bulk properties.
For certain spherical nanoparticles in the range of 3 nm, about 50% of the atoms or ions are on the surface, allowing both the possibility of manipulating of bulk properties by surface effects and near-stoichiometric chemical reactions [17].
Magnetite, changes its magnetic property when its size is reduced to below 15 nm, its magnetic properties become more pronounced, and it becomes superparamagnetic.
Online since: April 2005
Authors: Sergiy V. Divinski, Igor S. Golovin, Tatiana S. Pavlova, S.B. Golovina
For more details on the structure and mechanical properties of these alloys see [9].
Two different mechanical spectroscopy techniques were used: 1) Two vibrating-reed apparatus with free decay method for damping measurement (IMNF Technical University of Braunschweig) in a vacuum of about 10 -3 Pa were used to measure IF of bar shaped specimens (30×2×0.4 mm 3 ).
A mechanical loss peak in case of a relaxation effect with a single relaxation time is well-known to be described by a Debye equation [11].
The accuracy of these values is affected by ordering.
Material Dv (m 2 /s) Fe-26Al 1.59×10-15 Fe-26Al-2.0Ti 5.79×10-16 Fe-26Al-0.3Nb 6.28×10-16 Addition of Ti and especially Nb to the Fe-26Al alloy slows down the Fe bulk diffusivity by a factor of two to three at T = 1055 K.
Online since: February 2014
Authors: Paolo Mercorelli
The outcomes are so general that it is possible to speak of structural properties in robotic manipulation.
Here it is proven that the non-interaction of"rigid--body'' object motions and reachable "internal'' forces are structural properties of general manipulation systems.
The following grasp properties have a relevant influence on the dynamic behaviour of the manipulation system, cf. [12, 11].
These properties are based on the existence of the null spaces of the Jacobian and grasp matrices J and G and of their transpose matrices.
On some geometric control properties of active suspension systems.
Online since: February 2022
Authors: Viktor M. Timokhin
Electrical insulation is a main factor determining the reliability and service life of high-voltage parts of electrical machines.
However, this formula cannot take into account all the factors that affect the electrical insulation, and is very approximate.
Mica is non-flammable, has good dielectric properties and very high dielectric strength up to 6.108 V/m.
Electrical insulation properties are due to magnesium hydrosilicate, muscovite or phlogopite.
Rotter Mica products, properties, developments, and applications.
Online since: September 2012
Authors: Yan Ching Jean, Hong Min Chen, J. David van Horn
Thus, PAS can measure the physical and chemical properties for positrons and Ps after being stopped in and in certain locations of the sample.
The binding properties of hollow silica shell materials with uptake and release of Cu2+ and Co2+ were assessed to predict conditions for optimum performance [34].
In other studies, two kinds of human tumor necrosis factors were compared by PAS to correlate to their relative cytotoxicity [96].
The chemical components and physical structure may be different from one sample to another and may be due to the original skin location, patient age, fat percentage, or other factors.
Jean, Correlations between gas permeation and free-volume hole properties of medical plastics.
Online since: August 2008
Authors: Manfred Reiche
This is important because the surface cleanliness has a direct effect on both the structural and electrical properties of the bonding interface as well as on the resulting electrical properties of the bonded material.
The mechanical properties of bonded wafer pairs (stress) and the electrical properties depend on the applied oxide layer.
Variations of the tilt and twist angles are the most important factors effecting the morphology and structure of the resulting dislocation network.
The investigations proved that such interactions induce dramatic changes of the dislocation properties.
Recently, however, the luminescence properties of dislocation networks were studied in detail.
Online since: August 2011
Authors: Rui Li, Yu Jun Liu, Ji Wang, Yan Jun Li, Yan Ping Deng
Once the weight exceeds the allowable value, some outfitting may not be assembled and it will affect the manufacturing process and security directly.
Many factors should be considered to allocate tolerances to the framing and outfitting items.
INSTRUMENTATION IN2 INSTRUMENT EQUIPMENT IN3 IN-LINE INSTRUMENTATION IN4 FILED INSTRUMENTS IN5 INSTRUMENT CABLES IN6 INSTRUMENT BULKS LC Loss Control LC0 LOSS CONTROL - DRILLING LC1 MISC.LOSS CONTROL LC2 SAFETY EQUIPMENT LC3 FIRE PROTECTION SYSTEM LC4 LOSS CONTROL BULKS MC Mechanical MC0 DRILLING EQUIPMENT MC1 MISC.MECHANICAL MC2 PROCESS PUMPS MC3 PROCESS - COMPRESSORS MC4 PROCESS- VESSELS MC5 PROCESS EXCHANGES MC6 PROCESS MISC.EQUIPMENT MC7 POWER GENERATION EQUIP MC8 MECHANICAL HANDLING MC9 SPARE MC10 MACHINERY EXHAUSTS MC11 UTILITIES - MISC.EQUIPMENT MC12 UTILITY - PUMPS MC13 UTILITY - COMPRESSORS MC14 UTILITY - VESSELS MC15 UTILITY - EXCHANGERS MC16 UTILITY - EQUIP PACKAGES ME Materials ME0 DRILLING ME1 MISC.MATERIALS ME2 PAINT ME3 ANODES PI Pipelines and Risers PI0 PIPING - DRILLING PI1 MISC.PROCESS GAS PIPING PI2 PROC GAS - 1.5" & BELOW PI3 PROC GAS - 2" - 3" PI4 PROC GAS - 4" - 6" PI5 PROC GAS - 8" & ABOVE PI6 MISC.PROC LIQUIDS PIPING PI7 PROC LQDS - 1.5" & B PI8 PROC LQDS - 2" -
TELECOMMUNICATION TE2 TELECOMMUNICATION BULKS WE Weight Engineering WE0 MISC CONST.N & OPER WE1 OERATORS ALLOWANCE WE2 TEMPORARY EQUIPMENT WE3 DRILLING Futhermore, some function parameters are required for the management, such as: (1) Weight condition Weight condition is an importmant property of item.
Showing 24901 to 24910 of 25799 items