Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: March 2011
Authors: Paolo Scardi, Cristy Leonor Azanza Ricardo, Matteo Ortolani, Andrea Lausi
Texture, either crystallographic or morphological, strongly influences the final mechanical properties and thus needs to be taken carefully into account when performing a stress analysis, according to an appropriate grain-interaction model [4-8].
Where such a model fails to describe the material behaviour (because of too restrictive hypotheses), mechanical properties can be measured by means of in-situ XRD during mechanical testing [9-11].
A very important feature, that is only available at SR facilities, is the possibility of tuning the X-ray energy: ideally, high energy means deep penetration, useful for measuring bulk properties; whereas low energy means shallow penetration, and allows measuring surface properties.
The technique consists of repeating an X-ray stress measurement at different applied loads: X-ray elastic constants, in terms of stress factors Fij [2], are extrapolated for every reflection and sample tilt as the slope of the strain versus applied load plot.
Electrodeposited Nickel, extrapolating stress factors: (200) reflection, ψ=0°, φ=0° (beam energy 15 keV).
Online since: July 2013
Authors: Alessandro de Stefano, Rosario Ceravolo, Antonino Quattrone, L. Zanotti Fragonara, E. Matta
Both static and dynamic tests were carried out at the aim of evaluating the residual load-bearing capacity and investigating the effects of deterioration on their dynamic properties.
Several factors, as aggressive environmental conditions, corrosion and cracking propagation due to cyclic loads, may bring to a substantial reduction of the safety margins.
Indeed, the edge beams usually undergo higher stress levels and are more exposed to deterioration factors, as weather, chemical attacks of chlorides contained in de-icing salts and pollutants emitted by vehicle traffic.
Each deck of the viaduct was built by five beams having the geometrical and mechanical characteristics nominally equal.
Both the scaling factors have been estimated through a FE model, assuming the mean values of the material properties and the geometrical dimensions reported in the original design documents.
Online since: March 2025
Authors: Abel Olajide Olorunnisola, Daniel Gbenga Adekanmi, Ayodunmomi Esther Olowofoyeku, Ademola Kabiru Aremu, Ayobamiji Emmanuel Olowofoyeku, Ezekeil Oluwatobi Faluyi
Excess UV exposure damages plant DNA, negatively affecting growth [3, 28-31].
This causes a loss of mechanical properties, reduced functionality, and reduced lifespan.
Aggregation also creates weak points in the composite thereby weakening the mechanical, thermal, and electrical properties of the product.
Albdiry, Effect of melt blending processing on mechanical properties of polymer nanocomposites: a review, Polym.
Andronic, Synergic Effect of TiO2 Filler on the Mechanical Properties of Polymer Nanocomposites, Polymers (Basel) 13 (2021) 1-24
Online since: January 2010
Authors: Dun Wen Zuo, Wen Zhuang Lu, M. Wang, Feng Xu, X.J. Wu
Chemical vapor deposited (CVD) diamond film has a series of outstanding properties.
Introduction The outstanding properties of Chemical vapor deposited (CVD) diamond film, extreme hardness, low friction coefficient, excellent wear resistance and high thermal conductivity address CVD diamond film as the ideal cutting and drilling tools [1-3].
Before the temperature field analysis, follows are some assumptions made to simplify the calculation: The physical properties of CVD diamond film (such as thermal conductivity, heat capacity and density) are isotropic and symmetrical.
With the above-mentioned assumptions and the mathematical model for heat transfer and mechanical properties mentioned in Refs [10], a thermal analysis is performed to calculate the temperature distribution in the workpiece by using ANSYS.
Optimal scanning speed and laser power The power of the laser and the scanning speed are two key factors in the machining process of CVD diamond film.
Online since: October 2017
Authors: Tomáš Jarolím, Jaroslav Válek, Lucia Osuská, Martin Labaj
Their influence on the structure of cement stone differ in each case, but in general can be divided into a physical influence – mikrofiller filling the fine pores and enhancing mechanical properties and impermeability of cement stone, and a chemical influence – the reaction with the components of cement clinker, leading to the formation of additional structures, which in turn positively affect the mechanical and durability properties of the composite.
Nanoparticles offer significantly improved properties (especially reactivity) than their micro-counterparts and moreover, due to quantum effects, they may offer entirely new properties.
The product of this reaction is C-S-H gel, which fills cement stone pores and enhances its hardened state mechanical properties [4].
Both mentioned nanoparticle doses have advanced to the next stage, in which their effects on physical and mechanical properties of cement mortars, particularly tensile and compressive strength, were verified.
This phenomenon is observed by many authors and refers to a specific behavior of nanoparticles that affect the initial properties, but interfere less in the longer-term ones.
Online since: October 2025
Authors: Nia Sasria, Oktaviani Tang, Hizkia Alpha Dewanto
The biodegradation process of bioplastics is influenced by several factors such as pH, water content, temperature, nutrient availability, and temperature.
To improve the physical properties of this bioplastic, glycerol is added as a plasticizer and chitosan as a reinforcement [5].
The addition is done so that the plastic film has mechanical and physical properties that can be improved and so that it can be protected from microorganisms that can damage the plastic film.
The tensile value for moderate properties (Bioplastic Standard) is 1-10 Mpa.
In making this plastic sample, optical microscope testing was carried out to see the surface physical properties of a bioplastic sample and tensile testing to determine the mechanical properties of a bioplastic sample.
Online since: December 2025
Authors: Artem Ruban, Viktoriya Pasternak, Vasyl Popovych, Mykyta Khramov
Their study allows us to better understand the patterns of behavior of such systems, optimize the processes associated with their use, and create new materials with unique properties [3].
It is worth noting that multicomponent systems consist of particles that can have different shapes, sizes and physical properties.
It should be noted that such models allow for the statistical properties of the system to be taken into account without the need for detailed modeling of each particle.
It is also important that particles of different shapes can form hybrid structures, affecting the macroscopic properties of the system).
The simulation allowed us to obtain important indicators of particle self-organization, their interaction and diffusion properties depending on their geometry.
Online since: October 2012
Authors: E. Haruman, Mohd Shahar Sulaiman, K.A. Sunhaji, T. Ghalib, Yupiter H.P. Manurung, M.A.R. Ridzwan, Mohd Redza Ridhwan, N.L. Robert, M.H. Hazwan
Introduction Weld induced distortion is one of familiar problems that frequently occurs in consequence of welding process which can adversely affect the dimensional accuracy and repair cost.
The mechanical and thermal properties are tabulated in Table 2.
Table 2: Physical properties of S355J2G3.
Elements [%] S355J2G3 C 0.180 Mn 1.600 Si 0.550 S 0.035 P 0.035 Properties Values Young’s modulus [GPa] 210 (at 20oC) Minimum yield strength [MPa] 355 Poisson’s ratio, ν 0.33 Solidus temperature, TS [oC] 1404 Liquidus temperature, TL [oC] 1505 A fast prediction of distortion can be computed by using local/global approach.
Result and Discussion Fig. 5 presents the predicted result of angular distortion in butt joint using Pam-Assembly without and with 10x magnification factors.
Online since: October 2011
Authors: Ching Been Yang, Chyn Shu Deng, Hsiu Lu Chiang
First, use Taguchi orthogonal array experimental factors with orthogonal properties for ultrasonic-assisted turning of the L9 orthogonal array, and apply the orthogonal array experimental data as initial ANN training examples.
Control factor level ofTaguchi method.Table 1 shows the four control factors and three levels.
Among the factors affecting surface roughness quality, rotational speed was the most significant, followed by feed rate.
Among the factors affecting surface roughness quality, rotational speed was the most significant.
Among the factors affecting surface roughness, rotational speed was most significant, followed by turning feed rate.
Online since: May 2006
Authors: J.H. Yoon, Jae Ho Jeong, Shin Yoon Kim, Suk Young Kim, Chang Kuk You, Eui Kyun Park, J.T. Kim, Hong In Shin
Recent studies have focused on developing a suitable scaffold for optimizing bone regeneration that have the similar physical properties of bone.
The degree of porosity, however, is closely related with mechanical stability.
The gradual replacement of scaffold by new bone at an appropriate rate should be achieved without disturbing the regenerating environmental factors.
There is a close relation among the degree of porosity, rate of biodegradation and mechanical stability.
In our trials to improve biodegradability, the the incorporation of Na2O without affecting other physical characteristics such as compressive strength was not successful.
Showing 12841 to 12850 of 26166 items