Search results

There are some studies performed that assess the influence of some factors leading to the effect of the heterogeneity of cement stone in concrete upon the mechanism of crack propagation, destruction and strength [1, 2, 3].
Some known methods of effecting hardening systems during their making and processing are possible to improve the structural characteristics and basic physical and mechanical properties [4].
Based on the mechanism of action on the destruction process, additives with similar properties are known as damping agents [6].
Otherwise, the introduction of low-strength low-modulus plastic stuff in energy extinguisher cores may negatively affect the basic physical and mechanical properties of concrete.
Dampers improve many technical properties of concrete, significantly reduce its shrinkage deformations.

Further details about mix design and mechanical properties of these concretes are presented in Miah et al. 2015 [9]. 24 hours after casting, all the concrete specimens (B40-II and B40-III) for uniaxial fire tests were tight wrapped by plastic film inside the laboratory up to the day of the test.
Part of the cracks which are not parallel to the heated surface should affect in a lesser extent the concrete spalling.
Limited biaxial loads apparently can affect in a non-negligible way the thermally induced microcracking, so reducing concrete permeabilty at high temperature.
Then, the applied load is a very important key factor that fire resistance design of concrete structures have to take into account when considering spalling.
“Critical Factors Governing the Fire Performance of High Strength Concrete Systems”, Fire Safety Journal 42, pp. 482-488

Set the element types, model sizes, material properties as the random input variables for finite element analysis.
Structural Reliability Analysis Extract the factors which affect the internal stresses and displacements out as random input variables in the central wing working process; the types of the variable distribution are determined depending on actual working conditions.
Condition factor Analysis of the Central Wing Establish the model [7, 8].
The aerodynamic loads, materials design sizes and other properties of the material are set to Gaussian distribution under simulated conditions. σs Table 1.
We can get the factors affected the maximum stress SMAX.

Metal-based biomaterial have reactivity, free electron, surface reactive, corrosion, and mechanical property change [2].
The combination of the high mechanical strength of metals with the osteoconductive properties of bioceramics as coatings on titanium implants is widely used in orthopedic surgery [8].
The implant materials, mechanical load, growth factors and hormone also affect the process of bone formation around an implant in implantation site [12].
Coating properties such as thickness, porosity, hydroxyapatite content, and crystallinity as well as implant roughness can influence the performance of a hydroxyapatite-coated implant [17].
Wagoner Johnson, The mechanical properties and osteoconductivity of hydroxyapatite bone scaffolds with multi-scale porosity, Biomaterials 28 (2007) 45-54.

At the same time, the shape factor of balconies affects their deformation and, thus their vulnerability.
Factors that increase the vulnerability of elements affected by water can be attributed to both the intrinsic characteristics of materials and their chemical composition [18].
Freezing undermines the building elements primarily by affecting the water and vapour present inside various materials [19].
The importance of considering materials’ properties, connections, and geometric characteristics of different components to reduce vulnerability was highlighted.
Siamardi: Evaluation of fracture energy and durability properties of pavement concrete incorporating blends of durable and non-durable limestone Aggregates: RSM modelling and optimization.

Aging behavior of Cu-Cr-Zr-Y alloy LIU Yong1,a, WANG Dejun2,b and TIAN Baohong1,c 1School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China 2College of Mechanical and Electric Engineering, Hebi Vocation and Technology College, Hebi 458030, China aliuyong@mail.haust.edu.cn, bwangdejun63@163.com, ctianbh@mail.haust.edu.cn Keywords: Cu-Cr-Zr-Y alloy, cold working, aging, high strength and high conductivity, mechanical properties.
Choosing the better comprehensive aging process (480 °C×2 hours) to do 1st drawing + aging + the 2nd drawing will finally produce different size wires (different deformations), that can be used for the mechanical properties testing.
(b) (a) Fig. 1 Conductivity (a) and microhardness (b) of the soluted alloy after aging at 480 °C under various cold working That major factor that impacts the electrical conductivity in the copper alloy is the electron scattering affect from the solution atom in the substratum.
This is in line with the good comprehensive properties of the alloy specially the high micro-harness with 60% deformation rate and aging at 480 °C for 2 hours.
Mechanical properties.

The density, mechanical properties and thermophysical properties of ZrB2 - based ceramic materials had been improved significantly [9-11].
Among them, ZrB2 ceramics with 20%SiC added had the best mechanical properties [2, 4, 7, 9].
However, to our best knowledge, previous researches mostly focused on the mechanical and thermal shock properties of composites [15, 20, 21].
[15] Yan, C., et al., Effect of PyC interphase thickness on mechanical and ablation properties of 3D C f /ZrC–SiC composite.
[22] Das, J., et al., Microstructure, mechanical properties and oxidation behavior of short carbon fiber reinforced ZrB2-20v/oSiC-2v/oB4C composite.

Although substituting natural aggregate with RPFA reduced the mechanical properties, it improved the mix flowability by up to 20% relative to the control mix.
Secondly, RPFA exhibits favorable properties that make it suitable for construction applications.
The decrease in unit weight observed with the addition of RPFA in various percentages can be attributed to several factors.
This decline in flexural strength can be attributed to multiple factors, including the formation of voids, the lower mechanical strength of plastic particles, and variances in particle shape and surface texture.
[6] Kamseu E, Cannio M, Obonyo EA, et al: Metakaolin-based inorganic polymer composite: Effects of fine aggregate composition and structure on porosity evolution, microstructure and mechanical properties.

Diamond sawing is a mechanical property of contact materials.
In this paper, the finite element method (FEM) and finite simulation software are used to discuss the various impact factors of laser, including material properties, energy, reflectivity, processing speed, spot size, environmental conditions, heat affected zone, etc., through the temperature during the cracking process.
First introduce the material properties and explain the operation mechanism of the wafer separation technology.
These misalignments lead to shortened carrier lifetimes affecting electrical leakage.
There is a need to assess important experimental factors that may affect the outcome and to identify appropriate orthogonal tables.

Effects of the concentration and preparing condition on the microstructure and mechanical properties of the coatings were studied by using SEM, XRD and nanoindentation technique.
The purpose of this article is to contrast CrNx coatings with different interlayer by means of microstructure and mechanical properties, such as micro-hardness and adhesion.
The causes may be there is not sharp Cr/CrNx alternant multilayer or the alternant structure can not be observed in our SEM measurement. 3.2 Mechanical properties The results of the nanohardness (H) and the elastic modulus (E) of the as-deposited CrNx coatings with different interlayer are shown in Fig.4.
A number of factors could account for the results, including residual stresses, texture and grain growth (size and density) [7], as presented in the XRD, SEM characteristics.
These critical scratch load values in this work are low as compared with the adhesion properties deposited by other PVD techniques, which can be attributed to the presence of a high stress at low temperature and the soft substrate.