Search results

Introduction Physical mechanical and thermal stability of a material is the primary factor responsible for quality of polymer vehicle components.
In order to evaluate the influence of the cross-linking degree (synthesis reaction) on the properties of a material, it has been investigated how heat treatment of a vehicle component part made of rigid PUF affects thermal physical and mechanical characteristics of the material.
Bazhenov, Mechanical properties and processing of composite materials, Dolgoprudny, Intellekt Publ., 2014
Shafigullina, Investigation of physical-mechanical and performance properties of glass fiber reinforced polyurethane materials used in the machine building industry, Proc.
Shafigullina, Analysis of physical and mechanical properties of polyurethane facade thermal panels used in civil construction.

Introduction The non-destructive testing has been revealed to be an important tool for obtaining information about concrete properties of a structural element.
In the same way, the evolution and uniformity of certain fundamental properties of the material, such as strength and elasticity modulus, can be inspected in the structural element during construction or throughout a study period.
The first includes tests that estimate the strength and the elastic properties of the material.
It was fixed a 0.5 water-cement factor and a weight ratio of one cement to one fine aggregate to two coarse aggregate.
Properties of concrete.

The investigations have resulted in recognition that with control of some parameters, result in certain morphologies of ferrite, the mechanical properties of steel with these ferrite structures are improved.
The austenite to ferrite transformation and growth of different ferrite morphologies are important because by controlling growth of different ferrite morphologies, the mechanical properties of steel are improved [1,2].
Observation of the mechanical properties of materials with different ferrite microstructure has shown that Widmanstatten ferrite, upper bainite or grain boundary ferrite are detrimental to toughness, whereas intragranular ferrite improves it.
It is believed that propagation cleavage cracks are frequently deflected as they cross an acicular ferrite microstructure with its different orientation and this increases mechanical properties, especially toughness.
[5] Compendium of Weld Metal Microstructures and Properties. (1985), Cambridge: The Welding Institute

The structural change of loess is mainly affected by water ratio.
According to Code for Measurement Method of Dynamic Properties of Subsoil (GB/T50269-97)[10], the equivalent damaging number of vibration replaces cycling times under real dynamic loading.
Quantitative analysis of stress relaxation phenomenon of Lishi loess were done by using factor of stress relaxation(I=(σmax-σmin)/σmax).Cycle loading experiments under different confining pressures and dynamic stresses were finished, and dynamic stress time history and value of stress relaxation factors are shown respectively in figure 1 and table 3.
Seismic damage assessment and seismic subsidence of loess with Different properties.
[10] GB/T50269-97, Code for Measurement Method of Dynamic Properties of Subsoil[S].in Chinese

PP is a thermoplastic polymer widely used in various industries due to its excellent physical and mechanical properties, low cost, and ease of processing.
PC and PP can be brittle or ductile depending on several factors such as surrounding temperature, crystallization, compounding, and processing features [36].
B., Marchelli M., Peila D. (2020), Reliability analysis and partial safety factors approach for rockfall protection structures, Engineering Structures, 213: 110553
[26] Zhang W., Xu Y. (2019), 3 - Impact Simulation of Polycarbonates in Aeronautical and Aerospace Applications, Editor(s): Zhang W., Xu Y., Mechanical Properties of Polycarbonate, Elsevier, Pages 79-112, [27] R.
[30] Polypropylene: Polymerization and Characterization of Mechanical and Thermal Properties. (2020). 

The results showed that, all the 4 widened beam flange joints of the column reached the request of seismic moment-resisting of the steel frame connection, while the brittle fracture of the weld root of the ordinary specimen limited the plastic properties of beam-column joint.
In the simulation process, because the affection of the welding residual stress on the point’s final failure pattern and mechanical properties were little [4], in order to highlight the inflection of the structure of widened joints on performance of joints, the weld defects and welding residual stress effect of the joints were ignored in the analysis.
The main reasons were that the ordinary joint failure occurred in the weld section of the beam and column flange connection so that the affection of the weld construction quality, weld defect and welding residual stress and other factors were relatively big, which caused the deviation from the test values.
The parent material of the flange there was located in the heat affected zone and the performance of the material was reduced, so as to tear along the direction of the flange section in the width
(4)With respect to ordinary points, in the process of loading, the maximum Mises stress was always on the weld area of the beam column, so, plus the inevitable unfavorable factors of welding quality defects etc. brittle failure of the weld seam near the end of the column easily happened

Ferric nitrate could greatly improve the ability of bio-treatment properties for sediment.
Due to various mechanical, physical, chemical and biological processes the phosphorus from these particles can be released into the water again.
The change of redox potential in sediments was one of the most important factors controlling P mobility.
Hence, it follows that after the addition of nitrate; the nitrate should be used as an electron acceptor and greatly improved the ability of bio-treatment properties of sediment.
It can greatly improve the ability of bio-treatment properties for sediment.

However, there are numerous problems such as delamination, chipping, poor machining quality and tool wear in drilling of C/C composites due to inhomogeneous, anisotropic, wear resistance and varying thermal properties of the composites.
Proceedings of the Institution of Mechanical Engineers Part B Journal of Engineering Manufacture, 2013
Workpiece material properties are listed in Table 2.
Table 2 Properties of workpiece material Property Value Property Value Density 1.8 g/cm3 Tensile strength 75 MPa Shear strength 15 MPa Hardness(Rockwell) 65 Porosity 17-20% Thermal conductivity 37 W/mK According to the previous experimental experience and due to the limitations of the experimental set-ups (the vibration frequency was fixed at 20 kHz on the ultrasonic device and maximum spindle speed on the machining center was 6000 rpm), three machining variables (spindle speed, feed rate and ultrasonic amplitude) were chose to complete the experiments.
The drilling force is an important factor affecting the quality of machining holes and the decrease of the drilling force can effectively reduce chipping size of holes exit.

Role of various factors that affect the nucleation and growth of nanoparticles is discussed at length.
Morphology and size control of nanomaterials are key factors to improve their properties.
Extensive research has been performed to identify and control the factors that affect such equilibrium.
The factors controlling the morphologies of grown nano-particles have also been probed.
The basic operation and factors affecting the performance of QDSCs are reviewed by Tian and Gao [250].

It was found that extrusion and expansion parameters affected significantly on total soy oil yield.
Experiment data were forecasted by applying factors and levels.
They represented the linear, quadratic and cross product effects of the X1, X2, X3 and X4 factors on the response, respectively.
Therefore, alcalase was selected in this research; Total oil extraction ratio was taken as investigation index and hydrolytic conditions as factors.
Some physico-chemical properties of Moringa oleifera seed oil extracted using solvent and aqueous enzymatic methods.