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Mathematical Modeling of Optimization Process for Shell Mold Material Physical Properties and Structure V.I. 
Based on the results of modeling the processes of predicting possible shell mold destruction conditions, the most important parameters and factors of crack formation are established and approach to study of new shell mold fabrication processes is defined.
Assume the shell mold consists of a finite set А of layers St, ; with properties (7), except for one layer Sk with properties (9), Sk = S*, S*.
Cherepnin, Temperature Factor Effect on the Stress-Strain State of a Shell Mold, Izvestiya.
Sviridov, Mathematical Modeling of Casting in Ceramic Shell Molds, Innovative Mechanical Engineering, Moscow, 2020

These precipitates were essential as a factor determining ductility properties both under creeping conditions and at room temperatures.
Thus the slip at grain boundaries is no more the main factor affecting the process of decohesion phenomena.
This guarantees high strength properties.
Fig. 4 shows the influence of the volumetric content of this phase on the mechanical properties.
Factors affecting this phenomenon are the supercritical temperature, the time a material is subject to it and the waste gas chemical attack.

This paper studies how the addition of Carbon nanotubes (CNT) influencing the properties, especially the mechanical properties and colorimetry of ethylene propylene diene rubber (EPDM)/SiO2 composites.
Though there are many literatures about the mechanical and electrical properties of polymer before and after the addition of silica particles[7].
Newly carbon nanotubes with different length can also greatly affect the mechanical and electrical properties.
Gaafar, Effect of Different Types of Carbon Black on the Mechanical and Acoustic Properties of Ethylene-Propylene-Diene Rubber, J.
Al-Gahtany, Mechanical properties of styrene butadiene rubber-/ethylene propylene diene monomer rubber-based conductive blends, J.

In this investigation, LF21 plate with a thickness of 2mm was welded utilizing the pulsed laser welding and the mechanical properties of the laser welded joints are analyzed.
Working current（A） Pulse width（ms） Pulse frequency(Hz） 1 200 2 2 2 200 4 4 3 200 6 6 4 250 2 4 5 250 4 6 6 250 6 2 7 300 2 6 8 300 4 2 9 300 6 4 10 350 2 2 11 350 4 4 12 350 6 6 13 400 2 4 14 400 4 6 15 400 6 2 Mechanical properties analysis In this investigation, the mechanical properties was measured by WDW3200 Universal Testing Machine.
The mechanical properties of experimental data are shown in Table 3.
Table 3 Mechanical properties of experimental data of welded joints No.
Conclusions Aluminum alloy LF21 laser welding has been successfully demonstrated utilizing the pulsed laser welding and the mechanical properties of the laser welded joints are analyzed.

Introduction The fiber cement based composites is a material obtained from a series of physical-chemical reaction of cement and other mineral admixture after adding water, having certain mechanical strength, and integrity is a prerequisite to ensure its mechanical properties[1~2].
Bonding properties between fiber and cement is foundation for fibers.
This is mainly because the limits of the polypropylene fibers, which have the properties of short, fine and soft.
A study of the mechanical properties of short natural-fiber reinforces composites [J].
A study of factors affecting the fiber-matrix bond in steel fiber reinforced concrete [J].

Influence of Plasma Radical Nitriding on Fatigue Properties of SCM435 Steel Nu YAN 1, a, I.Lee 2 , R.Murakami1 , D.Yonekura 1, J.Sun 1 and S.Fukui3, b 1 Department of Mechanical Engineering, The University of Tokushima, Japan 2 Department of Materials & Metallurgical Engineering, Dongeui University, Korea 3 Department of Mechanical Engineering, Takamatsu National College of Technology, Japan a yannu@me.tokushima-u.ac.jp, bfukui@takamatsu-nct.ac.jp Keywords: Plasma radical nitriding; SCM435 steel; Fatigue strength; Fish-eye fracture; Stress intensity factor.
The effect of plasma radical nitriding treatment on fatigue properties of SCM435 steel in super long life region was investigated.
However, the effect of this surface modification on fatigue properties in super long life regime is not clarified [5, 6].
It is clear that the nitriding treatment affects the fatigue strength.
Conclusions The effect of plasma radical nitriding on fatigue properties of SCM435 steel was investigated by using rotating bending fatigue test machine.

The oil contained in coffee dregs can promote adhesion and the formation of aggregates, affecting their dispersion in the polymeric matrix, and consequently affecting the mechanical properties of the composites obtained [24].
Leow et al. [26] reported a decrease in the mechanical properties of an epoxy resin, with the addition of both OFCDs and CDs.
Determination of mechanical properties.
According to Chang et al. [24], the presence of oil in coffee dregs can promote adhesion and aggregation of the particles, affecting their dispersion in the polymer, and consequently affecting the mechanical properties of the composites.
Production of polyhydroxybutyrate (PHB) and factors impacting its chemical and mechanical characteristics, Polymers 12: 12 (2020) 2908.

Numerous approaches have been used to improve the mechanical properties of the Co-Cr-Mo alloy [1, 2].
The elimination of casting defects by thermo-mechanical treatment supplies a means of improving the mechanical properties of the alloys; significant improvements are obtained by hot isostatic pressing (HIP) of cast alloys.
Thus it is important subject to reveal the mechanical properties of the Co-Cr-Mo-C alloys without Ni as a function of C contents.
These mechanical properties are greatly improved in forged samples.
Alternative factors, however, affecting the wear properties, such as phase stability, difference in crystal structure and so forth, have to be considered to reveal the relevant mechanisms of the wear.

In order to apply original timber more effectively, the physical and mechanical properties of timber from camphor wood were tested.
It is well known that the loading carrying capacity and ductility of wood structure are influenced by many factors such as knots and initial cracks [11].
Specifically the study comprehends the performance of wood, the efficiency of composite action and increasing degree of deformation capacity, masters the failure pattern and mechanical properties of constrained specimen.
The mechanical properties of materials are shown in table 1.
Mechanical properties of AFRP materials Tensile strength /MPa Mass area ratio /g/m2 ductility /% Elasticity modulus /GPa AFRP 2980 280 2.7 103 FRP Reinforcing Arrangements.

Abstract Hardness measurements can simple, but very useful provide materials mechanical properties.
This is a test that is extremely localized in volume and does not affect significantly the structural properties.
This steel is used for its properties primarily for welded structures as basic material.
Basic mechanical properties are given below in table 2.
F., Vander Voort, Factors that Affect the Precision of Mechanical Tests, USA, (1989) 495-506