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The establishment of seat model Seats static strength analysis of the model can be divided into the following steps: (1) The establishment of the geometric model of seat structure; (2) Choose a variety of seat structures used to simulate and connected finite elements; (3) The Finite Element discretization of the geometry of the seat, and the finite element mesh; (4) Define the elements and material properties; (5) Based on test results, verify and confirm the final simulation model.
To the late analysis and solving, it has a direct effect, which can affect the simulate accuracy and efficiency.
To ensure accuracy, the model must be able to truly reflect the geometric properties of seats and mechanical properties.
In order to improve the efficiency of simulation, modeling must also be considered in the unit type, quantity and quality and other factors.
Fig.1 Back and Seat Area are divided by quadrilateral element Fig.2 The intersection of the backrest and cushion are divided by triangular element Define properties of cell material: We need define the unit that includes element type, real constant, material properties.

It has strong compression, shearing force, anti-permeability, and other good physical properties, the engineering characteristics depends on the joint role of coarse grains and fine grains.
The Main Factors of Affecting the Engineering Characteristics.
For mixture, close compaction need more ramming strike force, so we learn foreign experience and combine the domestic actual situation to choose appropriate mechanical tools.
Fig. 5 Ramming work Fig. 6 Rammered earth houses with mixture Conclusions In conclusion, the improvement of the traditional rammered earth construction technology should begain from the rational preparing materials, good gradation soil-rock mixture can significantly improve mechanical properties of rammered earth walls.
Study on Engineering Property of Coarse-grained Soils.

However, these techniques are difficult to apply to welds with rapid microstructural gradients because the stress-detection parameter is also highly sensitive to metallurgical factors.
Recently, an instrumented indentation technique that measures elastic/plastic deformation behavior beneath a rigid indenter as a curve of indentation load versus indenter penetration depth has been developed and applied to evaluate various mechanical properties such as contact hardness, elastic modulus [4], yield and tensile strengths, work-hardening index [5] and fracture toughness [6].
A multiple indenting procedure with three load-unload cycles at maximum loads of 98, 196, and 294 N was applied to the unstressed base metal to obtain the residual-stress-induced load shift and contact properties at different depth or load steps.
Results and Discussion Metallurgical boundaries among weld metal, heat-affected zone (HAZ), and base metal were identified by optical observation.
Contact properties evaluated from unloading curve analysis for unstressed base metal.

Modelling of Tool Wear for Ti64 Turning Operation Pawan Kumara* and Joy Prakash Misrab Department of Mechanical Engineering, National Institute of Technology Kurukshetra, Kurukshetra 136119, India apawank76@gmail.com, bjoyprakash.misra@gmail.com Keywords: Tool Wear, Turning, Titanium Alloy, Response Surface Methodology, Modelling.
Their unique physical, chemical, and mechanical properties make them suitable for various engineering field applications.
The upper level of a factor is coded as +1, center level as 0, and the lower level as −1.
But other parameter interactions are not affecting the response parameter (tool nose wear) much.
This analysis revealed that cutting speed, feed, and their interaction significantly affecting the tool nose wear.

@urfu.ru Keywords: cementing, cemented optical assembly, deformation of the optical surface, hydro-mechanical method.
Introduction The choice of cement grade, bonding technology and additional heat treatment is determined by a number of characteristics, namely: the size and type of the material to be cemented, the quality of the surfaces to be joined, the technical requirements for the joint, the cement properties.
Any of these methods must meet the following requirements: do not alter the optical properties of the connected parts, provide sufficient mechanical, chemical, thermal and light durability of the compound [1].
The difference factor TCLE in these cases is equal to zero, and TCLE of quartz glass is about 2·10-7 С-1.
Farafontova, How the state of optical surfaces before cementing affects the strength of optical assemblies, J.

The mechanical properties of the silicon carbide are as follows: bending strength RT = 490 MPa, fracture toughness Kc = 4.0 MPa.m1/2, density = 3.15 g/cm3, Young's modulus E = 400 GPa and Vickers hardness H = 24.56 GPa.
Discussion In precision grinding, the final quality of the work surface is affected by many factors, including the machine and control system, the machining parameters (e.g., speed, feed rate and diamond grit size), and the workpiece mechanical properties.
In grinding of ceramics, the grinding energy and mechanical forces may cause a severe deformation in the ceramic crystals and produces a change in the ceramic phases.

There are several factors that affect fiber size and the appearance of beads on the fiber, namely viscosity, conductivity, surface tension, and others.
The CsPbBr3 perovskite exhibits high sensitivity to polar solvents, which can lead to a deterioration of its optical properties by affecting the ligands on its surface and the overall structural integrity.
Unlike thin films, the electrospinning process employed here provides a scalable approach, retaining the light-related properties of the materials.
Popa, “The Influence of Polymer Solution on the Properties of Electrospun 3D Nanostructures,” IOP Conf.
Pradhan, “Composition related structural transition between mechanosynthesized CsPbBr3 and CsPb2Br5 perovskites and their optical properties,” Journal of Alloys and Compounds, vol. 816, p. 152612, Mar. 2020, doi: 10.1016/j.jallcom.2019.152612

Tailoring the properties of magnesium by forming new alloys or new structures has been the focus for a number of investigations [1–4].
These distinctive features make it possible to fabricate materials with novel microstructures and properties [16,17].
Limited grain growth offers mechanical property advantages related to the finer grain size of parts made from powders [20].
Hardness may not be give complete picture of mechanical properties.
The sample size was too small to get any other mechanical properties such as tensile strength, fracture toughness.

The Shape Memory Effect on Ni-Ti thin films is strongly dependent on several factors: (i) chemical composition of the matrix, (ii) presence of precipitates and (iii) preferential orientation.
Ni-Ti alloys derive their unique nonlinear and anisotropic mechanical behavior from stress-induced martensitic transformations, where the resulting strains are affected by crystallographic orientation.
Texture is known to influence the mechanical, magnetic and thermoelectrical properties of the films.
Bhattacharya and Kohn [5] have argued that crystallographic symmetry is a very important factor in determining the recoverable strains in polycrystals: alloys which undergo small change in symmetry (cubic to tetragonal or trigonal) have virtually no recoverable strains in polycrystals, while alloys which undergo large change in symmetry (cubic to orthorhombic or monoclinic) always recover at least some strain even in polycrystals.
Experimental set-up for in situ XRD The texture evolution during deposition is clearly affected by the substrate type and the ion bombardment of the growing film.

Therefore, building corporate environmental, health and safety aspects of the management capacity, not only with people's lives and property safety are closely related, but also with China's economy to the healthy and stable development has a great relationship.
Health, environment and safety is the construction of the building process in Trinity factors are indispensable.
HSE management system in building dynamic time, we need to analyze a variety of angles construction projects or quality problems, brings bodily harm and other issues, to take timely and effective way form to solve these problems and effective protection of life and property safety of construction workers, security engineering quality.
Will effectively combine all these factors, construction enterprises must take safety and health management staff working directly placed into the performance evaluation of systematic field.
Beijing: Mechanical Industry Press, 2002:345-355