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Introduction While the manufacture of welded pipes the base metal (BM), the heat-affected zone (HAZ) and the zone of welded joint metal (ZJM) in the forming process, calibration, expansion, and hydraulic testing are exposed to the significant plastic deformation, which can substantially affect the reduction of the bearing capacity of the different zones of a welded joint and a pipe in general.
The result is a hardening of metal in HAZ, the plastic properties reduce and the pipe failure can cause.
The influence of the broadening and ovality of the pipe, reinforcement of welded joints and other factors influencing the plasticity zones of the weld joint was tested.
It is established that regardless of various factors ZJM is plastically deformed mainly only at the stage of forming the ring (Fig. 2).
In addition, the formation of the plasticity zone of welded pipe joints may show the influence of mechanical, structural and geometric heterogeneity of a welded pipe joint.

Therefore, we must show city cultural characteristics of the city from urban design and landscape point of view according to the spatial size, environmental characteristics and cultural characteristics of the times and other factors during the construction of public facilities.
It mainly embodied as that public facilities are fair to all users without affecting by the limitation of factors such as physiological difference, gender, age, religion background, education degree.
This is the difference between public facilities and the private property.
Beijing: mechanical industry publishing house, 2009 [4] He zhengyou, NingLing.
Beijing: intellectual property press, 2003

These favorable properties endow magnesium alloys with great potential to reduce energy consumption in the automotive, aerospace and other industries.
Hence, considerable effort has been devoted to explore approaches to achieve enhanced material properties.
The quasi-static tensile mechanical properties of the materials fabricated corresponding to a strain rate of 10-4 s-1, were determined using an Instron 8874 universal testing machine.
These results indicate that: (1) the addition of nanoparticles to the matrix improves the tensile mechanical properties; (2) the nanoparticles do not affect the hardening behavior of AZ31 - i.e. the dominant plastic deformation mechanism in the matrix material is not altered.
However, the manner in which the nanoparticles interact with the matrix material at the micro scale to generate a constant increase in the tensile properties is still unclear, and further investigation is required; (3) the effect of the nanoparticles on the tensile mechanical properties may be rate independent.

However, because of the absence of factors preventing grain growth a nanostructure cannot be formed in this case.
The improvement of mechanical properties is most effective in the case of pure metals.
The mechanical properties of the SMC billet were also excellent.
The increase of patent number may be the result of two factors: • The research has led to applications
• Mechanical and multifunctional properties to be exploited in high value MEMS.

The material properties and input parameters for these two material models are shown in the following tables: Table 1 Orthotropic elastic properties of pultruded GFRP profiles [8] 28870 3505 2980 0.21 0.011 0.013 Table 2 Orthotropic damage initiation of pultruded GFRP profiles [8] 301.198 310.785 29.78 31.97 33.0 33.0 Table 3 Fracture energies for pultruded GFRP profiles 12.5 12.5 1.0 1.0 Table 4 Properties of geopolymer concrete [2] Cross-section, [mm] Modulus of elasticity, [MPa] Poisson’s ratio Maximum compressive strength, [MPa] Maximum tensile strength, [MPa] 170 × 80 19000 0.14* 40 4.0* *Assumed The concrete damaged plasticity model was chosen to model the inelastic behavior of geopolymer concrete.
The value of dilation angle could be affected by different factors, such as the failure compressive strength, the shape and size of aggregates [14].
The relationship between the dilation angle and the internal friction angle is another factor to determine the value of dilation angle.
Mesh sensitivity is an important factor for a numerical analysis.
Jensen, Mechanical properties of high strength concrete and application in design, Proceeding of the Symposium of on Utilization of high strength concrete, Trondheim, 1987, pp. 149-159

Low Velocity Impact Response of Composite/Sandwich Structures Akshaj Kumar V1, a *, P Surya1,b and MK Pandit1,c 1School of Mechanical Sciences, IIT Bhubaneswar, Bhubaneswar, 751013, India aakv12@iitbbs.ac.in, bps14@iitbbs.ac.in, cmihir@iitbbs.ac.in Keywords: Dent resistance, Mild steel, HDPE, LDPE, Polypropylene, Porous PU foam Abstract.
Sandwich structures are lightweight and exhibit the same strength properties as the conventional materials.
Dent resistance is affected by many factors and it is dependent on yield strength as observed by Shi et al. [2].
Zhigang, A research progress of dent resistance for automobile body panels, Chinese Journal of Mechanical Engineering.

Cutters Plane Layout Design of the Full-Face Rock Tunnel Boring Machine (TBM) Based on Multi-spiral Layout Pattern Junzhou Huo1, a, Haifeng Zhao2,a, Xu Zhang1,c , Wei Sun1,b, Yu Zhao2,b 1 School of Mechanical Engineering, Dalian University of Technology, Dalian 116024, P.R.
Optimizing the layout of the cutters is the most effective way to improve the global performance of a TBM[1], and directly affects TBM’s boring performance, service life, main bearing of the cutter head, the degree of the vibration and noise.
The CSM computer model[2] for hard rock TBMs is based on the cutter head profile and rock properties.
So based on Eq., if the factor and the initial angle of the spirals are determined, the position angle can be determined by Eq..
Journal of Mechanical Science and Technology, 24(2010), p.521

In particular, several factors could adversely affect the desired results, such as the mechanism of joint assembly, fabrication tolerance of adherents and curing method.
In this project, tensile test was carried to identify the mechanical properties of an tubular adhesive joint such as maximum shear strength.
Joining techniques for aluminium spaceframes used in automobiles Part II - adhesive bonding and mechanical fasteners.

Xie 1,d 1 School of Mechanical & Electrical Engineering, Suzhou University of Science &Technology, Suzhou 215011, China 2 Department of Basic Courses, Global Institute of Software Technology, Suzhou 215163, China a yinzhen12@mail.usts.edu.cn, blih_haut@sohu.com, c158815035@qq.com, d xieou@126.com Keywords: FEM, Ultrasonic, Vibration, Internal Grinding, Simulation Abstract.
In the structure on the vibrator formerly used, the transducer, horn and tool are designed separately based on the mechanical vibration theory according to predetermined frequency, and then the three are connected.
The workload of design, manufacturing and amending is very heavy, and the method is difficult to achieve the whole resonant, so the problems affected the development of its industrial application [1-4].
Modal analysis is used to dope out the vibration characteristics of the vibrator system, natural frequencies and vibration mode of the vibrator are the important properties in ultrasonic vibration system [7].
The vibration amplitude of abrasive wheel is one of the primary performance factors in the process of UVG, The vibration frequency, amplitude and the mode on the wheel's end and flange have been tested by using the PSV-400 laser Doppler vibrometer (Fig.12).

The heating rate affects the yield of the pyrolysis process.
Drop test The drop test is a key method for assessing the mechanical strength and durability of briquettes.
Conclusion Briquettes made from cow manure, influenced by temperature variations, will affect their calorific value.
Kane, “Pilot-scale grinding and briquetting studies on variable moisture content municipal solid waste bales – Impact on physical properties, chemical composition, and calorific value,” Waste Management, vol. 125, pp. 316–327, Apr. 2021
Riwu, “Physico-chemical Properties of Biocharcoal Briquettes Blend of Goat Manure Charcoal, Saboak Shell and Lamtoro Twigs,” International Journal of Current Science Research and Review, vol. 07, no. 02, Feb. 2024