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However, there are very few published papers on their mechanical properties and accuracy.
Previous studies have explored the use of metal-polymer composites in 3D printing, highlighting their potential to enhance mechanical properties.
These parameters were chosen due to their significant impact on the mechanical properties and dimensional accuracy of the printed parts.
The results highlight the importance of precise parameter control in enhancing the mechanical properties and dimensional accuracy of 3D-printed objects.
Previous studies have shown that honeycomb patterns generally offer superior mechanical properties due to their efficient load distribution.

Experimental and Finite Element Study on Mechanical Behavior of Bolted Joint with Bolt Clearance in Transmission Tower Binrong Zhua, Haijun Xingb and Jingbo Yangc China Electric Power Research Institute, Xuanwu District, Beijing 100055, China azhubinrong@epri.sgcc.com.cn, bxinghj@ epri.sgcc.com.cn, cyjb@epri.sgcc.com.cn Keywords: bolted joint, joint slip, bolt clearance, finite element analysis, experiment Abstract.
Eventually, through a comparison of FEM and test results, the factors that affect bolt slip and the changing relationship of axial force of bolt and friction force is described.
In addition, to determine the mechanical model of bolt shear slip is also the research foundation of vibration and joint fatigue of tower.
Standard tension coupon tests are conducted to determine the mechanical properties of the steel angle sections.
The results show that the FEM model can result in accurate description of the slipping process of the bolted joint, and is validated to stimulate the loading property of bolted joint, which can be generalized to the joints connected by other specifications of the bolts and plates.

However, the content of magnesium in the La-Mg-Ni-based alloy is a key factor that affects the phase structure and electrochemical property of the La-Mg-Ni-based alloy [6-9].
The main electrochemical properties of the samples are summarized in Table 2.
The phase transformation from single-phase to multiphase not only affects the activation property, but it also significantly affects the discharge capacity [3].
Jarzebski, Structural characterization and electrochemical hydrogen storage properties of Mg2Ni1-xMnx (x = 0, 0.125, 0.25, 0.375) alloys prepared by mechanical alloying.
Percheron-Gue´gan, Mechanical millingand subsequent annealing effects on the microstructural and hydrogenation properties of multisubstituted LaNi5 alloy, Acta Mater. 53 (2005) 2157-2167

However, the traditional bamboo, steel and other materials of greenhouse skeleton exist obvious deficiencies, such as shed steel material is easy to rust corrosion and the structure of the corroded steel body parts will be destroyed after saline - alkali corrosion, affecting the structural safety.
For most of the numerical simulation, we only need to provide structural geometry, boundary conditions, material properties, loads and other engineering data.
Selection principles in choosing the calculation model (Sun Defa, 2002) are: (1) The calculation model should reflect the main force and deformation properties of the actual structure
(2) Retain the main factors and omit the secondary factors that facilitate the calculation model
References [1] Liu Zhiyuan experimental study of the engineering properties of polymer grouting material (MS, ZhengZhou University,China,2007),p.17

Othman2, b 1Dept. of Mechanical Engineering, Politeknik Kota Kinabalu, Sabah, Malaysia 2Dept. of Mechanical Engineering, Politeknik Port Dickson, Negeri Sembilan, Malaysia aabdullah@polikk.edu.my, bakbar.othman@gmail.com Keywords: Crush force efficiency, Crash box, Energy absorption Abstract.
Results showed that the tube’s energy absorption was affected significantly by different number of layers wrapped on wall aluminum square profile and also that the effect of crushing behaviors and failure modes was discussed.
Introduction Capability of structural material absorbed energy is one of the main factors in their application in vehicle structures.
They also serve other multiple advantages such as well-being properties of strength, durability, weight reduction and hence lower saving economic fuel usage of vehicle [1].
Fig. 3.Quasi-static mean load (kN) versus displacement (mm) of test specimen geometry composite profile The energy absorption parameter in terms of quasi-static absorbed energy decreases as the number of layer decrease, due to the some factors which is the first initial load affect the absorbed energy with less surface contact on initial crush on the head specimen composite square tubes.

The properties of the binder system were improved by adding modifiers [3,4,5], such as boric acid, citric acid etc.
The magnesium oxide has been used frequently, but it had some weak points to the properties of phosphate sand.
The effects of compound binder on the properties of phosphate no-baked sand have been studied.
The effects of content of iron oxide in curing agent on properties of sand were studied.
[6] Zhang Youshou, Shang Hongfei, Huang Jin，Study on Factors of Affecting Strength and Stability of no Bake Phosphate Inorganic Binder Sand, Journal of Foundry Technology, 2 (2010) pp.137-139 .

Mechanical Performance between the Embedded Steel Plate and the Concrete in Composite Shear Walls CAO Wanlin 1, a, DONG Hongying1,b, ZHANG Wenjiang 1, c, and ZHANG Jianwei1,d 1College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China awlcao@bjut.edu.cn, bdonghy@bjut.edu.cn, cjimmy_2008@emails.bjut.edu.cn, dzhangjw@bjut.edu.cn Keywords: Composite shear wall, Embedded steel plate, Welded stud, Mechanical performance Abstract.
The shear bearing capacity, load-slip relationship, strains of the steel plate and studs, mechanical properties and failure mode were analyzed.
This will affect the behavior of the composite work of the two materials in cooperation seriously.
The stud construction impact factor 0.9 is taken into consider according to the test.
And the impact factor ξ is introduced considering the ratio λ of length to radius of studs.

Predictive models of gloss and lightness are established to determine the influencing factors by stepwise regression in the article.
Tin plate is non-color objects, which has lightness differences only, so its color characteristics characterized by lightness, while the geometric properties characterized by gloss.
The common factors which affected lightness are found by means of stepwise regression method and the correlation model of lightness and related parameters is given by 2 2 29.55 0.1298 16.03 ( ) 48.17 0.05 0.806 L Ra Pc LN SN P R = + − + < =
The common factors which affect lightness are tin coating weight, profile arithmetic average error and peak density of TMBP.
The common factors which affected gloss are tin coating weight, surface roughness of TMBP and peak density of TMBP.

Introduction Composite materials used in aircraft structure withstand not only complex fatigue load, but also withstand temperature, humidity, and other harsh environmental factors.
Carbon fibers themselves do not absorb moisture, and their physical properties remain unaffected.
Costa et al [4] also indicated that moisture absorption has been shown to lead to general reduction of the mechanical properties of composites.
Cândido et al [5] also reported that the degradation of physical and mechanical properties has been found to depend primarily on the total amount of moisture absorbed.
The Residual Bending Strength Test With an increase in the number of loading cycles, the accumulation of damage leads to a change in the macroscopic mechanical properties of the composite material, such as the degradation of strength or stiffness of the material [10].

At the present time, although the technology of electroplastic drawing and electroplastic rolling have been realized [2,3], the mechanism of electroplastic effect is unclear up to now and the influencing factors of electroplastic effect still lie in exploration.
In the 1960’s Troitskii and co-workers found that drift electrons can exert a force (electron wind) on dislocations and further affects metal’s plastic flow.
Conrad considered that drift electrons not only could exert a force (“electron wind”) on dislocations but also affected the process of thermally-activated dislocation motion.
Molotskii’s idea that the electron spin may participate in formation of crystal plastic properties in a magnetic field allows one to create a new effective method of plastic properties control.
The theoretical results showed that a microwave magnetic field could cause transitions between magnetic sublevels of a dislocation–obstacle pair and, influence the plastic properties of the crystals.