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Through axial load bearing capacity test of eight steel & steel pipe reinforced concrete composite columns, the working mechanism, the ductility and the ultimate bearing capacity of the composite columns were studied, and the main factors affecting the performance of the composite columns are discussed, including concrete strength and the ferrule coefficient.
In the steel reinforced concrete columns, the steel is wrapped in concrete and thus improves the shear capacity of the columns[1], whereas the concrete increases steel stiffness and its resistance to local and overall buckling, and meanwhile improves the durability and fire-resistant properties of the columns.
Fig.1 Load-displacement curves of axially loaded composite columns Fig.2 Typical N-△ curves of axially loaded composite columns Analysis of all factors affecting the axial compression performance of the composite columns.
By comparing SJ2-1 and SJ4-2, we can see that for steel & steel pipe reinforced concrete composite columns with the same indices, with the increase of core concrete strength and due to changes in the mechanical properties of concrete, the magnitude of the bearing capacity improvement trends to be less.
This shows that such structural parts have a stable later stage bearing capacity and good deformation properties

The findings suggest that optimizing these factors can significantly enhance the properties of MMSs and contribute to their durability.
Steel after heat treatment at 650 °C showed excellent mechanical and impact properties.
These changes highlight the importance of optimizing the microstructure to improve the mechanical properties of the alloys.
The heat treatment of these samples was carried out at different temperatures, which affected their resulting microstructural and mechanical properties.
Jiang, A review of key factors affecting the wear performance of medium manganese steels, Metals 13 (2023) 1152

Banana/Hemp Polypropylene composites with and short fibre were compared in terms of mechanical properties by the same authors [3], [4].
Because of the continuous threads, the mechanical properties of banana/Hemp Polypropylene composite were shown to be superior.
The analysis results shed light on thermal properties of the composites.
Essential factors that can limit the use of composites, notably in the construction and automotive sectors, are their heat and flammability properties.
Many studies have examined the mechanical behaviour of Hemp hybrid composites, but far less attention has been paid to the composites' flammability and thermal properties.

Compared to silicon, GaAs has its own properties: high frequency, characteristics of luminescence and light interception, electromagnetic character and sensing property etc [2].
So it makes the wafer polishing to be one of the main factors in the GaAs product manufacturing [7, 8].
Effects of Technological factors The major technical parameters of GaAs wafers are as follows as thickness, TTV (total thickness variation), TIR (total indication reading), warp, surface residue particle size, and so on [11,12].
Its polishing technology is related to the technological factors, such as the type of slurry, slurry’s concentration, slurry’s pH, agent particle size and potency, load, and the polishing machine’s velocity.
Generally, the mechanical action of slurry plays a significant role initially.

It was thought that these bound- aries come from some kinds of mechanical stress because single-crystal plates are quite uniform from the viewpoints of the investigation on the chemical compositions and the physical properties analyzed by XRD etc. in the plates [6].
Table 2 shows dielectric and piezoelectric properties in PMNT70/30 single-crystal plates and ceramics.
Table 2 Dielectric and piezoelectric properties in PMNT70/30 single-crystal plates and ceramics after DC poling.
Figure 12 shows the effect of grain boundary between PMNT single-crystal plates and PMNT ceramics; elastic constants vs. various kinds of coupling factors (k) such as kp (planer coupling factor in ceramic disk), k31, k32 and kt in the single-crystal plates.
Kuwata et al., Dielectric and piezoelectric properties of 0.91Pb(Zn1/3Nb2/3)O3-0.09PbTiO3 single crystals, Jpn.

Heterostructures, which destructed under the action of external physical factors and kinetics of formations of porous defects in silicon substrates, were analyzed.
Such transformations were observed after affecting for 360 seconds at room temperature.
Electric field is non-uniformly affecting the porous defect: maximum value in the centre of defect bottom and zero on its walls.
Canham: Properties of porous silicon.
Calcott: The structural and luminescence properties of porous silicon.

The Influence of Different Natural Fibers on the Mechanical Properties of Geopolymer Shengjie Zhou1,2,a, Yan Zhang1,2,b, Zihao Feng1,2,c, Fei Bi1,2,d and Liang Fan1,2,e* 1Shandong Transportation Institute, Jinan 250031, Shandong, China 2Shandong Province New Road Materials and Technology Engineering Laboratory, Jinan 250031, Shandong, China azhoushengjie@sdjtky.cn, bzhangyan@sdjtky.cn, cfengzihao@sdjtky.cn, dbifei@sdjtky.cn, efanliang@sdjtky.cn, Keywords: Geopolymer; natural fiber; mechanical strength; water absorption; shrinkage.
Based on the modification of geopolymer, this paper also carried out the research on the effects of different natural fibers such as coconut shell, banana, bamboo fiber, sisal, jute, ramie and sisal on the properties of geopolymer, hoping to modify the geopolymer concrete mechanical properties and provide sufficient reference data.
The additives were selected from seven kinds of natural fibers as the influencing factors.
In terms of mechanical properties, the addition of natural fiber made up for the characteristics of high brittleness of geopolymer materials and easy drying and cracking of the surface.
Low in: Thermal and mechanical properties of cotton fabric-reinforced geopolymer composite.

There are many factors which affect WEDM-HS quality and efficiency,such as pulse power supply parameters, including peak current, pulse spacing, pulse width, and the open-circuit voltage and discharge waveforms; and tool electrode parameters, including the wire electrode diameter, tensile strength, and yarn tension, etc.
In addition, there are concerned with the process system factors, including wire feed speed, working fluid, mechanical wear, liquid pressure, clamping means, etc[1-2].
Entropy weight fuzzy evaluation From comprehensive evaluation of mechanical processing,the method that many factors one by one are analyzed affect evaluation accuracy.
Entropy was used for fuzzy evaluation, which can effectively solve uncertainty problem in fuzzy factors.
Influence of material properties on machining quality in quick-speed wire_shifting edm[J].Die and Mould Industry, 2006,32(5):61-63

Introduction Usually the optimization of the mechanical properties, to achieve high strength, good toughness and weldability, is achieved by the production route of Thermomechanical Controlled Processing followed by accelerated cooling.
Since procedures such as welding and hot bending can involve temperatures up to the austenitization range, and thus affect the mechanical properties, the objective was to correlate the effect of different cooling rates on the microstructure and mechanical properties.
Mechanical properties were also evaluated by microhardness measurements and, at this stage in the study, the tensile strength values were estimated from the hardness Rockwell B hardness measurements.
Among the several factors that can contribute to an increase of strength in HSLA steels grain refinement [2 -5] probably represents the biggest contribution for the steels studied in this work.
Bhadeshia, Steels - Microstructure and Properties, Second Edition, Butterworth-Heinemann, 1995 [4] K.

The rheological properties of propellant are several key factors in the process design, which affect the quality of propellant processing that determines the weapon's performance.
Weapon performance and energy release efficiency are affected by molding size, mechanical properties and molding quality of propellant.
Rheological parameters affect the rheological properties and the quality of formed propellant during the forming process.
Effect of NGu content on the rheological properties of the dough.
Figure 3 lnη – lnγ curve of different NGu content at 30 ℃ Effect of solvent ratio on the rheological properties of the dough.