Search results

Although some studies have focused on using the unique structures of plants leaves in structural optimal design to get favorable mechanical properties [10].
Bionic Model for Thin-walled Stiffened Plate One model is needed to satisfy the difference in mechanical properties between vein and ground cells, and to deduce the growth of the veins perfectly.
Discrete plate-beam method based on finite element method was selected to build analysis model with the boundary conditions for solution that regard plate and reinforcement as shell and beam element properties respectively.
That was built upon the following rules: (1) cell walls are viscoelastic and elongate under turgor pressure; (2) the mechanical properties of vein cells are different from those of ground cells; this assumption is essential as it induces the inhomogeneous mechanical stresses that drive the reorganization of the venation network; (3) cells divide when they reach a threshold area; (4) new veins appear when the areoles reach a threshold area [13].
Above all, using the excellent adaptability of the plants to get the bionic structures is not only the key to optimize mechanical property, but acoustic performance.

The article discusses the spatial analysis of the chemical soil properties that is a key component of the agriculture ecosystem based on satellite images.
The soil type of Sanam mountain region is rocky, most of the rocks suffered from mechanical and chemical erosion factors due to rain and wind, and the great discrepancy between day and night temperature, which has a noticeable effect on the mountain rocks and the surrounding regions.
The spatial analysis of TDS, EC, and pH for the soil are influenced by structural factors, such as climate, parent material, topography, soil texture, and other natural factors.
Hussain, "Study of Some physical and chemical properties of sand dune of lower Mesopotamian Plain," Ibn Al-Haitham Jour. for Pure & Appl.
Al-Khuzaie, "Physio-chemical properties of tidal flats sediments In iraqi coastline, northwest of arabian gulf," Iraqi Geological Journal, vol. 53, no. 2E, pp. 107-116, 2020

In microalloyed steels, especially in multiphase steels, the mechanical properties are adjusted by combination of microstructure components with different levels of theirs mechanical responses, including hardness and ductility.
The results of experimental studies are integrated with computer modelling and dislocation theory to provide insight into the unprecedented combination of properties achieved in certain multiphase steels such as ultra-high flow strengths, good ductility and workability.
This leads to gradient in both deformation and microstructure what in turns makes the prediction of the microstructure evolution and properties across the plate volume difficult.
Modelling As it was already mentioned the key factor for computer modelling process is selection of an appropriate rheological model.
In the case of microalloyed steels, the presence of the precipitation and solid solution strengthening mechanisms significantly affects the hardening process, mostly due to the retardation of dislocation substructure formation process.

Their application makes possible mass reduce, load capacity increase, improvement in the mechanical properties when it is possible.
Aluminium-magnesium alloys present good mechanical properties at moderate mechanical efforts (400 to 700 MPa) and good corrosion resistance.
The Al-Mg alloys have special attention due, not only to the lightness of the material, but also to certain mechanical properties and reciclability.
Such alloys cause good mechanical properties in moderate mechanical efforts (400 to 700 MPa) and good resistance to the corrosion [1-5].
The mechanical properties of the Al-Mg-Nb alloys, in laboratory scale [10], are very superior to register for most of the aluminium alloys.

Then, the frequency of electronic ionizing collision, ambipolar diffusion coefficient Da and concentration distribution of charged particles will be analyzed to obtain the key factors that affect the discharge density and light up voltage of the CRFHCP plasma discharge.
According to Eq. (4) and (5), the key factors to affect CRFHCP light up voltage and discharge density are the structure of hollow cathode, gas pressure, rf electric field and gas property and so on.
Then, the hydrophilic properties after treatment were tested to characterize the reasonableness of different design scheme.
As the variation of particle concentration directly affects the efficiency of surface treatment of materials, the variation of particle energy directly affects the quality of surface treatment.
Materials for Mechanical Engineering, 2011, 35(8):70-74

The surface properties such as roughness, hardness and topography of orthodontic archwires may affect the sliding mechanics by influencing the coefficient of friction between the archwire and bracket [1].
Previous studies [3, 4] have reported the composition, transitional temperature range, and mechanical properties of several commercial NiTi orthodontic archwire.
This solubility allows alloying with many of the elements, which can be utilized to modify both the mechanical properties and transformation properties of the system [3, 4, 5].
Therefore, factors such as nickel content, aging, thermo-mechanical treatment, and addition of alloying elements that affect the structure, are important for controlling the memory behavior of these wires [3, 4, 6].
Triple stranded stainless steel wire evaluation of mechanical properties and comparison with titanium alloy alternatives.Angle Orthod. 57:18-32. (1987) [3] Dechkunakorn S, Isarapatanapong R, Anuwongnukroh N, Chiranavanit N, Kajorchaiyakul J, Khantachawana A.Mechanical properties of several NiTi alloy wires in three point bending test.

There are many studies performed to optimize the parameters of pultrusion process in order to improve the properties of the pultruded profile either in terms physical or mechanical properties.
Table 3 The effect of factors at different levels for pultruded kenaf reinforced vinyl ester composites.
Al-Zubaidy, Properties of natural fiber composites made by pultrusion process, J.
Vaughan, An analysis of factors affecting pull force for the pultrusion of graphite/epoxy composites, J.
Okuno, The effect of filler loading and morphology on the mechanical properties of contemporary composites, Prosthet.

Abstract:- Surface mechanical attrition treatment (SMAT) technique became popular to develop a nanostructured surface layer on metallic materials for upgrading their overall properties and performance.
Introduction Nanocrystalline materials have improved properties, like wear resistance, yield strength, hardness.
Nanocrystalline surface layer can enhance the physical and chemical properties of the components.
Enhanced physical and chemical properties are the results of this gradient microstructure of SMATed cross-sectional surface.
SMAT can be the remedy to enhance their properties.

Mechanical properties, (macro/micro) structure were investigated for the process variables recorded in Table 2.
The heat affected zone (HAZ) lies closer to the base metal (BM) and it may encounter a thermal cycle that changes the microstructures and/or the mechanical properties due to over-aging without any plastic deformation.
This zone may encounter a thermal cycle due to welding without changing its microstructures or mechanical properties.
Also, the fully bonded length was confirmed to be the main factor affecting the mechanical properties.
Hook formation and mechanical properties of friction spot welding in alloy 6061-T6. 

Morphology of graphite affects the mechanical and physical properties of cast irons.
The morphology of graphite is generally quantified by the percent nodularity and/or graphite shape factors (e.g. roundness, sphericity, compactness, aspect ratio).
However, the nodularity is also affected by the cooling rate and the sulfur level.