Search results

Several factors that affect crashworthiness are the absorptive energy value of a structure including the load from the impact force, the crash initiator (trigger from the folding direction), the geometry of the shape of the object, the type of material and the mass of the specimen [2, 3, 4, 5, 6, 22].
While here it is studied for the influence of elliptical holes on 2 opposite sides which affect the horizontal hinge line, with the following calculations: Fig. 3.
So, the equation is A1 = 322 .cotαpeak . 12– 12 2 tan2αpeak +1–12+12 2 tan2αpeak +1+1  ..... (29.a) A3 = 8cotαpeak . 1+sin2αpeak ..... (29.b) Whereas for A2 it is influenced by the value of E2 on the horizontal hinge line and also the influence of elliptical shape was affecting the weight values on a and b. so we get the equation, A2 = (0.001) 8 - π. a. b CHsinαpeak ..... (29.c) 2.4 Size and dimensions of models As for size of the model specimen was based on reference [20].
As for its material properties are Young's modulus (E) is 195 GPa, density(ρ) is 7850 kg/m3, and the value of yield stress (σy) is 265 Mpa [20].
Ly, "Analytical Prediction of Square Crash Box Structure With Holes Due To Impact Loading," presented at the Regional Conference on Mechanical and Aerospace Technology, Kuala Lumpur, 2013.

Important features which characterizes them are their amorphous structure and unique mechanical properties.
This effectively can be used for the evolution of preferred phases and thereby can be used to affect the properties of the alloy.
Thadhani, Mechanical properties of bulk metallic glasses.
Shiflet, Mechanical properties of iron-based bulk metallic glasses.
Vander Sande, The effects of devitrification on the mechanical properties of Cu46Zr54 metallic glass.

Liu College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China, wangzhuo_heu@hrbeu.edu.cn Keywords: Horizontal pipes connector, Flanges contact , Mechanics Analysis,Sealing ring Abstract.
The contact property of mechanics and sealing ring between the two flanges was analyzed, which was used finite element method, and obtained permissible compressive force and displacement of the sealing ring to realize sealing.
In general, the selection of contact stiffness should be large enough to ensure contact osmosis small to be acceptable, while, at the same time, the selection of contact stiffness should be small enough not to cause the ill-conditioned problem of the total stiffness matrix and to ensure the astringency. a real constant FKN can be used to specify a proportionality factor which is usually between 0.01~10 or a true value for the contact stiffness.
Through several repeated experiments from small to large, the contact stiffness that is used in this analysis is 0.1, which can not only ensure contact analysis not affected, but also close to the actual situation.
For the second load, firstly, two flanges are not affected by force and are turned to be the initial state.

The microstructured-layer in the middle of the model consisted of three phases of unique material properties: the fibre, the matrix and the fibre-matrix interface.
The material properties of the infinite elements were set to be the same as the EHM.
Material Properties and Simulation Conditions.
The material properties used in the FE analysis are given in Table 1 [7, 9, 17], and the cutting conditions are listed in Table 2.
It is clear that the frequency affects the fibre fracture significantly.

Thin strip profile control capability of roll crossing and shifting in cold rolling mill Abdulrahman Aljabri1, a, Zhengyi Jiang1, b, Dongbin Wei1,c, Xiaodong Wang2,d and Hassan Tibar, e 1 School of Mechanical, Materials and Mechtronic Engineering, University of Wollongong, Wollongong NSW 2522, Australia, 2Shougang Research Institute of Technology, Shougang, Beijing 100144, China aada507@uowmail.edu, bjiang@uow.edu.au, cdwei@uow.edu.au, dx_d_wcumt@163.com, ehbt796@uowmail.edu.au Keywords: Work roll crossing; Work roll shifting; Strip shape and profile; Thin strip Abstract.
Indeed, the strip shape control naturally is to improve the strip profile using some advanced technologies, so it is very necessary to study the factors affecting the strip profile.
In the development of high accuracy and high efficiency rolling technology, the PC mill not only significantly improve the capability of the shape, crowns control and reduce the edge drop, but also enhance the mechanical properties and productivity [3].
This reaction affects the forces over the strip and makes them more uniform, which lead to increase the strip crown control range as shown in Fig.9 and to avoid asymmetrical roll wear.

Based on the literature, it is shown that the cooling medium used during the quenching process will have a significant effect on the cooling rate so that it will affect the resulting microstructure and mechanical properties [5].
Nanofluid stability is an important factor that must be considered because it can affect the thermal conductivity of nanofluids.
Eatemadi et.al., “Carbon nanotubes: properties, synthesis, purification, and medical applications,” Nanoscale Res.
Metselaar, “A review of nanofluid stability properties and characterization in stationary conditions,” Int.
Al Abas Siba, “EFFECT OF SURFACTANT ADDITION ON THE NANOFLUIDS PROPERTIES: A REVIEW,” Acta mech.

Cox2,m 1Department of Mechanical and Industrial Engineering, University of Brescia, V.
Ti-6Al-4V alloy, which is most used for the fabrication of orthopedic prostheses, is of particular interest for its mechanical properties [5,6].
Factors Levels Values Power 3 50 W 100 W 150 W Scan speed 3 750 mm/s 1125 mm/s 1500 mm/s For each of these nine combinations, three repetitions were performed: in total, therefore, 27 specimens were printed. 3.
Ceretti, “Mechanical characterization and properties of laser-based powder bed–fused lattice structures: a review,” Int.
Birbilis, “Understanding the effects of PBF process parameter interplay on Ti-6Al-4V surface properties,” PLoS One, vol. 14, no. 8, pp. 1–24, 2019, doi: 10.1371/journal.pone.0221198

Water hardness caused by calcium ions in water can affect the properties of food including aroma, texture, flavor and appearance.
These modifications will improve the properties of chitosan in terms of the chemical stability, biocompatibility, hydrophilicity, and also pore size [8].
Thus, the modification by cross-linkage may stabilize chitosan in acid solution and enhance its mechanical properties [8-13] .The ground water may have different qualities from one location to another.
Based on the different surface characterization, it could be suggest that the adsorption behaviors should be affected from these physical properties.
Moreover, the Langmiur constant was used to calculated the RL, a dimensionless separation factor, to confirm the Langmiur model of adsorption at the 100 to 1000 mg L-1 of initial concentration of calcium ions.

The present study aims to investigate the mechanical behavior of the cannulated screws with two different angles of placements which are 135o and 150o in inverted triangular configuration for management of femoral neck fracture via finite element method.
Table 1 Total number of elements and nodes for each model Model Total number of elements Total number of nodes Proximal femur model with screws at angle 135o 405137 104632 Proximal femur model with screws at angle 150o 409889 106288 Material Properties.
The material properties for cannulated screw model, cancellous and cortical bones were appointed as homogenous, isotropic and linear elastic materials.
Lian, "Risk Factors for Nonunion in Patients with Intracapsular Femoral Neck Fractures Treated with Thre Cannulated Screws Placed in Either a Triangle or an Inverted Triangle Configuration," Journal of Bone & Joint Surgery, vol. 95-A, pp. 61-69, 2013
Patwardhan, "Does screw configuration affect subtrochanteric fracture after femoral neck fixation?

Frame elements, descriptive of decks and piers, were modeled assuming a generic section defining the mechanical parameters according to the actual geometry.
In particular, in the case of retrofit with seismic isolation the link is Friction Isolator [12,13] that allows to relate the shear response to the frictional properties, the radius of curvature and the axial stress on the device.
In the following tables are shown the mechanical properties of the supports considered in the models (Table 1, Table 2, Table 3): Table 1.
Current state - Mechanical characteristics of elastomeric bearings Fzd (kN) Ko (kN/mm) Kv (kN/mm) 1250 3,43 1114 Table 2.
In particular, the dynamic response of the piers heavily affects the seismic response also in the retrofitted conditions.