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Online since: September 2013
Authors: Andrzej Kot
In addition to these constraints, factors that hamper the pace of analytical research in particular were difficulties associated with the construction of mathematical models formalizing complex electromechanical phenomena occurring during forming and the lack of computers in high-power, which could be used to carry out numerical calculations.
Further sections of the article contain an analysis of the phenomena occurring during the electro-dynamic metalworking, whose character determines the possibility of affecting a particular forming procedure.
Introduction quotes the relationship (1) that determines the force affecting a unit of length of the current-carrying wire.
Distributions of the pressures affecting the surfaces of the machined elements The pressures acting during electro-dynamic forming were calculated on the basis of the previously determined H values of the magnetic field’s intensity, occurring on the surfaces of the moulded semi-finished products.
It should be noted that before the electrodynamic forming of the majority of samples of tubes there were recrystallizing annealing, after which there was determined the material constants or values defining the mechanical properties of metals, which were pipes made.
Online since: September 2018
Authors: Svetlana V. Samchenko, Olga V. Zemskova, Irina V. Kozlova
Introduction The development of modern constructional materials with specified functional properties implies the need for a detailed study of the physical-chemical properties of suspensions derived from nanoscale materials of various nature.
Also, the molecules of sulfonaphthalene formaldehyde, concentrating in the surface layer of CNTs, form gel-like films from the radicals of the backbone chain (6), which have enhanced structural-mechanical and hydrodynamic properties, which ensures the stabilization of CNTs.
Films, possessing mechanical strength and elastic properties, prevent aggregation and fusion of particles as they approach each other, and thus cause a structural-mechanical factor of aggregative stability [14-15].
When considering the stabilizing effect of a plasticizer on a CNTs suspension, it is noted that the stabilization of nanotube particles is also achieved due to both electrostatic and adsorption-solvate factors of aggregative stability.
Vysotskaya, Influence of carbon nanotubes on the properties of polymer-bitumen binders and asphalt concrete, Vestnik MGSU. 11 (2015) 110-119
Online since: July 2014
Authors: K. Annamalai, K. Santhosh Kumar, Vinay Varghese
An analysis of variance (ANOVA) was used to find the most significant factor.
These high valued mechanical and metallurgical properties make the Inconel 718 most difficult to machine material.
The details of chemical composition and mechanical properties of Inconel 718 are shown in Table 1.
Table 1 Chemical composition of Inconel 718(wt. %) Elements C Mn Si S P Ni Cr Fe Al Mb Ti Nb Percentage (%) 0.04 0.02 0.003 0.006 0.005 52 17.96 20.8 0.5 2.7 1.03 4.93 Table 2 Mechanical properties of Inconel 718 Ultimate strength(MPa) Yield point(MPa) Elongation (%) Hardness (HRC) 1260-1390 1041-1160 14-19 40-45 Machine and cutting tool details.
The methodology of Taguchi for three factors at three levels is used for this experiment.
Online since: May 2011
Authors: Qing Song Li, Shao Ping Meng
Carbon fiber reinforced polymers (CFRP) are superior in physical and mechanical properties and ease of handling, so they are widely used in structure reinforcement and strengthening.
The present researches of prestressed CFRP-reinforced structures focus on the static mechanical properties, and whereas, little is known of the fatigue properties of the structure under the alternating loading.
It is a common failure mode, which can be avoided substantially by improving the bonding quality and enhancing the anchoring, as well as by changing the mechanical properties of adhesive layers
The basic mechanical properties (crack load, yield load and ultimate load) of flexural members can be obtained through the SM model, and the stress state of adhesive layer can be analyzed; the fatigue property (fatigue life) can be obtained through FM model.
Additionally, the elastic modulus of the adhesive layer has little effect on the analysis of mechanical properties of members, but affects the stress level of adhesive layer very obviously.
Online since: January 2026
Authors: Fernanda Caceres Lagos, Josue Diaz Sanabria, Alvaro Rodriguez Palma
In general, vehicular accidents are one of the main causes of bone fractures in dogs, affecting key structures for mobility [2].
Canine mobility is determined by anatomical structure, posture, proprioception, muscle condition, and overall functionality factors that directly influence both quality of life and life expectancy [3].
Mobility impairments in dogs often indicate underlying injury or disease and may arise from pain or mechanical issues caused by acute or chronic conditions affecting nerves, tissues, joints, bones, or organs [4].
EVA foam was used as a liner material [27, 29], given its favorable cushioning properties and ability to distribute pressure over the residual limb.
The selection of printers, filaments, and printing conditions was based on the required mechanical properties, material compatibility, and the geometric complexity of each design.
Online since: December 2011
Authors: Feng Yuan Wang, Xiao Bin Liu
The Factors Which Impact On Bus Seat Comfort There are two aspects which influence the comfort from buses, they are bus vibration and ergonomic factors.
Comfort is influenced mainly by dynamic and static factors.
The Physiological Properties of the Human Body Sitting Posture In the study of the human body feeling of the vehicle vibration, different body parts were in different stress state to feel the same vibration environment, and central nervous system would have different reactions, that were different feelings of comfort.
Generally, hydraulic or mechanical adjustment was adopted.
In running state, due to vibration and other factors, the human body was easy to slip forward, then the waist and back here to stay in an angle, the waist impended.
Online since: September 2015
Authors: Rui Qing Hao, Ping Cao, Jin Jin, Cheng Zhi Pu
By affecting the distribution of micro-cracks, the flaw changes the macro shear zone of specimens.
Due to geo-materials property of heterogeneous, before eventual failure, they suffer damage accumulation, crack initiation, propagation, interaction [2].
They find that the formation and evolution of strain localization are influenced by multiple factors including loading rate, temperature, boundary condition, initial damage and density.
These micro parameters of contact-bond and the macro properties of the corresponding reproduction are summarized in Table 1.
Chen, Mechanical behavior of rock-like jointed blocks with multi-non-persistent joints under uniaxial loading: A particle mechanics approach.
Online since: December 2011
Authors: Da Sen Bi, Liang Chu, Yun Tao Li, Jin Wu, Jian Zhang
In this paper, mechanical property, forming ability, baked-hardening and work hardening properties of high strength steel DP450 are studied by experiments, and compared with those of steel MS6000.And theoretical research on predicting the forming limit of steel DP450 by the NADDRG model.
Experimental results analysis The Mechanical properties of experimental material.
The differences in strengthening mechanism between dual phase steel and the traditional HSLA steel have led to the distinctions in the mechanical properties.
The mechanical parameters of DP450 and MS6000 steel in the experiment are shown in Tab.2, through which we could make qualitative analysis and evaluate the plate forming properties.
Intensity parameter of martensite is hard to define.The carbon content is an important factor,it affect martensite’s tensile property of DP steel obviously.Some researcher[9] adopt vickers microhardness test to measure relation between strength of martensite and carbon content.
Online since: August 2007
Authors: Luis Héctor Hernández-Gómez, G. Urriolagoitia-Calderón, Juan Alfonso Beltrán-Fernández, R.G. Rodríguez-Cañizo, G. Urriolagoitia-Sosa, A. González-Rebatú, M. Dufoo-Olvera
As a consequence, the patient has to use a collar, which supports and prevents movements, which affect the damaged zone.
Cervical Plate The Mechanical properties considered for the materials are shown in table 1.
Mechanical Properties for the FEM Cervical Model. 3.
The mechanical behavior of this material may be considered as orthotropic.
Rehabilitation Med, 4, p.110-113. (1972) [5] Holly, L. & Et. al., Cervical spine trauma associated with moderate and severe head injury: incidence, risk factors, and injury characteristics.
Online since: September 2013
Authors: Guang Qin Cui, Zeng Rong Liu, Chen Guang Ma
The structural property is mainly due to soil deposition conditions, distribution property of void and cementation between soil particles.
XIE (1999)[2] emphasized the fundamental influence of soil structure on mechanical properties of soil, which was later confirmed in many researches[3-4].
Liu etc (2002) [6] introduced 3 structural parameters to Modified Cam Clay (MCC) model to take into account the affect of soil structure.
But most traditional constitutive models have not taken these factors into consideration simultaneously.
Assessment of engineering properties of Bangkok clay.
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