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Online since: February 2018
Authors: Beatrice Faggiano, Federico M. Mazzolani, Antonio Formisano, Generoso Vaiano
They are powerful analysis instruments to perform parametric studies, aiming at detecting the main factors affecting the cyclic structural behaviour, thus leading towards appropriate design criteria.
The set up CBX frame model is in fact an advanced computational tool for performing parametric analyses necessary for catching the influence of any geometric and mechanical factor.
The CBXF specimen; Testing protocol for cyclic tests; Mechanical properties [mm] [18] They were built up using welded connections.
In Figure 1 the mechanical properties of the material and the displacement histories applied for the cyclic tests are also depicted.
Four frames, namely BM0, BM5, BC0 and BC5, were tested, with the same configuration and properties, but with different loads and loading protocols, namely: with [0] and without [5] vertical loads, with Monotonic and Cyclic loading protocols.
Online since: February 2020
Authors: B. Ravi Sankar, P. Umamaheswarrao, K. Rajasekhara Babu, M. Pardhasaradhi
Results pointed out the fact that tilt angle played vital role in affecting the responses followed by feed and tool rotational speed.
Ramesh Babu et al [2] studied the effect of various welding parameters on mechanical properties during FSW of AA5083 and AA 6061.
By using mechanical clamps plates in position can be obtained and welding was performed.
The succeeding conclusions were drawn from this study · Tilt angle is the most momentous factor affecting the responses subsequently feed and tool rotational speed
Roslee, Study the Role of Friction Stir Welding Tilt Angle on Microstructure and Hardness, Applied Mechanics and Materials, 799-800 (2015) 434-438 [4] Masoud Ahmadnia, Saeid Shahraki, Mojtaba Ahmadi Kamarposhti, Experimental studies on optimized mechanical properties while dissimilar joining AA6061 and AA5010 in a friction stir welding process, International Journal of Advanced Manufacturing Technology, DOI 10.1007/s00170-016-8636-y [5] M.
Online since: September 2014
Authors: Rui Zhang
Elasto-optic constant of PMMA Measurement using linear-least squares method Rui Zhang 1, a 1 Engineering Mechanics Department of Kunming University of Science and Technology, Kunming 650500 china a26385971@qq.com Keywords: Digital gradient sensing, stress intensity factors, open mode, linear least squares, Elasto-optic constant Abstract.
Elasto-optic constant is related to known stress intensity factors and specimen thickness.
For instance, due to its good mechanical and physical properties, PMMA has been widely used in electronic screen,aircraft cockpit canopy,windshield,etc.
Theoretical stress intensity factor of opening mode is given in Eq.4.
Thus, stress intensity factor is taken as known parameter and related, are known in Eq.5.Where andare the polar coordinates of known crack tip.
Online since: March 2016
Authors: Wei Bing Sun, Cu Ming Liu
Influence of a Trace Alloying of Ag on the Ageing Behavior and Mechanical Properties of AZ80M Magnesium Alloys Weibing Suna and Cuming Liub* School of Materials Science and Engineering, Central South University, Changsha 410083, China a765839088@qq.com , bcmliu803@sina.com Keywords: AZ80 magnesium alloy, Ageing, Ag, Mechanical property.
The tensile mechanical properties of the alloys at different state are presented in Fig. 9.
Fig. 9(d) presents the tensile properties tested at 423K for alloys aged at 473K, Ag-containing alloys have better properties at elevated temperature as well.
(a) AZ80; (b) AZ80+0.5Q Fig. 9 Tensile mechanical properties of the alloys at different state.
Another crucial factor associated with the type of b-Mg17Al12 precipitates is ageing temperature.
Online since: March 2008
Authors: Igor S. Golovin, Tatiana S. Pavlova, Jürgen Göken, Tatiana V. Ivleva, Manuel Maikranz-Valentin, Kurt Steinhoff
Change of Structure and Properties of 51CrV4 Shaft Caused by Thermo-Mechanical Treatment Jürgen Göken1,a , Manuel Maikranz-Valentin2 , Kurt Steinhoff 2 , Tatiana S.
It was found that these microstructural changes were accompanied by a change of mechanical properties in terms of hardness, electrical resistivity and especially internal friction.
Specimens for structural studies and study of mechanical and physical properties were taken out from different places of the produced shaft and tested in order to verify and understand the obtained gradation.
The significant variations in properties could be explained in terms of structure and dislocation behaviour under applied cyclic stress using mechanical spectroscopy technique.
Tailored properties for bulk products are up to now realised also by powder metallurgy where compacted disks with individually different grain sizes are put on top of each other and hot pressed afterwards, e.g. [8].
Online since: June 2013
Authors: Hou Jiang Yuan, Zhou Jian Wei, Xia Zhen Yu
Mechanical properties of articular cartilage conclude follows.
Research thought the following factors will affect the performance of materials.
Mechanical properties.
Table 2 Mechanical properties of PVA-H Properties PVA hydrogel Human articular cartilage Compressive modulus E/MPa 1.1-18.4 1.9-14.4 Failure strain ε/% 45-62 30 Failure stress σ/% 1.4-2.1 - Shear modulus G/MPa 0.17-0.43 0.23 Mechanical and electrochemical properties.
Summary PVA-H material has good biocompatibility, mechanical properties of special.
Online since: February 2016
Authors: Jun Du, Cheng Tang, Bo Jia, De Zhang, Qiang Miao
But in high soil resistivity regions, these measures are limited by the factors of economy, space or applying effect [1].
The preparation process seriously affects the properties of conductive concrete.
Regarding to the application on grounding network, the resistivity, compressive strength and flexural strength are three critical properties of conductive concrete.
Stainless steel fiber content, graphite content, silica fume content, dispersant content and water-cement ratio are the five key factors to influence the above three critical properties.
Mechanical Strength.
Online since: June 2015
Authors: K. Umanath, S. Aravindh
Several authors have reportable the chemical composition, properties of natural fibres and their composites by incorporating the fibre altogether totally different in many in various matrices before and once treatment by different methods.
Properties of JFRP materials Properties value Tensile strength 41.30Mpa Flexural strength 72.94Mpa Shear strength 50 Mpa Impact strength 49.65J/m Impact energy 0.14J Fig.1 Compression moulding machine Machining set up.
A L9 orthogonal array is selected for the present investigation .the factors and their respective levels are shown in Table 2.
"Effects of plasma treatment on mechanical properties of rubber/cellulose fibre composites."
"Mechanical behaviour of bamboo and bamboo composite."
Online since: December 2012
Authors: Reza Shoja Razavi, Morteza Hajizadeh Oghaz, Mohammad Reza Loghman-Estark, Reza Ghasemi
According to the experimental results and ANOVA, the pH of solution and calcinations temperature are the most significant factors influencing the morphology and particle size of YSZ nanopowder; pH of solution is the most significant factor influencing the morphology; and calcinations temperature is the most significant factor affecting the particle size.
In fact, its mechanical properties, in particular strength and hardness, united with fine optical, ionic and electrical characteristics make this material appropriate for many uses such as coatings [1].
The properties of the YSZ powders depend on numerous factors.
Three factors were checked at three levels and one at two levels.
Factors and the levels used for synthesis of YSZ powders.
Online since: March 2007
Authors: Klaus Friedrich, Vassilis Kostopoulos, S. Tsantzalis, P. Karapappas, A. Vavouliotis, P. Tsotra, N. Fanis
Introduction Carbon nanofibers (CNFs) are one of the most promising mechanical reinforcing materials for polymeric composites due to their high axial Young's modulus, high aspect ratio, large surface area and excellent thermal and electrical properties [1].
The higher PZT concentrations led to decrease in tanδ, probably due to the stiff nature of the ceramic particles, and therefore based on the DMTA the concentration of 4% PZT is the optimal one for enhancing the damping properties of EP without affecting the network quality.
Therefore, the expectation of enhanced damping properties by the combination of the two fillers was not verified by this analysis.
However, additional experiments are at the moment under process in order to study the damping properties by means of free vibration analysis.
The presence of CNFs decreased the damping properties of the EP system, which were not enhanced by the addition of the PZT particles.
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