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Online since: February 2012
Authors: V.S. Jayashri, Gloria Chua, S.E. Valavan
A thin film sensor, due to its piezoelectric properties, upon hitting the object, the direct mechanical stress on the film would cause the film to polarize and generate voltage.
The hysteresis loop was then used to determine ferroelectric parameters Pmax, Pr and Vc; Atomic Force Microscopy (AFM) was used to determine the factors affecting the ferroelectric properties of samples. 3.
Piezoelectric properties are difficult to be measured directly, but are estimated based on the measured ferroelectric properties.
A high polarization in ferroelectric analysis suggests a higher voltage generated due to piezoelectric properties with the application of mechanical stress.
After factoring in the relative significance of the two important factors needed for a tactile sensor application, we conclude that the PSZT-PZT films perform better than PZT-PSZT films.
Online since: January 2016
Authors: Hasan Zuhudi Abdullah, Maizlinda Izwana Idris, Mohamad Ali Selimin
From the results, the UV light treatment affects the wettability properties of the anodised titanium without changing its microstructure and surface morphology.
This is due to the excellent mechanical properties of titanium such as high corrosion resistance, good mechanical properties, lightweight, and biocompatibility [2].
There are various factors that can affect the changes on phase formation of the titanium oxide such as type and concentration of electrolyte, applied voltage, current density, temperature, agitation speed, and surface area ratio [14-16].
So, the UV treatment is not contributing on the factors that can affect the phase changes on the titanium oxide as the UV light only affect the OH group of the specimen [8-10].
The Fig.3 also shows that the UV-A wave type produced more hydrophilic properties than UV-C.
Online since: May 2014
Authors: Eric Hug, Jerôme Chottin, Mayerling Martinez
A strong degradation of the mechanical properties is observed for temperatures higher than 275 °C.
The carbide precipitation in martensite can have a detrimental effect in mechanical properties when the material is tested at room temperature, but if carbides stay small enough no consequences in mechanical properties at room temperature would be observed.
Rachik, Influence of stress state on mechanical properties of dual phase steel sheets.
Ekrami, High temperature mechanical properties of dual phase steels, Mater.
Vahdani, Room-temperature mechanical properties of dual-phase steels deformed at high temperatures, Mater.
Online since: December 2022
Authors: Jérôme Chevalier, Helen Reveron, Imane Touaiher, Malika Saadaoui, Pascal Reynaud
Porous scaffolds for bone regeneration should satisfy a combination of requirements properties [10, 11]: biocompatibility, biodegradability, osteoconductivity and mechanical properties.
Mechanical Characteristics The studied scaffold exhibits good mechanical properties.
This study pave the way for future work to identify the damage mechanism and factors controlling the fracture in this scaffold to achieve better mechanical and biological performance.
Guiberteau, Mechanical properties of calcium phosphate scaffolds fabricated by robocasting, J.
Van Eijden, Mechanical properties of cancellous bone in the human mandibular condyle are anisotropic, J.
Online since: February 2017
Authors: Balázs Verő, Péter János Szabó, Mihály Réger, Peter Trampus, Enikő Réka Fábián, Zsolt Kerner, Magda Lakatos-Varsányi, Judit Telegdi, László Péter
Overview of the investigations Samples were taken out from the leaking pipeline system, and following characteristics were determined: · long term corrosion potential, corrosion rate, electrochemical impedance, pitting potential (provoked by chloride ions and ferric chloride), · bulk and local chemical composition (EDX, LA-ICP-MS), deposit composition, · mechanical properties, · microstructures (OM, SEM, EBSD), · microbiological effect (fluorescence microscopy).
Results of the chemical composition and mechanical properties determination The chemical composition values, the mechanical properties determined by tensile tests, the features of non-metallic inclusions (content and composition), the phases simulated by JMatPro as well as by Calphad with special regard to δ-ferrite content were all in compliance with the standard values.
Results of the microstructure investigations The microstructure investigations were focused on the influencing factors of pitting corrosion on austenitic stainless steels.
The complexity of the problem is demonstrated by the fact that some welds with heat tint did not show damage which suggests that not only the presence of an oxide layer, but other most likely operating factors (stagnation of medium) are necessary for initiating corrosion.
Description of the precise degradation mechanism requires knowledge and consideration of all influencing factors and their relationship.
Online since: August 2024
Authors: Abolghassem Zabihollah, Stephen Bardowell, Rajesh Vuddandam, Bryan Does
The infill density plays a significant role in the printing time and mechanical properties of the printed objects.
They determined the optimal process parameters to achieve the desired mechanical properties of PLA structures.
[16] determined the mechanical properties of porous PLA scaffold for simulating bone properties.
Effect on infill density on mechanical properties of petg part fabricated by fused deposition modelling.
Mechanical properties optimization for pla, abs and nylon + cf manufactured by 3d fdm printing.
Online since: April 2014
Authors: Xiang Ping Fu, Xiao Xue Liu, Yi Ze Sun, Pei Huang, Yu Chen Li, Ravindra Shah
The major influence of freeze-thaw damage is the mechanical properties of concrete including compressive, tensile and shear strength, elastic modulus and Poisson's ratio, etc.
There are two factors affecting the durability of concrete: from external view, are freezing speed and temperature, freeze-thaw cycles; from the internal perspective, are air-content of concrete, water-cement ratio, cement type and varieties of raw materials.
Guizhen Duan [3] summarizes the change rules of mechanical properties of the concrete after freeze-thaw damage, and analyses the main factors affecting the durability of concrete.
Conclusions According to the test results, the following conclusions can be obtained: (1) Mechanical properties including compressive strength, elastic modulus of concrete have significantly impact with the increase in the number of freeze-thaw cycles
The influence of freeze-thaw cycles on the mechanical properties of concrete [J] Journal of Civil Engineering, 1997, 30 (4): 35-42.
Online since: October 2010
Authors: Fan Li, Ling Wang, Xue Yong Wang, Ming Jie Zhou
The bonding properties of post-installed bar in concrete are fundamental to evaluate the results of reinforced concrete.
Several investigations carried on the research on the influencing factors of post-installed bars bonding properties.
In this paper, in order to analysis some important factors to bonding properties of post-installed bar used structure adhesive anchorage in concrete distinctly, we carried on the post-installed bars structure adhesive anchorage performance test and researched the drawing failure mode of specimen of post-installed bar.
Test Method Based on ‘Plain concrete mechanical properties testing method’ (GB/T 50081-2002), pull-out test carried on 30t electrohydraulic servo universal tester made by SANS company and self-made loading reaction frame.
Factors affecting post-installed bar anchorage bonding strength In figure 1 it was given that the results of the ultimate pull-out force and ultimate shear stress variation tendency with concrete tensile strength.
Online since: March 2015
Authors: Yin Yin Liu, Man Chen Xiong, Quan Li
The surface roughness , surface residual stress and work hardening constitute the three major factors affecting the quality of the workpiece surface [1].The surface roughness as an important factor in precision machinery manufacturing has aroused widespread concern [2].
Surface roughness largely determine the performance of various aspects of the use of parts, such as the contact stiffness, abrasion, corrosion, and fatigue properties.So study the formation mechanism of surface roughness, and establish the mechanical model of roughness has a certain practical significance.
The surface roughness equation, (7) This roughness mechanical model indicates that the surface roughness is influenced by the nose radius, cutting edge radius, elastic modulus, cutting force, flow stress,and material hardness.The mechanical model of the surface roughness is covering most of factors,so for the prediction of surface roughness has a higher accuracy.
The mechanical model does not take into account the factors - tool wear, flutter and other aspects.In the future research ,we need to establish a more perfect mechanical model.
Beijing: Mechanical Industry Press.1982, 10
Online since: June 2014
Authors: Ning Ning Wang, Bang Sheng Xing, Le Xu
Study on Nonlinear Damping Properties of Hydro-Pneumatic Suspension System for XP302-Pneumatic Tyred Roller Bangsheng Xinga, Ningning Wangb and Le Xuc School of Mechanical and Electrical Engineering, Jiangsu Normal University, Xuzhou 221116, China axbs138@jsnu.edu.cn, bning597524116@126.com, c1183116563@qq.com Keywods: Hydro-pneumatic Suspension, Stiffness property, Damping property Abstract.
As it has typical nonlinear characteristics and good damping properties compared with conventional suspension, and has broad prospects for development, therefore, making further study of nonlinear properties of the hydro-pneumatic suspension is very important.
Damping property affects the vehicle's ride directly.
The main factors affecting the hydro-pneumatic suspension stiffness property are cylinder inner diameter, diameter and length of tubing which connected to hydro-pneumatic suspension and accumulator.
These factors provide hydro-pneumatic suspension System designing with basis selected parameters.
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