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Online since: September 2014
Authors: Cristina Gentilini, Elisa Franzoni, Gabriela Graziani, Simone Bandini
Rising damp is one of the main issues affecting masonry buildings.
Besides these negative effects, the presence of water in the pores may influence the mechanical properties of building materials.
In the case of masonry structures, the presence of rising damp and salts may cause the deviation of the mechanical properties from the expected ‘ideal’ behaviour [6].
Results and discussion Mechanical and microstructural properties of brick and mortar are reported in Table 1.
Mechanical and microstructural properties of the materials used for manufacturing the triplets.
Online since: March 2007
Authors: José Luis Ocaña, C. Molpeceres, J.A. Porro, A. García-Beltrán, Miguel Morales Furió
Laser Shock Processing as a Method for the Improvement of Metallic Materials Surface Properties: A Discussion on the Influence of Combined Mechanical and Thermal Effects J.L.
Fax: (+34) 913363000. email: jlocana@etsii.upm.es Keywords: Laser shock processing, residual stresses, mechanical effects, thermal effects, surface properties, fatigue, wear, numerical simulation.
Abstract Laser shock processing (LSP) has been presented as an effective technology for improving surface mechanical and corrosion properties of metals, and is being developed as a practical process amenable to production engineering.
Experimental results Under the referred experimental conditions, the effects induced by the laser on the mechanical properties of the treated material have been characterized.
[9] Ocaña, J.L. et al.: "Laser Shock Processing as a Method for Surface Properties Modification of Metallic Materials".
Online since: March 2010
Authors: Jian Feng Li, Jie Sun, Feng Jiang, Ge Song, Tao Mu, Rong Hua Yuan
The direct influence of residual stresses on the functional behavior (the static and dynamic strength, chemical and electrical properties, fatigue, rust, etc.) of the component was relatively well known [3].
Experiment Set-up Material Properties, Cutting Tool and Equipment.
The curves of range analysis of the milling factors are shown in Fig.2
According to the discussion above, the cutting speed is the most significant factor affecting the residual stress.
l Cutting speed is the most significantly factor affecting residual stresses.
Online since: October 2013
Authors: Zhi Yuan Rui, Rui Cheng Feng, Tao Chen, Yong Li, Bao Zeng Wang
Establish dynamic equation of the upsetting system by its Lagrange equation; analyze the key factors affecting the system’s dynamic characteristics; build the system’s finite element model to be real by ANSYS Workbench; Set key parameters for the two sets of plans and do analysis for the modal and harmonic response successively.
Study the two parameters affecting the system's dynamic properties; set the distance range between the sliders alone; set the original system guide rails distance L1=560mm and the modified distance L1=540mm.
According to the upsetting system’s dynamic model, damping is one of the key factors to decide the amplitude size of the friction welder’s forced vibration or free vibration.
In real welding, the effect on the friction welder’s dynamic properties can be great though small damping force.
Conclusion Build dynamics equation of upsetting system by Lagrange equation to get the key factors affecting the dynamic characteristic parameters and the new model is obtained by adjusting the guide space.
Online since: January 2010
Authors: Sybrand van der Zwaag, D.D. Risanti, M. Yin, Jiang Hua Chen
The Mechanical Properties of AA2024 as Function of the Interrupted Ageing Conditions D.
For most cases, the effect of interrupted ageing could not produce a simultaneous improvement in mechanical properties.
Introduction A high strength, a good fracture toughness and excellent fatigue properties are prime requirements for precipitation-hardened aluminium alloys for aircraft applications.
In contrast to strength, factors affecting fracture toughness are complex, as reviewed in [9].
The objective of the current study is to study comprehensively the influence of each ageing stage on the mechanical properties, i.e. strength and toughness of AA2024.
Online since: December 2010
Authors: Henrik Svensson, Torsten Sjögren
The purpose of the experiments was to study the effect of the matrix structure on the overall mechanical properties.
An emphasis is put on the pearlite interlamellar spacing because this controls the resulting mechanical properties to a large extent.
These were done separately to get an indication of how differences in the casting process might affect the determined properties.
The mechanical properties were determined from standard tensile tests according to SS-EN 10 002-1 [8].
Rantala: The effects of alloying and thermal factors on the solidification and mechanical properties of gray iron, (Technical Research Centre of Finland, Espoo 1989)
Online since: April 2012
Authors: Bin Jiang, Zhe Li, Ming Jia Zhou, Hong Xu Xu
The 1Cr18Ni9Ti Materials Performance Mechanical properties.
Mechanical properties is known as the performance of materials under the action of force.
Mechanical properties are some important indicators of the actual design, processing, and also the impact of the finite element simulation accuracy of the key factors.
These factors accelerated the spread of the tool wear.
On the basis of physical properties and mechanical property of 1Cr18Ni9Ti, we took into the relationship of the coefficient of linear expansion and the coefficient of heat conductivity with temperature changes, and simulated the cutting process.
Online since: April 2012
Authors: Li Qiao, Song Ji, Hong Yan Guo, Suo Kui Tan, Xiao Ping Song, Hong Zhao
By means of mechanical properties test and microstructure observation,the relationship between mechanical properties ,microstructure graph of core-shell Ni/TiO2 group particles concentration of EMR and different electric field, magnetic field or electric- magnetic field have been researched.
It is found that with increasing of particles concentration, the properties are increased.
There are many factors affect the properties of Ni/TiO2 group EMR fluid [4.5], particles concentration is one of most important factors [6.7].
The properties and microstructure under electric field, magnetic fields or electromagnetic fields are direct affected by particles concentration.
This is due to the nanometer core-shell particles into the fine chain in low concentration, chain interference each other are low, mechanical properties of EMR are low.
Online since: April 2021
Authors: Alokesh Pramanik, Sujan Debnath, Abdul Hamid, Dominick Wong, Izman Sudin, Mahmood Anwar
Numerous literatures have suggested that the presence of void negatively affect its mechanical properties and effective degassing process is one the solutions for such issue.
Reinforcing materials are a form of fillers, they are added into the matrix of the parent material to enhance its mechanical properties.
While it is believed that mechanical air entrapment is the main cause of void formations, other factors such as geometry, mold complexity, resin properties and flow rate can affect its size and location.
For every 1 % of void content found in the composite, its mechanical properties can be reduced by up to 20 % [17].
Gu, Factors affecting thermal conductivities of the polymers and polymer composites: A review Composites Science and Technology 193, 108134 (2020)
Online since: March 2011
Authors: Nai Chao Chen, Ping He, Tian Yu Chen, Yu Jie Shen
The experimental conclusions show that thermal shock plays a more significant role on affecting the fracture properties, compared with the factor of temperature.
Introduction Investigations on the mechanical properties of engineering materials at the high temperature have been attracted extensively interests, which is also an important factor of evaluating the safety ratio of materials, especially with respect to fracture behavior, in the utility industrial field.
Therein, the overheating in the heating surface is liable to cause the serious decrease of strength and mechanical properties compared with the initial desired criterion, which is regarded as one of the major factors to influence the safe operation of the boiler.
Therefore, the deeply comprehensive studies on mechanical characteristic after short period high temperature and thermal shock are known to be effective approach to enhance the properties of materials with respect to the safe application.
For the temperature of 550ºC, there has a large change of fracture properties for the standard sample.
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