Search Options

Sort by:

Sort search results by

Publication Type:

Publication Type filter

Open access:

Publication Date:

Periodicals:

Periodicals filter

Search results

Online since: November 2007
Authors: Jing Kang, Chang Jian Feng, Hong Ying Hu, Qiang Shao
Grinding process is a very complicated process with multiple related factors, severely nonlinear and coupled.
Grinding wheel wear, grinding temperature, vibration are main factors affecting job quality and machining efficiency.
Its response of force shows that the dynamic properties are good and the force will reach steady state in 1~2s when grinding depth changes suddenly.
Force response also shows good dynamic properties.
Li: China Mechanical Engineering, Vol.13 No.1, pp.1-4
Online since: April 2014
Authors: Yong Ming Zhao, Hong Xue Li, Xue Wei Wang
To accurately calculate the prestress of externally prestressed composite girder bridges, the six critical factors (the prestressing tendon withdrawal and anchor deformation, friction between prestressing tendon and deviator, prestressing tendon relaxation, concrete creep, concrete shrinkage and temperature changes) that cause the prestress loss of such type of the bridges are summarized and the corresponding simplified calculation methods are respectively derived on the basis of the existing researches.
The prestressing tendon’s ability has an important influence on the mechanical behavior of prestressed composite girder bridges, which is the key design parameters.
On the basis of existing research, this paper summarizes the key factors that lead to loss of prestress and derives the corresponding simplified calculation method for design reference.
During the design of prestressed concrete , due to factors affecting the construction , material properties , and environmental conditions, prestress in tendon will gradually decrease, the phenomenon is called prestress loss.
The temperature changes loss As the external tendon is outside the beam cross-section, due to the temperature difference between day and night, seasonal temperature and other environmental factors, the temperature in the use phase is higher than that of tension construction.
Online since: January 2026
Authors: Ikuo Shohji, Tatsuya Kobayashi, Ryota Nakagawa, Fumiya Funatomi, Kyohei Ohashi, Ryuki Sakai
As next-generation power modules increasingly demand enhanced reliability, understanding the factors that affect metal/resin adhesion has become crucial.
Ensuring the performance and reliability of power modules requires careful selection of materials and thorough understanding of interfacial properties.
As a result, epoxy resins are now required to demonstrate even greater thermal resistance, adhesion performance, and mechanical toughness.
In this context, identifying the factors that affect interfacial adhesion between metals and epoxy resins, as well as understanding how this adhesion degrades over time, has become an important research topic for achieving long-term reliability in advanced power modules.
Ferreira, Influence of fillers on epoxy resins properties: a review, Journal of Materials Science, 57 (2022) 15183-15212
Online since: November 2014
Authors: Mohd Zulkefli Selamat, Mohd Shakir Ahmad, Safaruddin Gazali Herawan, Musthafa Mohd Tahir, Mohd Ahadlin Mohd Daud
Since the bipolar plate is the key component in PEMFC, the component must operate with multifunction and have a balance of properties, essentially well in both electrical and mechanical properties.
One of the factors limiting fuel cell commercialization is the development of bipolar plates, which are one of PEMFC’s key components.
Electrical and Mechanical Properties Electrical Conductivity.
In order to satisfy the required properties for the application of bipolar plate, a large amount of filler content is requisite and the impact on mechanical properties is now presented.
As for mechanical properties, the result showed a balance result for each different material.
Online since: December 2010
Authors: Shi Ping Yin, Shi Lang Xu
The experiment results indicate that sticking sand on epoxy resin-impregnated textile and reduced cover thickness are helpful to improve the mechanical performance of the component; the textile with 10mm×10mm mesh size is superior than that with 20mm×20mm mesh size regardless of in the respect of enhancing the bearing capacity of the TRC or in the respect of controlling matrix cracking; the novel method of adding U-shape iron hook not only can improve the bonding performance between the textile and the concrete, but also can enhance the shearing capacity of the concrete..
The mechanical behavior of TRC members is intensively associated with the interface bond behavior between the fiber and the matrix, which is influenced by the property of matrix and the fabric geometrical characteristics which relate to the type of knitting, mesh size, the type of fiber and textile surface treatment methods.
(a) 20mm×20mm Textile (b) 10mm×10mm Textile (left: before impregnated, right: after impregnated by epoxy resin and covered with sand ) Fig.1 Geometry of hybrid textiles Table 1 Properties of hybrid fabric Reinforcement Tensile strength(MPa) Modulus of elasticity (GPa) Ultimate strain (%) Titer of single Roving(Tex) Density (g/cm3) T700S 4660 231 2.0 801 1.78 E-glass 3200 65 4.5 600 2.58 Fine grained concrete.
For the TRC, the fine grained concrete were specifically chosen, whose mix and properties were shown in Literature [8].
Fig.7 Comparison of specimens with or Fig.8 Failure photo of the specimen with no without U-shaped iron hook U-shaped iron hook Conclusions The structure form of the textile, the cover thickness to the textile and the bond between the textile and the concrete are the important factors in affecting the mechanical performance of the thin-walled TRC competent
Online since: October 2014
Authors: Xiao Yang Lu, Da Liang Zhang, Qiao Sha Wang, Bo Lu Shao, Jing Xin, Ran An, Xiu Zhi Liu, Feng Cheng Liu
Analysis results of eight kinds of conditions showed that the square pyramid partial double layer of Schwedler spherical reticulated shell has good mechanical performance.
Analysis the mechanical properties of spherical reticulated shell based on these parameters.Figure 3, figure 4 and table 1 are given respectively with the displacement and the stress nephogram of spherical reticulated shell and the maximum displacement value and the most unfavorable stress values.
At this time, grid number Kn, Nx were the important factors affect the maximal displacement and the most unfavorable stress of the structure.
But the decrease of the maximal displacement amplitude was much bigger than the increase of the most unfavorable stress amplitude that means the increase of square pyramid unit thickness has beneficial effects on the mechanical properties of spherical reticulated shell.
The thickness of square pyramid unit is one of the important factors affects the mechanical performance of structure, and provides theoretical reference for relevant engineering design.
Online since: February 2008
Authors: Arash Rezaei, Ali Shokuhfar, I. Foroutan
In this investigation, some experiments such as hardness, tensile, impact and fatigue tests have been used to study the mechanical properties of the samples surface alloyed by this method.
In other words, because of low diffusion depth of Li in Al, the surface properties increase intensively, while properties which are not associated with the surface characteristics of the base material (Al) are almost constant.
Influenced by initial surface cracks, the fatigue behavior is another mechanical propImpact Energy (J) erty of the material which is intensively affected by surface alloying which makes much more surface hardness.
Conclusions The following conclusions can be drawn from this investigation: 1- Tensile and impact tests prove that like this method, other methods of surface alloying, does not change the mechanical properties not associated with surface characteristics of the material.
For the diffusion time of 24 hours the number of cycles to failure is increased by the factor 4. 3- Surface hardness is another property of the sample which is increased when the diffusion time is increased.
Online since: March 2017
Authors: Gerardo Araya-Letelier, Pablo Fernado Parra, Federico C. Antico, Miguel Carrasco
This composite material is intended to reduce the environmental impacts by valuing waste materials in construction applications while improving mechanical properties.
Over the last decades different types of fibers have been incorporated in concrete and mortars to improve their mechanical properties.
Pig-hair microscopy Figure 6. 3D elevation of the central region of pig hair Physical and Mechanical Properties of Fiber-Reinforced Mortar.
Part of the reason why these properties might be affected resides in physical properties such as bulk density and porosity that can be affected when incorporating fibers in mortar.
Burdette, Hybrid effects of carbon fibers on mechanical properties of Portland cement mortar, Mater.
Online since: April 2017
Authors: Wei Sun, D. Graham McCartney, G.A. Jackson, Hao Chen
The microstructure of MCrAlY bond coats can be controlled through careful selection of the alloy composition which allows, in theory, careful control of the mechanical properties, however the mechanical properties of MCrAlY bond coats are also affected by the method of deposition [13].
Calculation of Stress, Strain and Mechanical Properties 3.1 Stress.
It can be established that the variability of HVOF thermal spraying does not significantly affect the creep properties of HVOF sprayed CoNiCrAlY coatings
Mechanical properties and microstructure of VPS and HVOF CoNiCrAlY coatings.
Sun, editors, 2nd International Conference SSTT Determination of Mechanical Properties of Materials by Small Punch and Other Miniature Testing Techniques, pages 47–63.
Online since: May 2007
Authors: Hyun Chul Shin, Beom Suk Kim, Yeong Seok Yoo, Jong Bo Kim, Hyung Suk So
Cooling rate might affect the quality of crystallization, but below 5℃/min had no difference.
For this aim, we identified the adequate operating condition for high-quality materials and studied the influence of the individual factors on the quality of slags and the quality improvement process.
Therefore, the crystallization process is proved to enhance the mechanical properties of slag.
According to the rise in the temperature for crystallization, the number of particles on precipitate tends to rise, which will tremendously contribute to the high-quality mechanical properties of slag due to structure solidification, particle strengthening, or cracking deflection. 2.
It would be economic to manufacture crystalline slag with more rapid cooling rate as possible in the suitable range for properties. 4.
Showing 5861 to 5870 of 26166 items