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Online since: November 2013
Authors: Fa Si Wu, Ai Hong Ji, Wan Fu Wang, Hu Yuan Feng
Inhabitation and locomotion of animals are major factors that lead to biodegradation and biodeterioration at the cultural heritage sites.
Introduction Cultural relics and architecture monuments, especially those in the list of the world cultural heritage sites, are regarded as one of the common properties for all human beings.
Passage of time (inherent susceptibility; change of taste, function, and architecture), disasters (earthquake, fire, flood, war), climatic changes (temperature, humidity, rain or other precipitation, and sun exposure), human aggression (iconoclasm, vandalism, theft, tourism), and biological activity (growth and metablism of organisms) are token as primary factors that cause irreversible damage to the work of art [2,3].
Up to now, few study was aimed to analyze stress and load carrying capability of cultural properties when animals live on it, the relationship between animal's locomotion and cultural relics preservation is still undefined.
The motion properties of geckos have been well studied [14,15].
Online since: November 2016
Authors: Hamed Benghuzzi, Michelle Tucci
Pervious contributions revealed that there were several instrumental factors that affect the release profiles from within the ceramic reservoirs or matrices.
This observation alarmed us to test the mechanical properties of the retrieved capsules at the end of each phase.
Mechanical properties of all capsules were tested initially and after 24, 48 and 72 hour post exposure.
The TeCP capsules made from particle sizes of <38 showed slightly greater mechanical strength (three way bending/cold press) properties than the capsules made from 45 and 75 um.
After 72 hours, the capsules made from <38 um particle sizes had the highest mechanical strength properties.
Online since: October 2011
Authors: Ali Kafash Hoshiar, Hamed Raeisi Fard, Mohamad Mehdi Kheirikhah, Hafez Raeisi Fard
In modeling part of this paper, first atoms are simulated in 0(K) in geometric model and then we can choose our desirable atom and attribute the properties to our design.
Those deformations may affect on quality of the scan done by AFM.
Atomic CAD model of a cylinder The lattice constant for this structure can be given by eq. (2), in this structure atoms are not contacted to each other and the distance of each atom is related to structure factor.
This simulation can be also used to have better understanding about the equilibrium and physical and dynamical properties.
It can affect on the dislocation of the second atom until an equilibrium situation would be reached.
Online since: September 2006
Authors: B. Baretzky, Adrian Manescu, Alessandra Giuliani, Fabrizio Fiori
Achieving true Baroque sound requires overcoming significant materials science challenges, as it is known that the alloy composition and properties of the pipes strongly influences the organ sound [1].
In an extensive work [2], Plitnik determined the factors affecting the fundamental frequency f of the vibrating reed, showing that it is proportional to the reed thickness d and inverse length 1/L, as well as to the air pressure P, so that this dependence can be expressed by the empirical formula L dP kLPdf =),,( (1) where k is a dimensional constant (Hz atm -1), obtained experimentally.
Anyway, the large variations of k suggest that other factors should be considered, among which Plitnik himself proposed the curvature and the elastic properties of the brass reed.
Mechanical surface processing like grinding or filing are well known to have a deep impact on materials inducing further residual stresses.
Online since: March 2012
Authors: Xue Zheng Wang, Xiao Rui Song, Ying Zhang
Introduction With the continuous improvement of material strength on design, the demand of ductile iron is on the increase because the nodular cast iron has excellent mechanical property, and has been widely used in the machinery industry in recent years.
Phosphorus is also easy to segregation, sulfur is certain deplete more nodulizer, seriously affect the nodulizing of molten iron.
Reasonable spheroidization process can ensure the premise of mechanical properties of ductile iron and reduce the nodulizer dosage.
Selected Wuxi nodulizer H-I according to the performance requirements of cylinder casting and the actual production conditions, dosage is 1.2 to 1.4%, thrust forth Into underside of the ladle, at the same time in order to improve the mechanical properties of ductile iron and metallographic structure, using two breeds, adding 0.15% ferrosilicon powder particle size is 20 to 150 for the purpose of molten iron instantaneous birth in the casting process.
(5) Other fields, there will be many influencing factors when produce thick-walled ductile iron parts by the way of greensand manufacture, if you omit, will lead to casting scrap, therefore, the production plant should establish a strict process specifications and quality assurance measures.
Online since: July 2025
Authors: Crevan O'Donnell, Luke Geever, Anis Sofia Sufian
Physicochemical Properties of Extracted Chitin and Chitosan.
The CT yield of 17.60% aligns with documented yields ranging from 13% to 26.80% [45-47], which are influenced by factors such as extraction techniques and species variations.
This variability is affected by several factors, such as the species of crustacean, extraction methods and environmental conditions during processing phase.
A lower DA suggests fewer acetyl groups, which enhances solubility and mechanical properties, making chitosan suitable for diverse applications [61].
Barčauskaitė, ‘A Review of the Chemical Extraction of Chitosan from Shrimp Wastes and Prediction of Factors Affecting Chitosan Yield by Using an Artificial Neural Network’, Marine Drugs, vol. 20, no. 11, Art. no. 11, Nov. 2022, doi: 10.3390/md20110675
Online since: October 2008
Authors: Xian Yu Jin, Nan Guo Jin, Xiang Lin Gu
Experimental Study on Cracking Property of Self-Compacting Concrete Nanguo Jin1,a , Xianyu Jin1,b and Xianglin Gu2,c 1 Department of Civil Engineering, Zhejiang University,Hangzhou 310027,China 2 Department of Building Engineering,Tongji University, Shanghai 200092 ,China a jinng@zju.edu.cn, b xianyu@zju.edu.cn, c gxl@mail.tongji.edu.cn Keywords: self-compacting concrete, crack, characteristic age, ultimate flexural tensile strain Abstract: Taking free shrinkage as the key parameter in evaluating cracking of concrete, the cracking properties of self-compacting concrete with strength grade of C35 and C50 were investigated based on ring and slab restraint tests.
Actually, the cracking of concrete is the result of influence of multi-factors, including concrete mechanical properties such as elastic modulus, creep, tensile strength and calorific property like linear expansion coefficient.
So, all of the factors listed before, which will affect the cracking property of concrete, can be considered in the study to figure out the valuable results for the engineering application.
Ultimate tensile strain is a basic parameter in the study of concrete crack properties, and can be obtained by axial tensile test or flexural tensile test.
Comparing with common concrete, self-compacting concrete has better cracking property.
Online since: June 2011
Authors: Anayet Ullah Patwari, A.K.M. Nurul Amin, Mokhtar Suhaily
Other factors that donate for difficulty in machining this material are due to its high work-hardening tendency rates at machining strain rates which leads to high cutting forces, toughness, gumminess and strong tendency to weld to the tool and to form built up edge [4, 5].
The surface roughness of the work is considered as one of the most crucial factors for quality surface evaluation as it significantly can affect the work performance, durability and reliability [8].
In machining Inconel 718, the determination quality of its machined surface is generally contributed by various parameters such as cutting conditions, tool geometry and material properties [11].
Cutting conditions in coded factors and the surface roughness values obtained using TiN coated cemented carbide insert are presented in Table 3.
Journal of Mechanical Industrial Engineering, Vol. 2, Number 4, pp. 209-214, December 2008 [10] M.
Online since: December 2006
Authors: Yu Quan Chen, Zhen Jia Li, Deng Hui Zhu, Zhen Bo Wang, Jin Xing Guo
According to the inputted information and other influencing factors, the system infers a series of desirable cutter models and outputs the relevant information such as cutter shank dimensions, cutter length and blade shape.
Considering the lack of constraints to the target function in the machining data optimization module and many influencing factors that differ from general turning, an initial selection is made before optimization of machining data.
finitialMAX ≥ f > finitialMIN (1) vc initialMAX ≥ vc > vc initialMIN (2) The optimization target is divided into three parts: maximum productivity, minimum cost, and the integration of the two factors.
The expert system uses VC++ software to infer and optimize cutters and blades by considering the main influencing factors such as machine tool, coolant, work dimension and machining precision, which can make up for the inadequate experience of workers.
Huang: Mechanical Computer Integrated Manufacturing System-CIMS, Vol.9 (2003), pp.37
Online since: February 2016
Authors: G.P. Doroshko, V.N. Ilyukhin, V.A. Mikheev
The main importance is attached to the mechanical (strength, elasticity, deformability, stiffness) and thermal (heat resistance, temperature resistance) properties.
Some number of metals have certain properties, which are almost reached its ceiling, and some cannot be made, in principle (e.g., elasticity and high viscosity, the proper heat resistance and heat resistance in an oxidizing atmosphere and under the influence of mechanical loading and temperature above one thousand degrees, etc.).
They suggest monitoring the properties of the material, heating mode, performing physical and mechanical and other types of analysis, they are carried out before or after heating.
Ambient temperature is a compelling factor in the impact, the internal temperature – the response.
In addition, the properties of the semi-finished product by external feedback of IDS-diagram method are controlled and the anticipated data on the product properties by an external feedback of IDS diagram method are formed.
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