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Online since: June 2019
Authors: Khalil Ibrahim Abass
The material formability is affected by mechanical properties and characteristics of the product profile.
In addition, the important factors that lead to failure of the completed products have been studied and debated. 2D Simulation Models The simulation models take into account the material property, elastic-plastic of the blank behavior and the crossing points contact effect of the forming tool, the grip tool and the blank.
Aluminum alloy_1050 was used, where the mechanical properties that resulted from the tensile test are represented in Table 1.
It is important to predict the results with the factors to reduce the wide number of tests and applying the time-cost criteria.
Carsley, Forming of AA5182-O and AA5754-O at elevated temperatures using coupled thermo-mechanical finite element models, Int.
Online since: September 2016
Authors: P. Sangaravadivel, N. Natarajan, V. Krishnaraj
It was found that percentage of solid lubricant and load are the most significant factors influencing the friction and wear properties of composites.
In recent years, metal matrix composites (MMCs) have emerged as promising material with combined properties of monolithic matrix and reinforcements.
More inclined non parallel lines in the interaction plots corresponding to load and % of reinforcement implies that are the predominantly influencing factors affecting the responses compared to sliding velocity and sliding distance.
References [1] Resources: Standards & Properties - Copper & Copper Alloy, Copper Development Association Publication. 198, No. 83, pp. 1-22
[25] T Rajmohan, K Palanikumar, S Ranganathan, Evaluation of mechanical and wear properties of hybrid aluminium matrix composites, Transaction of Non ferrous metals Society of China, 2013, Vol 23, pp 2509-2517.
Online since: August 2007
Authors: Woo Sik Kim, Young Pyo Kim, Kwang Seon Shin, Cheol Man Kim
A clear understanding of fatigue properties for the pipeline steel and its weld is important to provide information for pipeline design during pipeline construction and predict pipeline fatigue life during pipeline operation.
Tensile properties of pipeline steel and weld metal in girth weld are listed in Table 1.
Tensile properties of X65 pipeline steel and its weld.
Welded structures show a gradient of microstructure and mechanical properties from the weld metal to the unaffected base metal.
Significant researches regarding the microstructural change and the mechanical properties of X65 pipelines have been performed [7].
Online since: November 2017
Authors: Teng Hui Chen
Chen et al. [6, 7] discussed the critical stress intensity factor in modes I and II fracture resulted from specimen propagation with various V angles and processing methods and found the critical stress intensity factor in mode I fracture being affected by the depth of the same V angle that could be the failure criteria.
As the structure with the wedge angle under mechanical or thermal loading, the stress at the apex of the wedge structure can appear the infinity.
Table 2 shows the material properties for PMMA and CFRP.
Yang, Stresses near the edge of bonded dissimilar materials described by two stress intensity factors, Int.
Munz, Stress singularities in a dissimilar materials joint with edge tractions under mechanical and thermal loadings, Int.
Online since: May 2014
Authors: Aaron F. Cipriano, Christopher Miller, Hui Nan Liu
Magnesium (Mg)-based alloys have attracted great interest as metallic biomaterials for orthopedic applications due to their biocompatibility, biodegradability, and mechanical properties that resemble those of cortical bone.
Both Zn and Ca play critical roles in bone formation and growth, and have been shown to increase mechanical and corrosion properties of Mg alloys.
Previous in vitro and in vivo studies showed that Mg-based alloys improved mechanical and degradation properties for biomedical applications as compared with pure Mg [5-7].
The cause for surface nanoscale porosity in Mg alloys has been attributed to factors including solidification shrinkage, grain size, cooling rate and gas dissolution [15].
Ma, et al., Influence of rapid solidification on the mechanical properties of Mg-Zn-Ce-Ag magnesium alloy, Mater.
Online since: December 2018
Authors: Stefano Grimozzi, Claudia Rocchi, Giuseppe Napoli, Andrea Di Schino
The mechanical properties of steels are strictly connected to chemical composition as well as to microstructural features obtained after thermo-mechanical processing.
As a consequence, recrystallization and grain growth are relevant to the mechanical properties of steels, thus suggesting the necessity of mathematical models able to predict the microstructural evolution after thermo-mechanical cycles.
In particular, in stainless steel grades, mechanical characteristics, and a proper microstructure with an adequate grain size distribution, are very important in order to achieve the required formability and deep drawing properties for many applications.
In order to achieve such ability, not only mechanical properties but also an adequate microstructure of the product is needed.
This is the reason why there is the need for quantitative models that accurately predict the effect of the processing parameters on the final product in order to control the microstructure and properties of steels during a thermo-mechanical treatment.
Online since: October 2013
Authors: Xi Bing Li, Dong Sheng Li, Yun Shi Ma, Jian Jia Wang, Xun Wang, Ming Zhu Li
The main factor that influences the processing efficiency of CNC vertical lathe is hydrostatic thrust bearing speed.
Then the hydrostatic thrust bearing temperature field distribution and lubricating properties were obtained with the use of computational fluid dynamics (CFD) theory and the finite volume method combined with the segregated solver of FLUENT.
In this paper, on the basis of the above research, the influence factors of bearing thermal stability and thermal deformation were analyzed and the internal flow law of hydrostatic bearing was revealed with knowledge of fluid dynamics and tribology.
Factors of lubrication performance but for large scale constant flow oil pad open static bearing wheel bearing lubrication mechanism is quite complex, so the study on large scale constant flow oil pad open hydrostatic bearings must first from the mechanical properties and the oil film state analysis.
In this paper the quantitative oil supply by engineering the oil return groove circular guide hydrostatic thrust bearing as the research object, research the fan-shaped cavity flow, oil film, bearing capacity, stiffness, friction force and friction power and other mechanical properties.
Online since: February 2012
Authors: Zhong Ning Guo, Xian Feng Zhang, Jia Qing Wu, Bing Hua Mo
The model employs a coupled thermal–electrical–mechanical analysis and accounts for temperature-dependent thermophysical properties of materials, contact resistance and the Peltier effect.
The RMW is a transient thermal process associated with both material nonlinearity from temperature dependent physical properties of workpieces and the geometrical nonlinearity from contacts at the electrode contact surface and the faying surface.
However, it is unpractical to consider all factors in the modeling.
Material Properties Data.
The simulation results are verified by comparing the calculation result and the heat-affected zone of joint cross section through metallographic observation, as shown in Fig. 4.
Online since: November 2014
Authors: Mohamad Awang, Ramli Mat, Asmadi Ali, Rosli Mohd Yunus, Anwar Johari
Rheological factor such as shear rate during membrane fabrication process has an effect on properties, structures and performance of membranes.
During those years, the effect of rheological factors such as shear rate on membrane development attracted less attention in membrane research study.
Rheological factor such as shear rate would affect morphology, physical properties and separation performance of an asymmetric membrane.
Employing different shear rates has affected the surface layer and sub-layer structure of the membranes and subsequently affected its properties and separation performance.
Gu, Effect of shear rate within spinneret on morphology, separation performance and mechanical properties of ultrafiltration polyethersulfone hollow fiber membranes, Chemical Engineering Science. 55 (2000) 1077-1091
Online since: April 2014
Authors: S.M. Sapuan, E.S. Zainudin, A.A. Nuraini, M.R. Mansor, Arep Ariff
In this paper, the stiffness mechanical property of natural fiber reinforced thermoplastic composites is analyzed using composite micromechanical model.
Research Methodology In general, there are various micromechanical models developed to predict the mechanical properties of single fiber/matrix polymer composites system.
Table 2 shows the materials properties of the kenaf bast fiber and thermoplastic matrices.
The Halpin-Tsai equation was applied to analyse the elastic properties for all fiber loading conditions.
These results also highlight a great anisotropy of vegetal fibres between transverse and longitudinal properties [13].
Showing 7881 to 7890 of 26166 items