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Online since: June 2014
Authors: Lan Zhang, Lei Shi, Yan Rong, Hui Ping He
Introduction Properties of polymer products depend on the morphology distribution within the product, which itself depends on both the molecular properties of the polymer used and the processing conditions applied during fabrication.
Not only mechanical properties depend on crystal structure [1–3], but also properties, like dimensional stability [4] and transparency [5].
For semi-crystalline polymers, the thermo-mechanical history of affects their crystallization kinetics during their processing.
Study of flow-induced crystallization in polymers has drawn much interest in recent years, because it implies the possibility of controlling and predicting the final morphologies and properties of semi-crystalline polymers in current transformation processes.
At low shear rate, the thermal effect is always predominant, but with the shear rate increasing, the flow affects strongly the crystallinity, and the shear process governs the crystallization.
Online since: February 2012
Authors: Kari Mäntyjärvi, Kari Kutuniva, Jussi A. Karjalainen
Extremely high strength of the ultra-high-strength steels leads to increased load factors on the sheet metal machinery and punching tools.
This experimental study examines how much the convex punch geometry affects on cutting forces when punching ultra-high-strength steels.
The extremely high strength of the processed material leads to increased load factors on the sheet metal machinery and punching tools.
Mechanical properties of steel are listed in Table 1.
Mechanical properties of DQ960 [6].
Online since: February 2011
Authors: Lai Wang, Jie Zhao, Ji Bin Pei, Yun Feng Zhao, Dong Ming Li
Creep rupture data generally exhibits certain dispersity because of uncertainty factors in materials and experiment conditions.
Most design methods of rupture property are deterministic.
Reliability is used in electronic and mechanical domains.
Statistic Analysis of Creep Rupture Data based on Z-parameter As the rupture property is mainly the association of temperature, stress and rupture time, many parametric methods take some of these three factors into account and put the data in a band.
The safety is affected by dispersion degree of creep rupture data obviously.
Online since: February 2022
Authors: Abdulrahman Mohammed Mezaal, Khalid Battal Najim, Ahmed Tareq Noaman
Discarded bead wires’ properties.
Results and Discussion Rheological Properties.
Obviously, it can be observed that he addition of DBW into SCC affected the rheological properties adversely.
Hardened Properties.
Hajibandeh, Experimental investigation on effects of hybrid fibers on rheological, mechanical, and durability properties of high-strength SCC, Const. and Build.
Online since: September 2014
Authors: Yi Du Zhang, Yan Zhong Wang, Chun Cheng Zang
Introduction Owing to high hardness, outstanding wear resistance, excellent intermetallic friction resistance and corrosion resistance properties, nickel-base self-fluxing alloy powder has been widely applied to laser cladding process to strengthen the surface of many kinds of products.
Ji et al. [1] analyzed the reaction mechanism between metallic powder particle and laser and discussed the main influencing factors on quality of cladding parts and then presented effective ways to improve the quality of cladding parts.
Qiu et al. [4] researched the microstructure and properties of cladding coating by means of micro-analysis and mechanical property testing.
The substrate material is 45 steel which is a kind of improved carbon structural steel. 45 steel has excellent comprehensive mechanical properties after hardening and tempering treatment.
But the layer power could affect layer width to a large extent.
Online since: January 2015
Authors: Xue Song Yang, Zi Yan Yun, Hong Bo Wang, Guan Hong Xu, Yan Ling Zhao
Rolling temperature directly affects the mechanical properties, microstructure, and energy consumption [3].
The property of rolled piece selected Al-Si alloy in material storage.
The material property of roller is defined as a rigid body.
The damage factors were greater than 0.45 under other temperatures and edge defects occur. 3.2 Experimental verification 3.2.1 Description of the experimental conditions and test procedures.
Considering all these factors, processing technology is better in the initial temperature of 350 ℃{TTP}8451 .
Online since: October 2010
Authors: Cui Yu Li, Xiao Tao Zhang
Material Properties.
Material properties of three-dimensional woven fabric are shown in the table 1.
For example, the normal stress of x direction is regarded as uniform pressure load to affect the external surface of the x-axis positive direction, shearing stress is regarded as in-plane load to affect the external surface of the x-axis positive direction and other component of stress is made similar treatment.
Properties of tensile strength of 3D carbon fiber fabric reinforced epoxy resin composites are studied.
These factors will influence the final test results.
Online since: April 2012
Authors: Ahmad Kamal Ariffin, S. Abdullah, Mohd Zaki Nuawi, M. B. Ali
Vehicle wheels have to be considered as a safety-related component and the essential factors in wheel applications are the fatigue strength and the impact strength [8].
Aluminium alloy 6061-T6 has superior mechanical properties such as a high strength/weight ratio, corrosion resistant, high thermal conductivity and excellent weld ability and deformability.
The properties of the specimens and the striker are tabulated in Table 1, for which the values were obtained from the actual laboratory tensile test performed by the author [12,13].
Table 1 Material properties for striker, Charpy specimen 1 and Charpy specimen 2 Comp.
J. of Mechanical and Material Engineering 6 (2011) 92-101
Online since: November 2025
Authors: Philemon Abuti Arito, Nokuphila Temfundo Dlamini
Information pertaining to the geometry of the bridge and the mechanical properties of the materials used for construction were obtained from “as-built” engineering drawings from the Roads Authority (RA) of Namibia, physical measurements and non-destructive testing in situ.
Bridge failures predominantly result from excessive loads, ageing, exposure to aggressive environments, construction defects and other factors [5 - 7].
The physical and mechanical properties of concrete, steel and structural elements of bridge B0140 were obtained from “as-built” engineering drawings and unpublished technical reports from the Roads Authority (RA) and validated by physical measurements and non-destructive testing in situ.
A summary of the geometric and material properties of bridge B0140 is presented in Table 1.
Bridge Geometric and Material Properties Geometric properties Bridge length [m] 61.7 Bridge width [m] 24.0 Bridge height [m] 1.8 Bridge deck thickness [mm] 250.0 Pier thickness (minor support) [mm] 260.0 Pier thickness (major support) [mm] 580.0 Pedestrian sidewalk [m] 1.2 Material Properties Compressive strength of concrete [MPa] 40 Cover [mm] 40 Yield stress of steel [MPa] 460 Loads.
Online since: December 2006
Authors: Zhen Hai Long, Xi Bin Wang, Wen Xiang Zhao
It is well known that the mechanical property of these surface and subsurface layers could greatly affect the working performance of work-pieces.
For instance, the change of surface hardness has been proved to be a determining factor for the rolling contact fatigue life of bearing manufactured by grinding [3].
In order to study the effect of cutting parameter, depth of cut, feed per tooth, cutting velocity, and the interactions among them on surface integrity, tree-factor factorial design was used.
The factors and levels are shown in Table 1.
These results were in agreement with the clearly noticeable heat affected layer produced under experiment condition.
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