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Online since: October 2013
Authors: Xi Hua Chu, Long Chen, Yuan Jie Xu
The results obtain by numerical simulation agree with the observed data, the deformation process can be satisfactorily modeled.
What's more the stability under the most unfavorable conditions was calculated with the strength reduction method.
Online since: September 2025
Authors: Sigo Scharnholz, Ralf Hassdorf, Kamil Kotra, Milan Zuvic, Klaus Hoffmann
Concerning breakdown voltage, the real devices data agree to simulations for junction termination extension thickness in the relevant region.
As the dotted lines in Fig. 6 show, this reduction further increases the voltage drop in the case of the 100-µm drift layer.
Even though a further reduction of te would increase the total voltage drop, it further increases the threshold voltage as well, and therefore does not result in a better match to the measurement curve.
Online since: November 2011
Authors: Omed Ghareb Abdullah, Sarkawt Abubakr Hussen
The refractive index as a function of wavelength can be determined from the reflection coefficient data R and the extinction coefficient K using equation: n=4R1-R2-k212-R+1R-1 (2) The absorption edge for direct and indirect transitions can be obtained in view of the models proposed by Tauc et al [7]: αhv=Co(hv-Egopt)m (3) where Co is a constant related to the properties of the valance and conduction bands [8], hv is the photon energy, α is the absorption coefficient, Egopt is the optical energy band gap of the material, and m=1/2, 3/2, 2,or 3 for direct allowed, direct forbidden, indirect allowed and indirect forbidden transitions respectively [9].
The reduction of the band gap of these films after thermal treatment, and shifting the absorption properties of these organic molecules to lower energy often gives rise to stability problems to oxidation [13].
Furthermore, the calculated values of the optical parameters illustrated that there was a reduction trend of the optical band gap values by increasing the concentration of Aluminum Iodide, which suggests the presence of the deeps localized states in the band gaps.
Online since: February 2011
Authors: Md Akil Hazizan, Nurashikin Sawal
Localized impact damage can be induced from tool drops, runway debris, and hail storms which can cause a drastic strength reduction of the structure.
Even though the high potential of sandwich structures is well acknowledged [6-8], their ability to resists localized impact damage which could lead to reduction in its load-bearing properties has not yet been established.
Results and Discussion To investigate the effect of core thickness on the impact performance of sandwich structure, low-velocity impact tests has been carried out and average data was collected for each sample, which included maximum impact force, energy, and impact damage area.
Online since: March 2014
Authors: Pavol Hvizdoš, Ján Balko, José Manuel Córdoba, Ernesto Chicardi
It can be improved at the expense of either hardness, which increases with the increasing volume fraction of hard particles, a reduction in size of these grains and the distance between them.
The transition between the core and the edge can generate residual stresses that promote cracking and consequent reduction in toughness of materials [1].
In the first case, the individual points were selected manually to get data for individual phases contained in the microstructure (grains and binder).
Online since: December 2010
Authors: Ling Yun Zhou, Qing Zhang
The concerns of manufacturers begin to incline to circulation field from production field, and it was gradually realized that the tremendous reduction in logistics cost of space has become a new source of profits.
The mechanism of logistics activity cost control for manufacturing enterprises is illustrated by Fig.1. …… Logistics resources in manufacturing enterprises Resources 1 Ovehead Resources 3 Resources p Purchase Logistics Production Logistics Sale Logistics Reverses and wa waste material logistics Activity 1 Activity x … Activity 1 Activity y … Activity 1 Activity z … Activity 1 Activity u … Resources2 Ovehead resources Direct resources Purchase Logistics Production Logistics Sale Logistics Reverses and wa waste material logistics Cost 1 Cost v … Cost 1 Cost w … Cost 1 Cost m … Cost 1 Cost n … Product logistics Logistics in manufacturing enterprises Logistics efficiency of value chain Logistics cost drives analysis and activity reform Total logistics activity reduction in manufacturing enterprises Fig.1 Mechanism of logistics cost control in manufacturing enterprises
Every manufacturing enterprise can get much available logistics activity informations through logistics cost datum dimining.
Integrated Control System of Logistics Cost Based on ABC in Manufacturing Enterprise Based on the accurate logistics activity cost information of all products provided by ABC[5,6], manufactruing enterprises can introduce beforehand controll, process control, and afterwards controll based logistics cost datum and value chain efficiency analysis.
Online since: February 2012
Authors: Antonio Del Prete, Gabriele Papadia, Alessandro Spagnolo
The advantages of hydroformed parts include the increased strength to weight, weight reduction through more efficient section design, reduction of number of parts and subassemblies, improved quality of formed components in terms of dimensional stability and repeatability and reduced tooling developing costs [3].
The reference status, corresponding to the upper level, is in solid line while the lower level is in dotted line Figure 4: Independent actuators positions on the blankholder profile Anova Analysis The correct analytical approach to evaluate the influence of process parameters on HIMB data is the ANOVA method.
Online since: October 2018
Authors: Alicia Mašlejová, Martin Černík, Atila Drotár, Pavol Zubko
Generally, rollers are used in reduction furnaces with N/H atmospheres with working temperatures up to 1100°C and expected lifetime operation up to 3 years [1].
Investigated Materials Fused silica rollers The roller was in service for approx. 2 years with significant thickness reduction and occurrence of chip offs on the surface.
Fig. 3 Typical microstructure of rollers in as received state (SiO2 content 99.69%) Fig. 4 Typical microstructure of broken roller (SiO2 content 95.45%) Fig. 5 Presence of iron (light spots) at the surface of rolls, mostly in the vicinity of cracks Fig. 6 XRD data of the build-up surface Mechanical properties of roller at macroscale were measured by compression strength.
Online since: June 2014
Authors: Jorge López-Puente, Ramón Zaera, David Varas
When the wall studied was perpendicular to the plates added, a reduction of the displacement with respect to the reference model was observed, Fig.6 and Fig.7.
Therefore it can be concluded that the reduction of the displacement in the walls of the tank considered is basically due to the fact that the plates improve the structure bending strength and not to a change in the evolution of the cavity that happens when the plates are parallel to the impact walls.
Johnson and W.H.D Cook: A constitutive model and data for metals subjected to large strains, high strain rates, and temperatures.
Online since: August 2013
Authors: Yun Long Lv, Quan Yang Shou, Fei Hai Wu
In order to do the most effective things, experiments should be done to get the accurate data about which fiber should be added and how much to add.
Designers should know the reduction of stiffness may lead to overall and local instability, so there is a practical limit to the thickness of member(such as piers, flange, the girder web), apparently reliable minimum thickness is related to the protective cover, reinforcement configuration and workability of concrete pouring The fire performance of high strength concrete is poor.
But for high- strength materials, elastic deformation of the total share is larger, if ignore the deformation, means made greater reduction of material deformation performance, thus to some extent, affect the application of high-strength concrete, especially the field which have higher requirements for seismic performance of structure.
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