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Online since: September 2013
Authors: Song Gao, Ya Bin Wang, Xiu Feng Li
Because of the error of dynamic test itself is great, even if the strain rate is known, failure strain value under the certain condition is still only refered by relevant information regardless of temperature and is more relied on experience or large number of experimental results to correct the value.
The model is composed of eight nodes hexahedron units; the number of units is about 3 million, as shown in figure .2.
At that time, severe plastic deformation occurred, steel grain were badly crushed, or even broken, and it was deleted till the equivalent strain up to 0.065 according to failure criterion. 
Online since: October 2021
Authors: Jassim M. Marei, Abed A. Khalefa, Qutaiba A. Abduljabbar, Jamal M. Rzaij
This system contains many homologous compounds of the formula Znk In2Ok+1 (k=integer number) described as a structure with a k number of ZnO layers sandwiched between two In2O3 layers [9].
The increase in crystallite size may be due to neighboring small grains joining together by melting their surfaces, resulting in large particles forming as the Ts rises [20].
Online since: March 2009
Authors: Piotr Lacki
Aluminium, as a material used for drawn-parts, has both a number of advantages and disadvantages.
Minimum and maximum values of the cup thickness in the individual stamping operations operation number gmax [mm] gmin [mm] 1st operation 0.655 0.474 2nd operation 0.749 0.455 3rd operation 0.818 0.416 4th operation 0.768 0.416 Summary Thinning of the cup wall determines the strength and usefulness of the cup.
O'Donnell: Processing and properties of ultrafine-grain aluminium alloy 6111 sheet.
Online since: August 2004
Authors: Jan D. Achenbach
These properties are very sensitive to a number of factors, which are determined by the deposition technique and by processing parameters.
θLSAW 1.20 5600 Acoustic Lens Coupling Fluid Specimen x z Title of Publication (to be inserted by the publisher) Laser-Based Ultrasonics The generation of ultrasound by laser irradiation provides a number of advantages over conventional generation by piezoelectric transducers.
Grain, H.J.
Online since: December 2010
Authors: Akira Sugiyama, Itsuo Ohnaka, Kunihiko Konishi, Yoshinori Obana, Nobuo Sako, Jin Dong Zhu
If we use the FEM to handle a large number of mold elements, we can easily decrease the number of elements with using larger elements in the sand mold.
It seems that the gasification might be delayed on EPS grain boundaries. 5.
Online since: June 2006
Authors: Xiao Zhi Hu, Kai Duan
To demonstrate self-consistency with a Weibull distribution, the total number of flaws N(c) larger than c can be determined by integrating Eq. 3.
Deconvolution of fits to strength data in Fig. 1 to determine number of flaws per unit area of specimen tensile surface for silicon single crystal beam specimens.
We may also expect changes when comparing single crystal with polycrystalline silicon specimens because of the role of grain boundary defects in the latter, with the potential for change from surface to volume defects as well as change in toughness.
Online since: June 2007
Authors: Jong Taek Yeom, Nho Kwang Park, Dong Geun Lee, Jeoung Han Kim, Chong Soo Lee
The average grain size of the heat-treated Waspaloy disc was ASTM 7~8(25mm~35mm), as shown in Fig. 1.
Continuum damage model are coupled based on the assumption that fatigue damage and creep damage accumulate additively: f R N dN t dt dD += (14) Where tR is the time to rupture in creep at constant stress and temperature, and Nf is the number of cycles to failure in fatigue under a periodic loading conditions.
When the load is periodic, the number of cycles to failure (NR) under combined fatigue-creep can be described by: ∫∆ +=+= t F C f R R NNNt dt N 0 111 1 (15) Where t∆ is the total period of the cyclic test.
Online since: October 2010
Authors: Federico M. Mazzolani, A. Marzo, Beatrice Faggiano, Maria Rosaria Grippa
Several configurations of the devices were examined, they being obtained by varying the main parameters which affect the behaviour, such as number of steel parts, both width and thickness of collars and preloading forces in the bolts (Faggiano et al. 2009a).
The latter is due to the complete rupture of the tension side of the timber beams, which are affected by natural defects, such as knots and slope of grain (Fig. 4c).
So, future research activity should consists in additional experimental tests on composite systems, with different geometrical features, aiming at achieving an exhaustive number of tests for the complete characterization of the system behaviour.
Online since: November 2015
Authors: Tomasz Kik, Marek Slovacek, Jaromir Moravec, Mojmir Vanek
Thanks to that it is possible to decrease to the minimum numbers of experiments and also time needed to prepare it.
Specific material law formulations take into consideration thermal-elastic-plastic material behaviour and hardening including phase transformations, visco-plastic material behaviour including phase transformations, transformation plasticity, individual properties of phases, nonlinear mixture rules of properties of phases and restoring of strain hardening during phase transformation and the influence of the size of the austenite grains formed [1,2].
Decreasing number of experiment is a faster response on the market demands and saving money.
Online since: March 2007
Authors: Jilt Sietsma, L. Strezov, T. Zuidwijk, Dominic Phelan, Rian Dippenaar
The study of strip casting raises a number of issues to be dealt with.
The formation of nanometre-sized precipitates under rapid solidification conditions has been noted in a number of studies [5,6,7] for a range of alloys, and implicated in an increase in yield strength, work hardening and in recrystallisation modification.
The experimental design has close similarities to that used by van Boggelen et al. [15] to study grain coarsening of semi-solid Al-Cu alloys Figure 2 Schematic representation of the experimental arrangement for strip casting simulation in a Gleeble 3500/3800 Development work conducted thus far has concentrated on establishing control over the heating of the sample, cooling the copper rods and achieving rapid quenching.
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