New Representations of Anisotropic Yield Functions and Implications in Terms of Calibration and Predictive Capabilities (Part I)

2021 ◽  
Author(s):  
Oana Cazacu ◽  
Nitin Chandola
Keyword(s):  
Yield Functions

The Impact of Climate Change on Storage-Yield Curves for Multi-Reservoir Systems

1999 ◽  
Vol 30 (2) ◽  
pp. 129-146 ◽  
Author(s):  
N. R. Nawaz ◽  
A. J. Adeloye ◽  
M. Montaseri
Keyword(s):  
Climate Change ◽  
Surface Fluxes ◽  
Runoff Coefficient ◽  
Impact Study ◽  
Yield Functions ◽  
Reservoir Systems ◽  
English System ◽  
Multiple Reservoir ◽  
The Impact ◽  
Impacts Of Climate Change

In this paper, we report on the results of an investigation into the impacts of climate change on the storage-yield relationships for two multiple-reservoir systems, one in England and the other in Iran. The impact study uses established protocol and obtains perturbed monthly inflow series using a simple runoff coefficient approach which accounts for non-evaporative losses in the catchment, and a number of recently published GCM-based scenarios. The multi-reservoir analysis is based on the sequent-peak algorithm which has been modified to analyse multiple reservoirs and to accommodate explicitly performance norms and reservoir surface fluxes, i.e. evaporation and rainfall. As a consequence, it was also possible to assess the effect of including reservoir surface fluxes on the storage-yield functions. The results showed that, under baseline conditions, consideration of net evaporation will require lower storages for the English system and higher storages for the Iranian system. However, with perturbed hydroclimatology different impacts were obtained depending on the systems' yield and reliability. Possible explanations are offered for the observed behaviours.

scholarly journals A method for smoothing multiple yield functions

2019 ◽  
Vol 121 (3) ◽  
pp. 434-449 ◽  
Author(s):  
Andy Wilkins ◽  
Benjamin W. Spencer ◽  
Amit Jain ◽  
Bora Gencturk
Keyword(s):  
Yield Functions

scholarly journals Sheet Forming Simulations of Automotive Parts using Different Yield Functions

2010 ◽  
Author(s):  
Jin-Woo Lee ◽  
Frédéric Barlat ◽  
Dong-Jin Kim ◽  
F. Barlat ◽  
Y. H. Moon ◽  
...  
Keyword(s):  
Sheet Forming ◽  
Yield Functions ◽  
Automotive Parts ◽  
Forming Simulations

Influence of Anisotropic Yield Functions on Parameters of Yoshida-Uemori Model

2013 ◽  
Vol 554-557 ◽  
pp. 2440-2452 ◽  
Author(s):  
Hirotaka Kano ◽  
Jiro Hiramoto ◽  
Toru Inazumi ◽  
Takeshi Uemori ◽  
Fusahito Yoshida
Keyword(s):  
Effective Strain ◽  
Yield Function ◽  
Strain Response ◽  
Material Parameters ◽  
International Conference ◽  
Polynomial Type ◽  
Calculated Stress ◽  
Yield Functions ◽  
Order Polynomial ◽  
Von Mises

Yoshida-Uemori model (Y-U model) can be used with any types of yield functions. The calculated stress strain response will be, however, different depending on the chosen yield function if the yield function and the effective strain definition are inappropriate. Thus several modifications to Y-U model were proposed in the 10th International Conference on Technology of Plasticity. It was ascertained that in the modified Y-U model, the same set of material parameters can be used with von Mises, Hill’s 1948, and Hill’s 1990 yield function. In this study, Yld2000-2d and Yoshida’s 6th-order polynomial type 3D yield function were examined and it was clarified that the same set of Y-U parameters can be used with these yield functions.

scholarly journals Фрагментация молекулы глютамина электронным ударом

2019 ◽  
Vol 45 (20) ◽  
pp. 43
Author(s):  
А.В. Папп ◽  
В.С. Вукстич ◽  
Л.Г. Романова ◽  
Т.А. Снегурская ◽  
И.Г. Мегела ◽  
...  
Keyword(s):  
Mass Spectra ◽  
High Energy ◽  
Electron Gun ◽  
Spectrometric Analysis ◽  
Analysis Technique ◽  
Yield Functions ◽  
Initial Molecule ◽  
Ionic Fragment ◽  
Energy Irradiation ◽  
Fragment Yield

Using the mass-spectrometric analysis technique, formation of the ionic products of the single and dissociative ionization of the glutamine molecule (C5H10N2O3) at its interaction with the low (70 eV) and high (11.5 MeV) energy electrons has been studied. The experimental mass-spectra of the above molecule measured at different irradiation doses (5, 10 and 20 kGy) and the near-threshold areas of the ionic fragment yield functions have been analyzed, the absolute ion fragment appearance energies have been found. The three-electrode electron gun and the electron accelerator (microtron) were used as the electron beam sources. The analysis of the behaviour of the measured glutamine molecule mass-spectra irradiated at the above doses demonstrates, as compared to the irradiated molecule mass-spectrum, that the high-energy irradiation of the initial molecule results in the irreversible changes of its structure.

scholarly journals Sensitivity of the 252Cf(sf) neutron observables to the FREYA input yield functions Y(A, Z, TKE)

2017 ◽  
Vol 146 ◽  
pp. 04003 ◽  
Author(s):  
Jørgen Randrup ◽  
Patrick Talou ◽  
Ramona Vogt
Keyword(s):  
Yield Functions

Non-linear influence of hydrostatic pressure on the yielding of asymmetric anisotropic sheet metals

2016 ◽  
Vol 23 (2) ◽  
pp. 159-180
Author(s):  
Farzad Moayyedian ◽  
Mehran Kadkhodayan
Keyword(s):  
Hydrostatic Pressure ◽  
Potential Functions ◽  
Face Centered Cubic ◽  
Sheet Metals ◽  
Strength Differential ◽  
Plastic Potential ◽  
Yield Functions ◽  
Non Linear ◽  
Data Points ◽  
Face Centered

The objective of the current research is the investigation into possible non-linear influence of hydrostatic pressure on yielding of asymmetric (exhibiting the so-called “strength-differential effect”) anisotropic sheet metals. To reach this aim, two yield functions are developed, called here “non-linear pressure sensitive criteria I and II,” (NPC-1 and NPC-2). In addition, the non-associated flow rules are employed for these new criteria. The yield functions are defined as non-linearly dependent on hydrostatic pressure, while the plastic potential functions are introduced to be pressure insensitive. To calibrate these criteria, the yield functions need 10 directional experimental yield stresses and the plastic potential functions need eight Lankford coefficients data points. Four well-known anisotropic sheet metals with different structures, namely AA 2008-T4, a Face Centered Cubic material (FCC), AA 2090-T3, a Face Centered Cubic material (FCC), AZ31, a hexagonal closed packed material (HCP) and high-purity [Formula: see text]-titanium (HCP) are considered as case studies. Finally, it is observed that NPC-1 and NPC-2 are more successful than previous criteria in anticipating directional strength and mechanical properties.

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