Results 31 to 40 of about 2,342,201 (299)

Elastoplastic dilatancy relations of unsaturated clayey sand

open access: yesYantu gongcheng xuebao, 2018
The modified Lade model and Barcelona unsaturated elastoplastic model are used to describe the stress and strain relationship of unsaturated clayey sand, The tests on three types of stress paths tests are conducted.
ZHU Qing-qing 1, 2, MIAO Qiang-qiang 3, CHEN Zheng-han 4, YAO Zhi-hua 5, ZHANG Jun-hao 4
doaj   +1 more source

Anisotropic behaviour law for sheets used in stamping: A comparative study of steel and aluminium [PDF]

open access: yes, 2003
For a car manufacturer, reducing the weight of vehicles is an obvious aim. Replacing steel by aluminium moves towards that goal. Unfortunately, aluminium's stamping numerical simulation results are not yet as reliable as those of steel.
Bruno Macquaire   +4 more
core   +6 more sources

Design of one-dimensional Lambertian diffusers of light [PDF]

open access: yes, 2001
We describe a method for designing a one-dimensional random surface that acts as a Lambertian diffuser. The method is tested by means of rigorous computer simulations and is shown to yield the desired scattering pattern.Comment: 6 pages, 2 ...
A A Maradudin   +5 more
core   +3 more sources

Applications of Burzynski failure criteria. Part I. Isotropic materials with asymmetry of elastic range

open access: yesEngineering Transactions, 2014
The main idea of energy-based hypothesis of material effort proposed by Burzynski is briefly presented and the resulting failure criteria are discussed.
T. FRĄŚ   +3 more
doaj   +1 more source

Description of the Yield State of Bioplastics on Examples of Starch-Based Plastics and PLA/PBAT Blends

open access: yesEngineering Transactions, 2014
The present work concerns the description of the yield state of biodegradable materials. As examples, biodegradable polymers are chosen – cornpole CRP-M2, starch fatty acid ester, and PLA/PBAT, poly(lactic acid) (PLA) blended with poly(butylene adipate ...
Teresa FRAS   +4 more
doaj   +1 more source

Yield Criterion Accounting for the Influence of the Third Invariant of Stress Tensor Deviator. Part II. Analysis of Convexity Condition of the Yield Surface

open access: yesEngineering Transactions, 2014
General form of yield condition for isotropic and homogeneous bodies is considered in the paper. In the space of principal stresses, the limit condition is graphically represented by a proper regular surface which is assumed here to be at least of C2 ...
P. SZEPTYŃSKI
doaj   +1 more source

The energetics of water on oxide surfaces by quantum Monte Carlo

open access: yes, 2006
Density functional theory (DFT) is widely used in surface science, but gives poor accuracy for oxide surface processes, while high-level quantum chemistry methods are hard to apply without losing basis-set quality.
Alfe`, D., Gillan, M. J.
core   +1 more source

Aluminium sheet forming simulations: influence of the yield surface [PDF]

open access: yes, 2002
The accuracy of simulations of the plastic deformation of sheet metal depend to a large extend on\ud the description of the yield surface, the hardening and the friction.
Bolt, P.J.   +3 more
core   +1 more source

Secondary Electron Emission from Surfaces with Small Structure

open access: yes, 2015
It is found that for objects possessing small surface structures with differing radii of curvature the secondary electron emission (SEE) yield may be significantly higher than for objects with smooth surfaces of the same material.
Dzhanoev, A. R.   +4 more
core   +1 more source

Clinical Insights Into Hypercalcemia of Malignancy in Childhood

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Hypercalcemia of malignancy (HCM) is a rare but life‐threatening metabolic emergency in children that occurs in less than 1% of pediatric cancer cases, with a reported incidence ranging from 0.4% to 1.0% across different studies. While it is observed in 10%–20% of adult malignancies, pediatric HCM remains relatively uncommon.
Hüseyin Anıl Korkmaz
wiley   +1 more source

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