Effects of Deformation Twinning on Energy Dissipation in High Rate Deformed Zirconium

2007 ◽  
Vol 38 (12) ◽  
pp. 2916-2927 ◽  
Author(s):  
H.A. Padilla ◽  
C.D. Smith ◽  
J. Lambros ◽  
A.J. Beaudoin ◽  
I.M. Robertson
Keyword(s):  
Energy Dissipation ◽  
Deformation Twinning ◽  
High Rate

A thermodynamic framework to analyze the thermal shock response in an anisotropic hollow cylinder with energy dissipation

2018 ◽  
Vol 14 (3) ◽  
pp. 410-430 ◽  
Author(s):  
Siddhartha Biswas ◽  
Soumen Shaw
Keyword(s):  
Energy Dissipation ◽  
Thermal Shock ◽  
Hollow Cylinder ◽  
Integral Transform ◽  
Generalized Thermoelasticity ◽  
High Rate ◽  
Content Type ◽  
Short Period ◽  
Shock Response ◽  
Consistent Manner

Purpose The purpose of this paper is to analyze the thermal shock response on the deformation of circular hollow cylinder in a thermodynamically consistent manner. Design/methodology/approach The investigation is carried out under the light of generalized thermoelasticity theory with energy dissipation. In order to obtain the analytical expressions of the components of stress and strain fields, appropriate integral transform technique is adopted and the salient features are emphasized. Findings It has been observed that the existence of energy dissipation can minimize the development of the stress components into the cylindrical wall. Since more amount of heat is propagate into the medium in a short period of time consequently, the medium deformed in a high rate in presence of energy dissipation. Two special phenomena are also revealed in the particular cases. Originality/value The numerical simulated results are demonstrated through a numerous diagrams and some important observations are explained. This work may be helpful for those researchers who are devoted on several types of heat or fluid flow into the pipeline made with anisotropic solids.

Specific energy dissipation rate for super-high-rate anaerobic bioreactor

2011 ◽  
Vol 86 (5) ◽  
pp. 749-756 ◽  
Author(s):  
Xiaoguang Chen ◽  
Zheng Ping ◽  
Shuang Ding ◽  
Chongjian Tang ◽  
Jing Cai ◽  
...  
Keyword(s):  
Energy Dissipation ◽  
Specific Energy ◽  
Dissipation Rate ◽  
Energy Dissipation Rate ◽  
High Rate ◽  
Anaerobic Bioreactor

Photochemistry and xanthophyll cycle-dependent energy dissipation in differently oriented cladodes of Opuntia stricta during the winter

1998 ◽  
Vol 25 (1) ◽  
pp. 95 ◽  
Author(s):  
David H. Barker ◽  
Barry A. Logan ◽  
William W. Adams III ◽  
Barbara Demmig-Adams
Keyword(s):  
Energy Dissipation ◽  
Excitation Energy ◽  
Xanthophyll Cycle ◽  
Photosynthetic Apparatus ◽  
High Rate ◽  
Psii Efficiency ◽  
Thermal Energy Dissipation ◽  
Dramatic Decline ◽  
Absorption Of Light ◽  
Cycle Dependent

The photosynthetic and energy dissipation responses of four differently oriented photosynthetic surfaces (cladodes) from the cactus Opuntia stricta (Haw.) Haw. were studied in the field during the winter in Australia. Even under very low PFD (i.e. -2 s-1) all surfaces experienced a dramatic decline in photosystem II (PSII) efficiency during the morning period when temperatures were below freezing. However, light energy absorbed during the warmer afternoon period was more efficiently utilised for photochemistry with less diversion through the thermal energy dissipation pathway. Low temperature presumably reduced the proportion of excitation energy that could be utilised photosynthetically, resulting in a high rate of energy dissipation with a concomitant decline in PSII efficiency. A lag in the diurnal de-acidification of malic acid, and therefore the availability of endogenous CO2, may have also contributed to the low rate of photochemistry during the morning period. We interpret the increase in energy dissipation and decline in PSII efficiency as a controlled response of PSII that is dependent upon the de-epoxidised components of the xanthophyll cycle under conditions when the absorption of light exceeds the capacity of the photosynthetic apparatus to process the excitation energy through photochemistry.

scholarly journals Hard versus soft impact modeling of vibro-impact systems with a moving base

2021 ◽  
Author(s):  
Andrzej Okolewski ◽  
Barbara Blazejczyk-Okolewska
Keyword(s):  
Energy Dissipation ◽  
High Rate ◽  
Impact Model ◽  
Equal Energy ◽  
Moving Base ◽  
Low Stiffness ◽  
Impact Models ◽  
Collision Models ◽  
Low Rate

AbstractSoft and hard impact models applied to modeling of vibro-impact systems with a moving base are discussed. The conditions under which two collision models are equivalent in terms of equal energy dissipation are derived. These conditions differ from those presented in the literature. It is shown that in the case of a stiff, harmonically moving base with a low rate of energy dissipation, both methods yield the same results, but an application of the soft impact model to either the base with low stiffness or even the stiff base with a high rate of energy dissipation leads to different results from the ones for the hard impact model.

Plastic deformation and twinning mechanisms in magnesian calcites: a non-equilibrium computer simulation study

2018 ◽  
Vol 20 (3) ◽  
pp. 1794-1799 ◽  
Author(s):  
Sanha Lee ◽  
Gøran Brekke-Svaland ◽  
Fernando Bresme
Keyword(s):  
Computer Simulation ◽  
Plastic Deformation ◽  
Energy Dissipation ◽  
Simulation Study ◽  
Mechanical Response ◽  
Deformation Twinning ◽  
Computer Simulation Study ◽  
Crystalline Structures ◽  
Non Equilibrium

Deformation twinning provides a mechanism for energy dissipation in crystalline structures, with important implications on the mechanical response of carbonate biogenic materials.

Structure of Palladium Single-Crystal Films Prepared by Flash Evaporation onto (001) NaCl Substrates

1970 ◽  
Vol 28 ◽  
pp. 456-457
Author(s):  
L. E. Murr ◽  
G. Wong
Keyword(s):  
Single Crystal ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
High Rate ◽  
Flash Evaporation ◽  
Optimum Load ◽  
Single Crystal Films ◽  
Crystal Films ◽  
A Current

Palladium single-crystal films have been prepared by Matthews in ultra-high vacuum by evaporation onto (001) NaCl substrates cleaved in-situ, and maintained at ∼ 350° C. Murr has also produced large-grained and single-crystal Pd films by high-rate evaporation onto (001) NaCl air-cleaved substrates at 350°C. In the present work, very large (∼ 3cm2), continuous single-crystal films of Pd have been prepared by flash evaporation onto air-cleaved (001) NaCl substrates at temperatures at or below 250°C. Evaporation rates estimated to be ≧ 2000 Å/sec, were obtained by effectively short-circuiting 1 mil tungsten evaporation boats in a self-regulating system which maintained an optimum load current of approximately 90 amperes; corresponding to a current density through the boat of ∼ 4 × 104 amperes/cm2.

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