BLAST WAVES GENERATED BY NONIDEAL DETONATION OF CHARGES EXPLODED WITH TIME DISTRIBUTED ENERGY RELEASE

2018 ◽  
Vol 11 (2) ◽  
pp. 126-130
Author(s):  
P. V. Komissarov ◽  
◽  
A. A. Borisov ◽  
B. A. Khasainov ◽  
B. S. Ermolaev ◽  
...  
Keyword(s):  
Energy Release ◽  
Blast Waves ◽  
Distributed Energy ◽  
Nonideal Detonation

Blast waves generated in an unconfined space by a nonideal detonation of high-density aluminum-enriched formulations

2009 ◽  
Vol 3 (6) ◽  
pp. 936-944 ◽  
Author(s):  
A. A. Borisov ◽  
A. A. Sulimov ◽  
M. K. Sukoyan ◽  
P. V. Komissarov ◽  
I. O. Shamshin ◽  
...  
Keyword(s):  
Blast Waves ◽  
High Density ◽  
Nonideal Detonation

Generation of blast waves in a channel by nonideal detonation of aluminum-enriched high-density compositions

2009 ◽  
Vol 3 (5) ◽  
pp. 789-797 ◽  
Author(s):  
A. A. Sulimov ◽  
A. A. Borisov ◽  
B. S. Ermolaev ◽  
M. K. Sukoyan ◽  
V. E. Khrapovskii ◽  
...  
Keyword(s):  
Blast Waves ◽  
High Density ◽  
Nonideal Detonation

Energy release of mixed explosives during propagation of a nonideal detonation under conditions similar to the operation conditions of a blasthole charge

2007 ◽  
Vol 43 (4) ◽  
pp. 468-475
Author(s):  
A. V. Anan’in ◽  
A. N. Dremin ◽  
C. Cunnigham ◽  
S. A. Koldunov ◽  
B. P. Kryukov ◽  
...  
Keyword(s):  
Energy Release ◽  
Nonideal Detonation ◽  
Operation Conditions

Determinants and barriers of PV self-consumption in Spain from the perception of the installers for the promotion of distributed energy systems

2020 ◽  
pp. 153-169
Author(s):  
José Ángel Gimeno ◽  
Eva Llera Sastresa ◽  
Sabina Scarpellini
Keyword(s):  
European Union ◽  
Energy Transition ◽  
Legal Framework ◽  
Low Carbon ◽  
The European Union ◽  
Distributed Energy ◽  
Sustainable Solutions ◽  
Highly Sensitive ◽  
Transition Scenario

Currently, self-consumption and distributed energy facilities are considered as viable and sustainable solutions in the energy transition scenario within the European Union. In a low carbon society, the exploitation of renewables for self-consumption is closely tied to the energy market at the territorial level, in search of a compromise between competitiveness and the sustainable exploitation of resources. Investments in these facilities are highly sensitive to the existence of favourable conditions at the territorial level, and the energy policies adopted in the European Union have contributed positively to the distributed renewables development and the reduction of their costs in the last decade. However, the number of the installed facilities is uneven in the European Countries and those factors that are more determinant for the investments in self-consumption are still under investigation. In this scenario, this paper presents the main results obtained through the analysis of the determinants in self-consumption investments from a case study in Spain, where the penetration of this type of facilities is being less relevant than in other countries. As a novelty of this study, the main influential drivers and barriers in self-consumption are classified and analysed from the installers' perspective. On the basis of the information obtained from the installers involved in the installation of these facilities, incentives and barriers are analysed within the existing legal framework and the potential specific lines of the promotion for the effective deployment of self-consumption in an energy transition scenario.

Calculating Energy Release Rate as a Function of Crack Length Using a Multiple-Step Crack Closure Technique in Tire Finite Element Models

2018 ◽  
Vol 46 (3) ◽  
pp. 130-152
Author(s):  
Dennis S. Kelliher
Keyword(s):  
Finite Element ◽  
Energy Release Rate ◽  
Crack Length ◽  
Energy Release ◽  
Crack Closure ◽  
Release Rate ◽  
Fatigue Behavior ◽  
Three Dimensions ◽  
Quantitative Prediction ◽  
Closure Technique

ABSTRACT When performing predictive durability analyses on tires using finite element methods, it is generally recognized that energy release rate (ERR) is the best measure by which to characterize the fatigue behavior of rubber. By addressing actual cracks in a simulation geometry, ERR provides a more appropriate durability criterion than the strain energy density (SED) of geometries without cracks. If determined as a function of crack length and loading history, and augmented with material crack growth properties, ERR allows for a quantitative prediction of fatigue life. Complications arise, however, from extra steps required to implement the calculation of ERR within the analysis process. This article presents an overview and some details of a method to perform such analyses. The method involves a preprocessing step that automates the creation of a ribbon crack within an axisymmetric-geometry finite element model at a predetermined location. After inflating and expanding to three dimensions to fully load the tire against a surface, full ribbon sections of the crack are then incrementally closed through multiple solution steps, finally achieving complete closure. A postprocessing step is developed to determine ERR as a function of crack length from this enforced crack closure technique. This includes an innovative approach to calculating ERR as the crack length approaches zero.

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