scholarly journals LOFT fuel bundle structural response to mechanical loads during subcooled LOCE

1980 ◽  
Author(s):  
J. Martinell
Keyword(s):  
Structural Response ◽  
Mechanical Loads ◽  
Fuel Bundle

Analysis and design of thermo-mechanical interfaces

2012 ◽  
Vol 60 (2) ◽  
pp. 205-213
Author(s):  
K. Dems ◽  
Z. Mróz
Keyword(s):  
Optimality Conditions ◽  
Mechanical Loading ◽  
Material Properties ◽  
Structural Response ◽  
External Boundary ◽  
Mechanical Loads ◽  
Internal Interface ◽  
Analysis And Design ◽  
First Order ◽  
Mechanical Nature

Abstract. An elastic structure subjected to thermal and mechanical loading with prescribed external boundary and varying internal interface is considered. The different thermal and mechanical nature of this interface is discussed, since the interface form and its properties affect strongly the structural response. The first-order sensitivities of an arbitrary thermal and mechanical behavioral functional with respect to shape and material properties of the interface are derived using the direct or adjoint approaches. Next the relevant optimality conditions are formulated. Some examples illustrate the applicability of proposed approach to control the structural response due to applied thermal and mechanical loads.

Linear and Nonlinear Finite Element Analysis of an Exhaust Manifold With Included Bellows

2007 ◽  
Author(s):  
Scott E. Steinbrink ◽  
Mahesh C. Aggarwal ◽  
Kapilla I. M. Shepherd
Keyword(s):  
Finite Element ◽  
Structural Response ◽  
Nonlinear Effects ◽  
Nonlinear Finite Element ◽  
Exhaust Manifold ◽  
Nonlinear Analyses ◽  
Element Analysis ◽  
Mechanical Loads ◽  
Low Stiffness ◽  
Linear And Nonlinear

The aim of this paper is to examine the utility of nonlinear analysis for structural response to thermal and mechanical loads, for a structure containing alternating regions of high and low stiffness as a result of inclusion of bellow sections. Utility is measured by comparison of results of linear and nonlinear analyses. The specific example used is that of an exhaust manifold for a large diesel engine. The paper discusses modeling of geometric and material nonlinearity, and makes recommendations in regard to which nonlinear effects are thought to be significant, based on the linear/nonlinear comparisons. The paper also contains general comments on the finite element modeling of structures containing bellows.

scholarly journals Tension causes structural unfolding of intracellular intermediate filaments

2020 ◽  
Author(s):  
Frederik Fleissner ◽  
Sachin Kumar ◽  
Noreen Klein ◽  
Daniel Wirth ◽  
Ravi Dhiman ◽  
...  
Keyword(s):  
Multivariate Data Analysis ◽  
Mammalian Cells ◽  
Structural Changes ◽  
Mechanical Load ◽  
Structural Response ◽  
Mechanical Tension ◽  
Mechanical Loads ◽  
Dynamics Simulations

AbstractIntermediate filament (IF) proteins are a class of proteins that constitute different filamentous structures in mammalian cells. As such, IF proteins are part of the load-bearing cytoskeleton and support the nuclear envelope. Molecular dynamics simulations have shown that IF proteins undergo secondary structural changes to compensate mechanical loads, which has been confirmed by experimental in vitro studies on IF hydrogels. However, the structural response of intracellular IF to mechanical load has yet to be elucidated in cellulo. Here, we use in situ nonlinear Raman imaging combined with multivariate data analysis to quantify the intracellular secondary structure of the IF cytoskeletal protein vimentin under different states of cellular tension. We find that cells under native cellular tension contain more unfolded vimentin than chemically or physically relaxed specimens. This indicates that unfolding of IF proteins occurs intracellularly when sufficient forces are applied, suggesting that IF structures act as local force sensors in the cell to mark locations under large mechanical tension.

Influence of the distribution of the shear walls on the seismic response of the buildings

2020 ◽  
Vol 15 (1) ◽  
pp. 37-44
Author(s):  
El Mehdi Echebba ◽  
Hasnae Boubel ◽  
Oumnia Elmrabet ◽  
Mohamed Rougui
Keyword(s):  
Structural Analysis ◽  
Seismic Response ◽  
Natural Frequency ◽  
Structural Design ◽  
Structural Response ◽  
Shear Walls ◽  
Structural Elements ◽  
Analysis Software ◽  
Ansys Apdl ◽  
The Impact

Abstract In this paper, an evaluation was tried for the impact of structural design on structural response. Several situations are foreseen as the possibilities of changing the distribution of the structural elements (sails, columns, etc.), the width of the structure and the number of floors indicates the adapted type of bracing for a given structure by referring only to its Geometric dimensions. This was done by studying the effect of the technical design of the building on the natural frequency of the structure with the study of the influence of the distribution of the structural elements on the seismic response of the building, taking into account of the requirements of the Moroccan earthquake regulations 2000/2011 and using the ANSYS APDL and Robot Structural Analysis software.

COMPUTATIONAL FLUID DYNAMIC INVESTIGATIONS ON EFFECTS OF CIRCULAR ROD INSERTS IN FAST REACTOR FUEL BUNDLE

2018 ◽  
Author(s):  
G Padmakumar ◽  
K. Velusamy ◽  
Bhamidi V. S. S. S. Prasad ◽  
P Lijukrishnan ◽  
P. Selvaraj
Keyword(s):  
Fast Reactor ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Reactor Fuel ◽  
Fuel Bundle ◽  
Fast Reactor Fuel

Hydroelastic effects in structural response under wave impact

2017 ◽  
Author(s):  
Liang-Yee Cheng ◽  
Rubens Augusto Amaro Junior
Keyword(s):  
Structural Response ◽  
Wave Impact
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