A Shock Factor Based Approach for the Damage Assessment of Plane Plates Subjected to Underwater Explosion

2006 ◽  
Vol 41 (6) ◽  
pp. 417-425 ◽  
Author(s):  
R Rajendran ◽  
K Narasimhan
Keyword(s):  
Damage Assessment ◽  
Underwater Explosion

Underwater Explosion in a Pool and Damage Assessment: A Global Approach From Far-Field to Close Range

2004 ◽  
Author(s):  
O. Loiseau ◽  
K. Cheval ◽  
B. Autrusson
Keyword(s):  
Damage Assessment ◽  
High Strain ◽  
Global Analysis ◽  
Underwater Explosion ◽  
Local Analysis ◽  
Strain Rates ◽  
Method Of Images ◽  
Structure Response ◽  
Starting Point ◽  
Close Range

The concern of this paper is the study of the effects of the detonation produced by an underwater explosive device. This work applies in particular to the study of some industrial pools, filled with water and a few meters deep. These pools are generally build so as to ensure a certain watertightness, this function being obtained for instance by the adjunction of an internal liner, a few millimeters thick and made of stainless steel. Here, we focus on the possible loss of this function both by the damage caused to concrete and the perforation of the liner. Those damages could be either due on one hand to the local deformations related to the global structure response and on the other hand to the local effects of the explosion. The first aspect has been investigated previously, using in particular the so-called “Method of Images (MOI)” (F. Delmaire-Sizes et al, 2001). The second aspect only occurs when the device is in a sufficiently close range so that the pressures produced by the detonation can cause volumetric damage into the materials. The starting point of this second phenomenon is investigated in the paper on the basis of a numerical model for concrete under high pressure and high strain rates (T. J. Holmquist, 1993). The second phenomenon comes in addition with the first one. An example is conducted showing how numerical simulations for the local analysis, coupling Eulerian and Lagrangian computations, complete the previous global analysis.

Effective shock factors for the inelastic damage prediction of clamped plane plates subjected to non-contact underwater explosion

2009 ◽  
Vol 44 (3) ◽  
pp. 211-220 ◽  
Author(s):  
R Rajendran
Keyword(s):  
Damage Assessment ◽  
Underwater Explosion ◽  
Strain Analysis ◽  
Coupling Factor ◽  
Yield Response ◽  
Rectangular Plates ◽  
Current Investigation ◽  
Damage Scenario ◽  
Damage Prediction ◽  
Inelastic Damage

Shock factors are conventionally used to designate the effect of an underwater explosion on a target. The concept of the effective shock factor was introduced by Rajendran and Narasimhan in a paper entitled ‘A shock factor based approach for the damage assessment of plane plates subjected to underwater explosion’, published in the Journal of Strain Analysis in 2006 (volume 41, issue 6, pages 417–425) for predicting the elastic and yield response of circular and rectangular plates; it was revealed that the coupling factor drastically influences the effect of shock factor on the response of plane plates. It will be of immense use to the designer if effective shock factors are introduced for predicting the inelastic damage of target plates, as shock factors notionally present a pessimistic picture about the damage scenario. The current investigation introduces the concept of effective shock factors to the existing prediction methodologies for estimating inelastic damage of plane plates. Water-backed plate is analysed along with air-backed plates to represent the water-filled side shell of a ship.

A COMPARATIVE DAMAGE STUDY OF AIR- AND WATER-BACKED PLATES SUBJECTED TO NON-CONTACT UNDERWATER EXPLOSION

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1311-1318 ◽  
Author(s):  
R. RAJENDRAN ◽  
J. M. LEE
Keyword(s):  
Damage Assessment ◽  
Shock Loading ◽  
Underwater Explosion ◽  
Ship Design ◽  
Experimental Results ◽  
Underwater Shock ◽  
Motivating Factor ◽  
Damage Study ◽  
Side Shell

The response of the side shell to non-contact underwater explosion is of major concern in ship design. While extensive research is carried out on air-backed plates, relatively less attention is paid to water-backed plates. Nevertheless, the response of the water-backed plates becomes relevant when the water filled side shells are exposed to an underwater shock loading. Availability of scant information on the experimental results of water-backed plates is the primary motivating factor to make analytical estimates. These estimates are provided in comparison with an air-backed plate for identical attack geometry and target parameters. This work aims to bring out a comparative procedure for the damage assessment between air- and water-backed plates so that the response of the latter can be presented in terms of that of the former.

A Study on the Characteristics of Underwater Explosion for the Development of a Non-Explosive Test System

2020 ◽  
Vol 57 (6) ◽  
pp. 322-330
Author(s):  
Hansol Lee ◽  
Kyudong Park ◽  
Yangsub Na ◽  
Seunggyu Lee ◽  
Kyunghoon Pack ◽  
...  
Keyword(s):  
Underwater Explosion ◽  
Test System

Aircraft Battle Damage Assessment and Repair (ABDAR). Volume 3: Field Test Report

2000 ◽  
Author(s):  
Scott MacBeth ◽  
Johnnie Jernigan ◽  
Jackie Grody ◽  
Donald L. Thomas ◽  
Michael E. Clark
Keyword(s):  
Field Test ◽  
Damage Assessment ◽  
Test Report ◽  
Battle Damage Assessment

Wildfire Damage Assessment of a Young Oak Forest in Pennsylvania

2013 ◽  
Vol 23 (1) ◽  
pp. 91-104 ◽  
Author(s):  
Marc D. Abrams ◽  
Sarah E. Johnson
Keyword(s):  
Damage Assessment ◽  
Oak Forest

scholarly journals Features of Cross-Correlation Analysis in a Data-Driven Approach for Structural Damage Assessment

Sensors ◽  
2018 ◽  
Vol 18 (5) ◽  
pp. 1571 ◽  
Author(s):  
Jhonatan Camacho Navarro ◽  
Magda Ruiz ◽  
Rodolfo Villamizar ◽  
Luis Mujica ◽  
Jabid Quiroga
Keyword(s):  
Correlation Analysis ◽  
Damage Assessment ◽  
Structural Damage ◽  
Cross Correlation ◽  
Data Driven ◽  
Cross Correlation Analysis ◽  
Data Driven Approach
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