scholarly journals A Comparison of Simulation’s Results with Experiment on Water Mitigation of an Explosion

1999 ◽  
Vol 6 (2) ◽  
pp. 73-80 ◽  
Author(s):  
W.K Chong ◽  
K.Y. Lam ◽  
K.S. Yeo ◽  
G.R. Liu ◽  
O.Y. Chong
Keyword(s):  
United States ◽  
Experimental Data ◽  
Finite Element ◽  
United States Army ◽  
Peak Pressure ◽  
Three Dimensional ◽  
The United States ◽  
Small Scale ◽  
Finite Element Code ◽  
Good Comparison

This paper presents a comparison of simulation’s results with the experimental data from a series of small-scale tests conducted by Joachim and Lunderman of the United States Army Engineer Waterways Experiment Station. The purpose of the experiments was to evaluate the effect of water as a mean of reducing airblast pressure from accidental explosions in underground magazines. In the present study, a series of three-dimensional numerical calculations were conducted using a Multimaterial Eulerian Finite Element Code. Results from the numerical simulations show good comparison with the experimental data for the case with and without water. Our simulation ascertains the mitigation effects of water in reducing the maximum peak pressure and impulse density due to an explosion.

Failure From Creep as Influenced by the State of Stress

1943 ◽  
Vol 10 (4) ◽  
pp. A202-A212
Author(s):  
W. Siegfried
Keyword(s):  
United States ◽  
Experimental Data ◽  
Grain Boundaries ◽  
Three Dimensional ◽  
The United States ◽  
Dimensional System ◽  
State Of Stress ◽  
Brittle Fractures ◽  
Combined Action ◽  
Three Dimensional System

Abstract As early as 1912, it was pointed out by Rosenhain and Ewen (1) that the behavior of metals at high temperatures could be explained by the combined action of the crystals and the so-called grain boundaries. This theory was also made use of later to explain problems in connection with creep phenomena (2). The author discusses subsequent studies in the United States and Germany, relating to the occurrence of brittle fractures in metals after long periods of time. With the aid of the Rosenhain-Ewen conceptions, he attempts to reconcile discrepancies between recent observations on the occurrence of inter-crystalline fractures after long test periods. His evaluation of the theories cited offers an explanation of various phenomena which previously could not be interpreted, and also furnishes a basis for determining the risk of failure with creep in a three-dimensional system of stress. He concludes that the problem of calculating the strength of a material subjected to creep is actually solved only when the metallurgist and the steel manufacturer are in a position to furnish the designer with complete experimental data enabling him to predict failure for all systems of stress occurring in practice.

Review of Personnel work in the United States Army.

1919 ◽  
Vol 10 (9) ◽  
pp. 476-476
Author(s):  
No authorship indicated
Keyword(s):  
United States ◽  
United States Army ◽  
The United States
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