Optimized bolt tightening procedure for different tightening strategies—FEA study

2016 ◽  
Vol 231 (2) ◽  
pp. 236-249 ◽  
Author(s):  
Muhammad Abid ◽  
Ayesha Khan ◽  
Masroor Hussain ◽  
Hafiz Abdul Wajid
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimization Algorithm ◽  
Control Method ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Torque Control ◽  
Element Analysis ◽  
Pipe Joints ◽  
Bolted Flange

This paper presents results of detailed nonlinear finite element analysis of gasketed bolted flange pipe joints of different sizes (1, 4, 5, 6, 8, 10, 20 in.) of 900# pressure class for achieving proper preload close to the target stress values with and without considering yielding at bolt and flange and gasket crushing recommended by ASME and industrial guidelines for optimized performance using customized optimization algorithm. In addition, two strategies torque control method and stretch control method are used which is a normal practice in the industry.

Simulation Study on Armor-Piercing Effect of Armor-Piercing Bomb

2013 ◽  
Vol 456 ◽  
pp. 55-59
Author(s):  
Ren Bin Zhou ◽  
Xue Bing Liao ◽  
An Qing Ming ◽  
Yong Feng Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Simulation Study ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Analysis Program ◽  
Element Analysis ◽  
Aluminum Target

Studying the armor-piercing effect of armor-piercing bomb that attacks aluminum target is essential, because the target can be considered the simulation of the actual fight equipment. Based on the hypothesis about building the fraction field, the armor-piercing effect of armor-piercing bomb is analyzed, and the velocity and the intruding depth parameter model of armor-piercing effect are established. Taking a certain armor-piercing bomb as example, the intruding processes of armor-piercing effect are simulated by using the nonlinear finite element analysis program LS-DYNA, while aluminum target simulates the wall of combat equipment in two different conditions. At last, the finite element simulated results are given and analyzed that agree with the experiments.

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