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Contact stress varies with pitch distance

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Mechanicslearner

Structural
Jan 15, 2016
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Hello,

I am simulating a 12 filar and 9 filar wire torsion test. I can see contact stress values even after 30 degress in 12 filar where pitch distance is more but contact stress in 9 filar even after 180 degrees rotation is zero. I am analysing using abaqus with 1D element model and I use general contact method. Is the nature of the wire same or am doing my analysis wrong by missing some input values? Please let me know asap
 
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