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Modeling Free Vibration of a doubly-clamped beam with initial stress
Posted Feb 25, 2012, 8:09 p.m. EST Structural Mechanics Version 3.5a 1 Reply
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Hello all,
I am interested to simulate the eignefrequency analysis of a doubly clamped beam which is under a certain initial stress due to fabrication.
Can anybody help me to define the initial stress tensor parameters in terms of x,y,z elements and sign accurately?
Thanks,
Nilufar
I am interested to simulate the eignefrequency analysis of a doubly clamped beam which is under a certain initial stress due to fabrication.
Can anybody help me to define the initial stress tensor parameters in terms of x,y,z elements and sign accurately?
Thanks,
Nilufar
1 Reply Last Post Feb 26, 2012, 2:39 a.m. EST
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Posted:
1 decade ago
Hi
To write out thefull stress tensor is very tricky (at least I find so) the easiest is to reconstruct the stress how it appears, there is at least one model in the model library of a two layer plate being prestressed by differential themal exansion mimiking the manufacturing process. This then, via a stationary or combined statonary analysis can give you the initial stress for the eigenfrequency analysis
--
Good luck
Ivar
To write out thefull stress tensor is very tricky (at least I find so) the easiest is to reconstruct the stress how it appears, there is at least one model in the model library of a two layer plate being prestressed by differential themal exansion mimiking the manufacturing process. This then, via a stationary or combined statonary analysis can give you the initial stress for the eigenfrequency analysis
--
Good luck
Ivar