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Modeling Free Vibration of a doubly-clamped beam with initial stress
Posted 25 feb 2012, 20:09 GMT-5 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 26 feb 2012, 02:39 GMT-5
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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