Dear All,
I just have a single element, I need to apply a plane stress condition as in the attached image.
For the boundary conditions;
• I have constrained the nodes 1 and 2 in the horizontal (x) direction
• I have constrained the nodes 1 and 3 in the vertical (Y) direction
• I have...
Thank you very much.
Does the attached picture show the trailer? You said the draw bar is the straight rectangular piece.What is the curved piece in the figure - is the curved piece the trailer?
What are the loads / state of stress on the bolt there?
Hi,
I'm not a mechanical or an automobile engineer and have a poor knowledge of vehicles as I don't drive.
I'm solving a particular problem in mechanics dealing with stress analysis which deals with a trailer hitch (See attached figure)
Can anyoen tell me ina very fundamental manner...
As per Maxwell reciprocal theorem, it is valid only for elastic materials and structures indergoing small displacements.That is k12 = k21, kij = kji hence stiffness matrix is symmetric.
Howbver, I just have been going through MY OWN written programs for geometric non linear problems and I...
Please can anyone help me?I'm confused here.
If I'm following unit of force as Newton, and length as mm; and stress as MPa,then for a consistent system of units (see link below);
http://www.dynasupport.com/howtos/general/consistent-units/
what should be the unit for:
1)density
2) rotation
Can we put it like this:
1)c= 0- undamped case
2)c>2√km means the system does NOT oscillate thus returns to equilibrium position without oscillating
3)c<2√km system oscillates with a decreasing amplitude and eventually stops oscillating.
@boneh3ad:Thanks a lot for the swift reply.
When you say:
do you mean (perhaps I'm looking for a physical meaning of the word 'exponential' here) that it moves very rapidly to the equilibrium position or the oscillation decays to zero (stops moving) very rapidly?
Thank you very much boneh3ad, it was very useful for me.
Thanks to Alephzero for pointing out what I was actually trying to ask. However the texts on Structural Dynamics (Anil K Chopra, UCB) do not start the way boneh3ad explained. I fell that is how it should be explianed which brings out...
How can you say so?Take a simple cantilever beam example with a mass at the free end.Then
ω=√k/m
k = 3EI / L^3
That does not give an imaginary Eigen value?
@ehild:I meant the part for finding the solution of SDOF (or a modal analysis of a multi degree of freedom) vibration problem.
@boneh3ad: if ω = √k/ m, where ω is the natural frequency and m the mass, suppose we get a real value for ω (say 1.1 or 3.0), what you mean by exponential here in...