comsol cantilever beam problem

bhu47

Hello,

I have started working on COMSOL and doing simple problems. I have done a problem on cantilever beam with a point load on the tip. the data is given below.

beam dimensions: (8e-6, 1e-6, 1e-6) point on which load applies: (8e-6, 0.5e-6, 1e-6) load: 1e-5 in -z direction.

material properties isotropic material young's modulus: 170Gpa poisson's ratio: 0.25 thermal expansion coeff.: 8.5e-6 density: 2330 kg/m3

NO DAMPING condition. time steps are 0:1e-10:5e-7

beam is fixed on one end. i am in structural mechanics module, with transient analysis mode. i want to get 'z displacement Vs. time' plot. the plot i am getting is attached.

i want to know whether this plot is correct or wrong? as i am giving 'no damping', why my deflection stops after some time? shouldn't it be continuous like a sine wave as with no damping, it will behave like it is in space?Hello,

I have started working on COMSOL and doing simple problems. I have done a problem on cantilever beam with a point load on the tip. the data is given below.

beam dimensions: (8e-6, 1e-6, 1e-6) point on which load applies: (8e-6, 0.5e-6, 1e-6) load: 1e-5 in -z direction.

material properties isotropic material young's modulus: 170Gpa poisson's ratio: 0.25 thermal expansion coeff.: 8.5e-6 density: 2330 kg/m3

NO DAMPING condition. time steps are 0:1e-10:5e-7

beam is fixed on one end. i am in structural mechanics module, with transient analysis mode. i want to get 'z displacement Vs. time' plot.

i want to know the shape of the plot? in my plot, the deflection stops after some time. as i am giving 'no damping', why my deflection stops after some time? shouldn't it be continuous like a sine wave as with no damping, it will behave like it is in space?