Question #218111 on Yade changed: https://answers.launchpad.net/yade/+question/218111
Jan Stránský proposed the following answer: Where does this script come from? Anyway let me explain how Yade works in this script and why the results are correct: O.materials.append(FrictMat(young=3e8,poisson=0.3,frictionAngle=radians(20),density=2600,label='spheres')) > material with density=2600 is created > c0=utils.sphere([0,0,0],.5,material='spheres') > body with material 'spheres' is created. At this moment, mass of the particle is computed from density (2600) and its volume > O.bodies[0].material.density=260000 > now you set density of the material to 260000, but actual particle's mass remains unchanged. If you created new particle of the same size with material 'spheres', it would have different mass than the original particle c0 > O.dt=utils.PWaveTimeStep() > PWaveTimeStep computes time step from particles' mass, not their material densities. That's why changing material.density has no effect. If you do c0.state.mass *= 100 than the time step computed with PWaveTimeStep would be different. cheers Jan -- You received this question notification because you are a member of yade-users, which is an answer contact for Yade. _______________________________________________ Mailing list: https://launchpad.net/~yade-users Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-users More help : https://help.launchpad.net/ListHelp
