Posts tagged tests
Parmec spherical joint
- 13 June 2018
Torsion spring has now been added to PARMEC, allowing to model angular hinges with rotational limits and spherical joints. TORSION_SPRING command is used to define an angle–torque relationship for three angles of rotation about user specified local coordinate axes (x–roll, y–pitch, z–yaw). The command includes a cone constraint which allows to model spherical joints in roll-pitch, roll-yaw, and pitch-yaw planes. Example application application of this functionality is included as tests/spherical_joint.py. A ParaView animation generated by this test is included below. (…)
Parmec spring contact
- 23 May 2018
Parmec includes a simple spring contact modeling capability, where a contact plane on one particle can be paired up with a contact point on another particle. Both particles can be analytical (need no geometry), while the contact spring and dashpot curves are user defined. Friction, including sticking and slip, can also be added. An example test of this capability is tests/spring_contact_plane.py. Parmec SPRING command is used to define the entire contact interactions (parameters spring, dashpot and friction). Upon running it generates time history figures tests/spring_contact_plane_{z,f_ff}.png and output files viewable with ParaView. An animation and the figures are included below. (…)
Parmec spring curve tests
- 07 March 2018
Thanks to user feedback, Parmec begins to be smoothed out. An automated spring curve correctness test has now been added as tests/spring_curve_tests.py allowing to generate and run a number of simulations with random spring curves within a stroke-force box [-1, -1, 1, 1]. This test initiates what may become a suite of automated regression tests for Parmec. If matplotlib and imagemagic are installed, it generates a juxtaposed image, comparing input and output curves. An example image is included below. (…)