General Mechanical

General Mechanical

What is the difference between rigid and flexible stiffness behaviour in the geometry properties?

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    • prakhars962
      Subscriber
    • 1shan
      Ansys Employee
      Hello Array,nWith a rigid definition the solver does not generate a mesh for that particular body(nor can you calculate stress/deformation results for that body) but rather only calculates kinematic variables (like velocity, position) as well as forces and moments across connections scoped to the body. It is mostly used in in multibody dynamic simulations where the primary interest is in calculating kinematic variables like velocities, accelerations, positions of different components rather than the stress/ deformations in each. If you are interested in calculating stresses inside only one component of a big assembly you could define that component as flexible and the rest as rigid. This would direct the solver to mesh and compute results for just 1 component rather than the whole assembly. You could check out the transient analysis of digger arm tutorial https://courses.ansys.com/index.php/courses/time-domain-dynamic-problems/lessons/homework-quizzes-simulation-examples-time-domain-dynamic-problems-lesson-6/and the related course.nRegards,nIshan.n
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