Abstract
This paper discusses points of issue on static analysis of indeterminate contact forces raised by Omata. In summary, 1) Rigid-body-based analysis of static contact forces may have an advantage over elastic-contact-based analysis, which is physically more accurate, from an engineering viewpoint. 2) The elastic-contact-based method for contact force analysis by Rimon et al. is applicable only when preload contact forces are known and therefore it cannot always substitute for the conventional rigid-body model with Coulomb friction. 3) Virtual slidings and their combinations used in rigid-body-based analysis by the authors correspond to actual physical phenomena of contact forces.
