AToPAd : Tolerance Analysis by Adaptative Polyhedra

Project summary

• Simulation of the geometric variabilities of over constrained mechanical systems.
• Integration of dimensional and geometric specifications (form, orientation and position).
• Taking local deformations into account: coupling into purely geometric and mechanical constitutive laws.
• Development of the digital twin of mechanical assemblies

Obtaining a realistic simulations of the behavior of the assemblies

• At the part level, integration of the representative geometric details of the production processes.
• At the mechanism level, integration of a contact architecture coupled with a behavior representative of the functioning of a mechanical system. 

At the part scale, the integration of shape defects drastically increases the complexity of contact modeling. This leads tolerance analysis tools to make assumptions that limit the type of part variations while specializing the types of architecture (isostatic or hyperstatic), integrating (or not) the mobility of the mechanism, addressing (or not) local deformations of contact surfaces and part stiffness. Due to the complexity of the physical phenomena to address, it is necessary to rethink and develop an adaptive acuity of the system modeling in relation to the functional requirements to be met.

Project description on the ANR website

Partners and funders

Project coordinator : Denis Teissandier (I2M)

• I2M : Institut de mécanique et d'ingénierie de bordeaux
• LURPA : Laboratoire universitaire de recherche en production automatisée
• ANR : Agence nationale de la recherche