A Novel Model for the tolerancing of non-rigid part assemblies in CAD

[+] Author and Article Information
Mehdi Tlija

Avenue Ibn El Jazzar 5019 Monastir, Tunisia 5019 Tunisia tlija.mehdi@gmail.com

Anis Korbi

Avenue Ibn El Jazzar 5019 Monastir - Tunisie. Monastir, 5019 Tunisia anis.korbii@gmail.com

Borhen Louhichi

City Taffala - Ibn Khaldoun - Sousse 4003, Tunisia. LMS Sousse, 4003 Tunisia Borhen.Louhichi@etsmtl.ca

Abdelmajid Benamara

Avenue Ibn El Jazzar 5019 Monastir - Tunisie. Monastir, 5019 Tunisia benamara.dgrs@gmail.com

1Corresponding author.

Manuscript received September 4, 2018; final manuscript received April 3, 2019; published online xx xx, xxxx. Assoc. Editor: Yusheng Liu.

ASME doi:10.1115/1.4043528 History: Received September 04, 2018; Accepted April 03, 2019


In the design step, the realistic modelling of the product represents an industrial requirement and a Digital Muck up (DMU) improvement. Thus, the tolerance integration in the CAD model with the neglect of important physical factors, as the components deformations during the mounting and assembly operation, causes a deviation between the numerical and the realistic model. In this regard, this paper presents a new model for the tolerance analysis of CAD assemblies based on the consideration of both manufacturing defects and deformations. The dimensional and geometrical tolerances are considered by the determination of assemblies configurations with defects basing on the worst case tolerancing. The Finite Elements (FE) simulation is realized with realistic models. An algorithm for updating the realistic mating constraints, between rigid and non-rigid parts, is developed. The case study of an assembly with planar and cylindrical joints is presented.

Copyright © 2019 by ASME
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