Tolerance analysis of hyperstatic mechanical systems with deformations

Pierre, Laurent; Rouetbi, Oussama; Anselmetti, Bernard

doi:10.1016/j.procir.2018.04.059

Cited by 6 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, the consideration of the combined effects of deformations and manufacturing defects in the CAD environment overcomes the limitations of the methods previously cited. [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] The runtime of the developed decision aided tool depends significantly on the number of components and initial specifications. Nevertheless, the current state of affairs in this research field and the works so far seem very promising and may serve as an impulse for abundant discussions in research and industry.…”

Section: Discussionmentioning

confidence: 99%

“…Pierre at al. 18 established a tolerance analysis model for hyperstatic mechanisms that considers the maximum and the minimum of material conditions of parts with defects as well as deformations dues to the mechanical joints forces. Zhang et al 19 developed a method for the tolerance analysis of annular surfaces considering form defects and local surface deformations dues to external loads.…”

Section: State Of the Artmentioning

confidence: 99%

“…The approaches proposed in Refs. [11][12][13][14][15][16][17][18][19][20][21][22] overcome the limitations of the above tolerancing methods by taking into account the deformations of non-rigid components. Most of these methods [11][12][13][14] can be applied just in the case of sheets metal assemblies and are not valid for thick parts.…”

Section: State Of the Artmentioning

confidence: 99%

“…Most of these methods [11][12][13][14] can be applied just in the case of sheets metal assemblies and are not valid for thick parts. The rest of models [15][16][17][18][19][20][21][22] are focused on the use of mathematical formulations, statistical tools and the FE computations without a realistic geometric modeling of assembly components on the CAD software. Thus, this paper proposes a new CAD method for the consideration of manufacturing defects and deformations of non-rigid parts during the tolerance analysis of CAD assemblies.…”

Section: State Of the Artmentioning

confidence: 99%

See 3 more Smart Citations

A CAD model for the tolerancing of mechanical assemblies considering non-rigid joints between parts with defects

Korbi

Tlija

Louhichi

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

During the design stage, the ideal simulation and visualization of the mechanical assemblies behavior require the modeling of parts with dimensional and geometrical defects. However, the deviations caused by parts deformations can generate an important difference between the ideal assembly and the real product. In this regard, this paper proposes a tolerance analysis method of CAD assemblies considering non-rigid joints between parts with defects. The determination of realistic rigid components with dimensional and geometrical defects is based on the worst case tolerancing approach and the Small Displacement Torsor (SDT) parameters. The Finite Element (FE) computation is executed to determine deformations of realistic non-rigid part models under external loads. Sub-algorithms to define non-rigid joints between realistic parts are developed. The tolerance analysis is established using the realistic CAD assembly. A case study is presented to evaluate the proposed model.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

Section: State Of the Artmentioning

confidence: 99%

See 2 more Smart Citations

A CAD model for the tolerancing of mechanical assemblies considering non-rigid joints between parts with defects

Korbi

Tlija

Louhichi

2021

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

show abstract

“…Pierre et al [30] used the Least Material Requirement (LMR) in tolerancing, which enables the acceptance of parts by compensating the different deviations allowed by tolerance zones and clearances. For flexible mechanisms, Pierre et al [31] proposed a different approach that takes into account the deformation of the part in the tolerance analysis. A modelling based on the mechanical behavior is integrated into the calculation of the dimensional chains of the studied part.…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Synthesis of Manufacturing Tolerances Based on Analysis Using the Ascending Approach

et al. 2022

View full text Add to dashboard Cite

The present paper develops a new approach for manufacturing tolerances synthesis to allow the distribution of these tolerances over the different phases concerned in machining processes using relationships written in the tolerance analysis phase that have been well developed in our previous works. The novelty of the proposed approach is that the treatment of non-conventional surfaces does not pose a particular problem, since the toleranced surface is discretized. Thus, it is possible to study the feasibility of a single critical requirement as an example. During the present approach, we only look for variables that influence the requirements and the others are noted F (Free). These variables can be perfectly identified on the machine, which can be applied for known and unknown machining fixtures; this can be the base for proposing a normalized ISO specification used in the different machining phases of a mechanical part. The synthesis of machining tolerances takes place in three steps: (1) Analysis of the relationship’s terms, which include the influence of three main defects; the deviation on the machined surface, defects in the machining set-up, and the influence of positioning dispersions; then (2) optimization of machining tolerance through a precise evaluation of these effects; and finally (3) the optimization of the precision of the workpiece fixture, which will give the dimensioning of the machining assembly for the tooling and will allow the machining assembly to be qualified. The approach used proved its efficiency in the end by presenting the optimal machining process drawing that explains the ordered phases needed to process the workpiece object of the case study.

show abstract

Laser-based, non-invasive monitoring and exponential analysis of the mechanical behaviour of materials with structural inhomogeneities in heat transfer, towards thermal equilibrium

2022

View full text Add to dashboard Cite

Tolerance analysis of hyperstatic mechanical systems with deformations

Cited by 6 publications

References 14 publications

A CAD model for the tolerancing of mechanical assemblies considering non-rigid joints between parts with defects

A CAD model for the tolerancing of mechanical assemblies considering non-rigid joints between parts with defects

Three-Dimensional Synthesis of Manufacturing Tolerances Based on Analysis Using the Ascending Approach

Laser-based, non-invasive monitoring and exponential analysis of the mechanical behaviour of materials with structural inhomogeneities in heat transfer, towards thermal equilibrium

Contact Info

Product

Resources

About