Nonlinear computer-aided tolerance analysis of mechanical assemblies using improved second-order method

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Sadikhani Omid; HASHEMIAN SEYED ALI

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Journal: Modares Mechanical Engineering Year:2018 | Volume:18 | Issue:5 Page(s): 192-201

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Information Journal Paper

Title

Nonlinear computer-aided tolerance analysis of mechanical assemblies using improved second-order method

Author(s)

Sadikhani Omid | HASHEMIAN SEYED ALI | Issue Writer Certificate

Keywords

Nonlinear tolerance analysisQ1

sensitivity analysisQ2

improved second-order methodQ1

statistical momentsQ1

Abstract

Tolerance analysis plays a crucial role in predicting the quality of products and reducing production costs. This procedure is generally complex and available methods for analyzing different types of assemblies are not always applicable. Accordingly, having a comprehensive approach to assess the effect of tolerances on the quality and cost of products is a fundamental requirement in the manufacturing industry. This paper proposes the improved second-order method for tolerance analysis of complex assemblies. The conventional second-order tolerance analysis (SOTA) is an accurate and applicable method for obtaining the statistical specifications of the assembly’ s key characteristic. However, determining the assembly function in SOTA entails forming vector loops and therefore, this method is limited to simple assemblies. On the other hand, in mechanical assemblies that are usually complex, creating vector loop may encounter some difficulties in practice. In this study, the mentioned issues have been overcome by linking SolidWorks and MATLAB software to employ the proposed methodology for any mechanical assemblies without creating vector loops. For this purpose, MATLAB software makes necessary changes in the SolidWorks model and calculates the derivatives of the assembly function, which are required for the analysis. Then, the statistical moments are computed and the probability distribution of the key characteristic is obtained using the Pearson system. The present study is appropriate for analyzing either linear or nonlinear assembly functions with any statistical distribution. Finally, the applicability of the proposed approach is investigated by some practical examples and the accuracy of results is confirmed by Monte Carlo simulation.

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APA: Copy

Sadikhani, Omid, & HASHEMIAN, SEYED ALI. (2018). Nonlinear computer-aided tolerance analysis of mechanical assemblies using improved second-order method. MODARES MECHANICAL ENGINEERING, 18(5 ), 192-201. SID. https://sid.ir/paper/178559/en

Vancouver: Copy

Sadikhani Omid, HASHEMIAN SEYED ALI. Nonlinear computer-aided tolerance analysis of mechanical assemblies using improved second-order method. MODARES MECHANICAL ENGINEERING[Internet]. 2018;18(5 ):192-201. Available from: https://sid.ir/paper/178559/en

IEEE: Copy

Omid Sadikhani, and SEYED ALI HASHEMIAN, “Nonlinear computer-aided tolerance analysis of mechanical assemblies using improved second-order method,” MODARES MECHANICAL ENGINEERING, vol. 18, no. 5 , pp. 192–201, 2018, [Online]. Available: https://sid.ir/paper/178559/en

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