{"title":"Examining the Design Actions and Reasoning Factors that Impact Design Performance","authors":"Yakira Mirabito, K. Goucher-Lambert","doi":"10.1115/1.4064414","DOIUrl":"https://doi.org/10.1115/1.4064414","url":null,"abstract":"\u0000 Engineers often do not select the best designs available to them. This research investigates whether specific design actions improve performance in a design exploration task and whether the reasoning factors underpinning these actions can be inferred directly. This study quantitatively evaluates multiple dimensions of design behavior and cognition within concept selection using objective performance metrics. Fifty-six participants were tasked with identifying an optimal design for the gripping contact of a dishwashing robot. Results identified specific design actions that correlated with improved design performance, including exploring fewer design alternatives and isolating parameters. We found that reasoning factors stated by participants did not accurately map onto their observed actions and did not correlate with task performance. Implications related to future computational design support tools are discussed.","PeriodicalId":506672,"journal":{"name":"Journal of Mechanical Design","volume":"5 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139386565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and Analysis of Leaf Beam Single-Translation Constraint Compliant Modules and the Resulting Spherical Joints","authors":"Guangbo Hao, Xiuyun He, Jiaxiang Zhu, Haiyang Li","doi":"10.1115/1.4064415","DOIUrl":"https://doi.org/10.1115/1.4064415","url":null,"abstract":"\u0000 A wire beam is a single-translation constraint along its axial direction. It offers many applications in compliant mechanisms such as being a transmitting/decoupling element connected to a linear actuator, and being a fundamental constitutive element to design complex compliant joints and mechanisms. It is desired to find alternative leaf beam single-translation constraint to equal a wire beam, in order to improve the manufacturability and robustness to external loading. In this paper, we propose and model a new single-translation constraint compliant module, I-shape leaf beam design, to compare with a corresponding L-shape leaf beam design reported in the literature. Two spherical (S) joints using three I-shape leaf beams and three L-shape leaf beams, respectively, are then analytically modelled and analysed. Three key geometric parameters are adopted to thoroughly assess four performance indices of each S joint including stiffness ratio, rotation radius error, coupling motion and parasitic motion. It shows that the I-shape leaf beam based S joint performance indices are generally 10 times better than those of the L-shape leaf beam based S joint. For each S joint, the optimal parameters are found under the given conditions. Finally, experimental tests are carried out for a fabricated S joint prototype using the I-shape leaf beams, the results from which verify the accuracy of the proposed analytical model and the fabrication feasibility.","PeriodicalId":506672,"journal":{"name":"Journal of Mechanical Design","volume":"3 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139384693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Influence of Fixed Ring Gear Structural Compliance on the Quasi-Static and Dynamic Response of Epicyclic Gear Sets","authors":"L. Ryali, David Talbot","doi":"10.1115/1.4064412","DOIUrl":"https://doi.org/10.1115/1.4064412","url":null,"abstract":"\u0000 The structural compliance of annular ring gear can significantly influence the quasi-static and dynamic performance of an epicyclic gear set. As powertrain components are continually being optimized to their design limits, this influence becomes prominent and can no longer be ignored. The current paper will study the impact of ring gear compliance on the dynamic response of epicyclic gear sets, in fixed ring kinematic configuration. To achieve this objective the current study will incorporate a finite element based ring gear formulation into the three-dimensional planetary load distribution model of Ryali and Talbot [1]. The proposed model employs a modified simplex algorithm to iteratively solve for the elastic gear mesh contacts in conjunction with a numerical integration scheme, which enables it to inherently capture the influence of several component and system level design variations. The developed formulation is used to conduct parametric studies involving different planetary gear designs, ring gear fixtures (bolted vs. splined), and operating conditions (quasi-static, dynamic). In the case of a splined ring gear fixture, an external splined tooth contact model is developed, which will be used to validate the model against the quasi-static experiments of Ligata et al. [2]. The discussed results demonstrate the fidelity of the developed model, thus making it an excellent tool for the design and analysis of planetary gears with thin annular ring gears.","PeriodicalId":506672,"journal":{"name":"Journal of Mechanical Design","volume":"44 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139387025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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