The effect of contact interface on dynamic characteristics of composite structures

13 years 4 months ago

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In this project, nonlinear characteristics on the rolling interface of a linear guide were studied by the ﬁnite element analysis and experimental veriﬁcation. Contact of the ball/surface rolling interface in the rolling guides was simulated as a three-dimensional membrane element without thickness. By introducing Hertzian contact theory and applying proper normal/shear stiffness to such contact elements in the overall ﬁnite element model, dynamic behaviors of linear guides affected by preload were thus investigated. In the ﬁnite element procedure, three contact models, 1D point-to-point, 2D point-to-point and 3D surface-to-surface, were sequentially introduced for purpose of veriﬁcation with experiments. As a validation in this project, vibrational experiments on linear guides with different preloads were conducted and related frequency spectrums were derived. Both the ﬁnite element and the experimental results reveal that the natural frequency of a linear guide increases ...

James Shih-Shyn Wu, Jyh-Cheng Chang, Jui-Pin Hung

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