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Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/6626
Title: Design of shock table tests to mimic real-life drop conditions
Authors: Zhou, Chunyan
Yu, Tong-Xi
Suhir, E.
Keywords: Acceleration
Drop test
Dynamic response
Impact force pulse
Portable electronics
Shock test
Issue Date: 30-Oct-2009
Citation: IEEE transactions on components and packaging technologies, v. 32, no. 4, December 2009, v. 832-837
Abstract: A systematic study, both experimentally and analytically, is conducted to evaluate the feasibility of using appropriate shock table tests to mimic the drop impact environment for components and systems adopted in portable electronics. Firstly, experiments are carried out to observe the dynamic characteristics of typical portable electronic systems and components under drop impact. Then a series of shock table tests with different constraint conditions are designed to mimic the real-life impact state. By comparing the typical results from shock table tests and those from drop tests, the correlation of shock table test parameters and drop tests conditions is investigated. The results reveal that the conventional fully constrained shock table test cannot mimic the real-life drop impact conditions, while an appropriate shock table test method should allow the sample to rotate freely. Theoretical analysis is developed to explain the mechanics of the impact scenarios. It is found that due to Hertz contact spring effect and the rotational acceleration during the impact, the acceleration of the centroid sample is significantly different to that of the table. In addition, acceleration estimated by traditional force-divided-by-mass method may underestimate the real acceleration of components inside the products.
Rights: © 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
URI: http://hdl.handle.net/1783.1/6626
Appears in Collections:MECH Journal/Magazine Articles

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