Journal
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
Volume 61, Issue 10, Pages 1611-1620Publisher
SCIENCE PRESS
DOI: 10.1007/s11431-017-9194-2
Keywords
negative Poisson's ratio; auxetic; parametric design; load-displacement curve; jounce bumper
Funding
- Natural Science Foundation of Jiangsu Province [BK20170784]
- Aeronautical Science Foundation of China [2016ZA52003]
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A cylindrical negative Poisson's ratio (CNPR) structure based on two-dimensional double-arrow negative Poisson's ratio (NPR) structure was introduced in this paper. The CNPR structure has excellent stiffness, damping and energy absorption performances, and can be applied as spring, damper and energy absorbing components. In this study, the CNPR structure was used as a jounce bumper in vehicle suspension, and the load-displacement curve of NPR jounce bumper was discussed. Moreover, the influences of structural parameters and materials on the load-displacement curve of NPR jounce bumper were specifically researched. It came to the conclusion that only the numbers of cells and layers impact the hardening displacement of NPR jounce bumper. And all parameters significantly affect the structure stiffness at different displacement periods. On the other hand, the load-displacement curve of NPR jounce bumper should be in an ideal region which is difficult to be achieved applying mathematical optimization method. Therefore, a parametric design strategy of NPR jounce bumper was proposed according to the parametric analysis results. The design strategy had two main steps: design of hardening displacement and design of stiffness. The analysis results proved that the proposed method is reliable and is also meaningful for relevant structure design problem.
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