13 June 2017 Experimental study on nonlinear vibrating of aluminum foam using electronic speckle pattern interferometry
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Proceedings Volume 10449, Fifth International Conference on Optical and Photonics Engineering; 104490Y (2017) https://doi.org/10.1117/12.2270397
Event: Fifth International Conference on Optical and Photonics Engineering, 2017, Singapore, Singapore
Abstract
Due to its multi properties, including excellent stiffness-to-weight and strength-to-weight ratios, closed-cell aluminum and its alloy foams become candidate materials for use in many high-technology industries, such as the automotive and aerospace industries. For the efficient use of closed-cell foams in structural applications, it is necessary and important to detailly understand their mechanical characteristics. In this paper, the nonlinear vibration responses of the cantilever beams of closed-cell aluminum foams were investigated by use of electronic speckle pattern interferometry (ESPI). The nonlinear resonant mode shapes of testing specimens under harmonic excitation were measured. It is first time to obtain from the experimental results that there exist super-harmonic responses when the cantilever beams of closed-cell aluminum foam were forced to vibrate, which was caused by its specific cellular structures.
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Fujun Yang, Fujun Yang, Yinhang Ma, Yinhang Ma, Nan Tao, Nan Tao, Xiaoyuan He, Xiaoyuan He, } "Experimental study on nonlinear vibrating of aluminum foam using electronic speckle pattern interferometry", Proc. SPIE 10449, Fifth International Conference on Optical and Photonics Engineering, 104490Y (13 June 2017); doi: 10.1117/12.2270397; https://doi.org/10.1117/12.2270397
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