Journal or Book Title
Applied Physics Letters
We present a method for evaluating internal dynamic stresses in a solid vibrating body from measurements of surface motion. The method relies on the same mathematics as boundary element method: A boundary reciprocity integral represents interior motion as a surface integral of boundary motion times the Green’s function. The surface motions are measured with a laser vibrometer rather than simulated, giving a direct measurement of internal motions and internal dynamic stresses. Experimental results on a flexing beam demonstrate that stresses measured in this fashion match those calculated from elementary theory.
Copyright 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
American Institute of Physics
Holland, Stephen D.; Renshaw, Jeremy Blake; and Roberts, Ronald A., "Measurement of dynamic full-field internal stresses through surface laser Doppler vibrometry" (2007). Aerospace Engineering Publications. 2.