ホログラフィ干渉法による弾性変位の面外成分測定

概要

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If the quantitative measurement of the out-of-plane component of elastic displacement in a plane stress model is possible, stress analysis in a full field can be achieved by adding photoelastic information from isochromatics. Even if the directions of collimated illumination and observation in holographic interferometry are normal to the diffusible surface of a strained body, one can not obtain isopachics, a fringe pattern showing lines of equi-thickness, because of the perspective effect. However, holographic interferometry based on image-plane holography in which both a telecentric optical system and collimated illumitation are used simultaneously, can yield isopachics and overcome the perspective effect. In very sensitive experiments such as those of holographic interferometry, however, due to lack of rigidity of the total loading system, translational and rotational movements of should be added and comes into fringe pattern inevitably. Consideration of experimentally obtained photographs and incorporated computer simulations enables estimation of the real extent of rigid displacement and evaluates the above deduction.
一般社団法人日本機械学会の論文
1996-06-25