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The Poynting effect may refer to two unrelated physical phenomena. Neither should be confused with the Poynting–Robertson effect. All of these effects are named after John Henry Poynting, an English physicist. == Solid Mechanics == In solid mechanics, the Poynting effect is a large strain effect observed when an elastic cube is sheared between two plates and stress is developed in the direction normal to the sheared faces, or when a cylinder is subjected to torsion and the axial length changes.〔C. A. Truesdell, A programme of physical research in classical mechanics, Zeitschrift f¨ur Angewandte Mathematik und Physik 3 (1952) 79-95.〕〔P. A. Janmey, M. E. McCormick, S. Rammensee, J. L. Leight, P. C. Georges, and F. C. MacKintosh, (Negative normal stress in semiflexible biopolymer gels ), Nature Materials 6 (2006) 48-51.〕〔L. A. Mihai and A. Goriely, (Positive or negative Poynting effect? The role of adscititious inequalities in hyperelastic materials ), Proceedings of the Royal Society A 467 (2011) 3633-3646.〕〔L. A. Mihai and A. Goriely, (Numerical simulation of shear and the Poynting effects by the finite element method: An application of the generalised empirical inequalities in nonlinear elasticity ), International Journal of Non-Linear Mechanics 49 (2013) 1-14.〕 The Poynting phenomenon in torsion was noticed experimentally by J. H. Poynting.〔J. H. Poynting, Radiation-pressure, Philosophical Magazine 9 (1905) 393-406.〕〔J. H. Poynting, (On pressure perpendicular to the shear-planes in finite pure shears, and on the lengthening of loaded wires when twisted ), Proceedings of the Royal Society A 82 (1909) 546-559.〕〔J. H. Poynting, The changes in length and volume of an Indian-rubber cord when twisted, India-Rubber Journal, October 4 (1913) p. 6.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Poynting effect」の詳細全文を読む スポンサード リンク
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