Abstract
In an elastic body under stress, it is important to know the place where a singular point or, more particularly, an isotropic point is present and the type of such isotropic point, for design of machines and structures, from the theoretical aspect of dynamics that the isotropic point is a dynamically stable place. However, it is difficult to know where the isotropic point is present because it often appears irregularly at an unexpected place.
The author previously reported the following two points as examples of the property of the isotropic point or the study that the isotropic point in an elastic body under a stress condition presents the following properties depending on the form and the load condition of the elastic body.
The one is the movement of isotropic point. This is the property that an isotropic point present at a certain place in an elastic body under a stress condition moves along a certain locus under a certain condition. The other property is the disappearance of isotropic point. This is the property that an isotropic point present at certain place in an elastic body under a stress condition disappears under a certain condition or, conversely, an isotropic point comes to appear at a certain place where there was no isotropic point was present.
In the present report, the result of study of the former property of isotropic point is presented with respect to an isotropic point in a strip with a circular hole as an example of movement of isotropic point.
