To freely create an intentional force direction by freely combining generation of forces resulting from the difference between respective internal pressures of capsules and making use of contractive or expansive pressure generated in the inside of the material and caused by the difference of internal pressure.

The central layer is formed of a capsule 6 with 0 atm. and further, layers of capsules 5, 4, 3, 2 with respective 0.2, 0.4, 0.6, 0.8 atm. from the center toward the outside are arranged and bonded together to form a cylinder 1. When the capsules are made of a transparent material, as light is transmissible, the air in the capsules is heated and expanded to influence the whole quality. When the skin of the capsules is made of a material such as rubber, the whole deformation becomes large and hence actions such as a shape memory alloy or a bimetal can be utilized. When the atmospheric pressure is set lower as the capsules are positioned near the center, various directions of forces can be created in the quality of the cylinder itself. Accordingly, a dynamic directivity can be generated in the quality or the structural body inside.