Abstract: A tank includes: a first housing configured to include a first inner surface and a first peripheral edge projecting from the first inner surface; a second housing configured to include a second inner surface and a second peripheral edge, the second inner surface facing the first inner surface, the second peripheral edge projecting from the second inner surface and facing the first peripheral edge; and a sticky elastic body inside the first and second peripheral edge, wherein the first peripheral edge has a first inclined surface inclined from inside to outside from the first inner surface toward a first projecting end of the first peripheral edge, the second peripheral edge has a second inclined surface inclined from inside to outside from the second inner surface toward a second projecting end of the second peripheral edge, and the elastic body is stuck to the first and second inclined surface.

Abstract: A non-transitory computer-readable recording medium storing a distortion calculation program that causes a computer to execute a process includes: analyzing a distortion which occurs in an object when stress is applied, referring to a storage which stores a distortion amplitude for each of nodes of a mesh which is created for the object, moving, onto a circumference which is determined by a set radius, one or more nodes within a width set from the circumference by using a point selected from the nodes of the mesh as a starting point, creating a distribution chart of values of the distortion amplitude of the one or more nodes on the circumference after movement, and displaying the distribution chart on a display device.

Abstract: A tolerance analyzing apparatus for performing a tolerance analysis based on design data includes an assembly definition unit that allows a user to make an assembly definition and define a degree of freedom for a constituent component, and a determination unit determining a datum type corresponding to a count value based on a datum determination reference table. The determination unit obtains the count value by counting a number of normals having the same direction at an assembly location of the constituent component, a constrained degree of translational freedom in the normal direction, and a constrained degree of rotational freedom about an axis perpendicular to the normal based on the assembly definition and the degree of freedom of the constituent component. The apparatus also includes an output unit that outputs the datum type determined by the determination unit.

Abstract: An object interaction expression apparatus for expressing interactions between plural objects that move by simulation in a virtual space is provided. The apparatus includes an expression mode storing unit, an interaction magnitude calculating unit and an expression controller. The expression mode storing unit stores in a correlated form an interaction magnitude of an object and a corresponding expression mode in which the interaction magnitude will be expressed. The interaction magnitude calculating unit calculates interaction magnitudes of objects that interact with each other. The expression controller controls an expression of the interaction magnitude of the objects that interact with each other based on the expression modes stored corresponding to the interaction magnitude calculated.

Abstract: A CAD apparatus is used to design a three-dimensional model having at least one part made of a material which changes shape depending on assembling conditions. The CAD apparatus automatically obtains structural dimensions of the part in a deformed state after assembly, from structural dimensions of the part before the assembly, based on parameters including at least the assembling conditions. The CAD apparatus then creates the three-dimensional model using the structural dimensions of the part in the deformed state.

Abstract: A CAD apparatus is used to design a three-dimensional model having at least one part made of a material which changes shape depending on assembling conditions. The CAD apparatus automatically obtains structural dimensions of the part in a deformed state after assembly, from structural dimensions of the part before the assembly, based on parameters including at least the assembling conditions. The CAD apparatus then creates the three-dimensional model using the structural dimensions of the part in the deformed state.