Since wrinkle-texture can give different impressions and functions to a product, it has the important design role. The current method to design wrinkle-texture is to copy surface-patterns of natural objects such as leather and a pear. However, it is difficult to design various patterns that satisfy the sensibility of designers and customers because the copied wrinkles are limited in diversity. In addition, since designed wrinkle-texture sizes are small as compared to the target surface of a products, same patterns must be repeated to obtain a large wrinkle-texture area. For these problems, this study has developed three systems: a system to easily and promptly design wrinkle-textures based on KANSEI of designers and customers, a system to design wrinkle-textures by fusing wrinkle-textures having different impressions, and a system to design large size wrinkle-textures by comfortably connecting small size wrinkle-textures.

In recent years, additive manufacturing (AM) has been used in industrial products for fabricating complex geometry. On the other hand, topological optimization is a suitable method for designing complex geometry. Therefore, there are many studies of combining AM and topological optimization these days. As a variant of topological optimization, density optimization of lattice structure is recently studied. The lattice structure is a characteristic one that includes void inside structure fabricated by AM. The designed model by topological optimization should be modified for a suitable structure for AM process. This research tried to use lattice volume fraction optimization for an industrial AM product. Firstly, we have developed a method of designing the lattice unit cell that its effective thermal conductivity is controlled by design variables. Effective thermal conductivity of lattice is calculated by homogenization method and finite element method (FEM). It was confirmed that the effective thermal conductivity changes depending on the size of the internal pores. Next, we consider the minimization problem of the surface temperature of the target domain. By lattice volume fraction optimization, the uniformity of the surface temperature of the target domain was improved. In addition, we fabricated test pieces of lattice and 3D example model by using selective laser melting additive manufacturing. The results showed that the error between the measurement and the analysis using the test piece was sufficiently small.

When performing finite element analysis of mechanical devices, it is difficult to calculate including the linear motion guide because the analysis cost is huge. In this paper, two finite element analysis models considering the rigidity of the linear motion guide are proposed. One is an iterative calculation method that repeats the load distribution theory and FEM. The other is a direct calculation method using a non-linear spring that follows the rigidity obtained by load distribution analysis. As a result of verification experiments using a uniaxial table, it is confirmed that both analysis models can accurately predict the deformation of the table. In addition, the ratio of displacement derived from the linear motion guide is estimated from the comparison between the experiment and the analysis using the machining tools.

Distribution measurement of eyelid pressure is an important technology for diagnosis and treatment on corneal disorders, dry eyes etc. In the previous report, we have demonstrated the abrasive test of plane sucrose film samples, and experimentally evaluated thickness reduction characteristics of sucrose films. Although it showed sufficient potential of sucrose films for the distribution measurement of eyelid pressure, it was limited only to plane surface. In this study, we fabricated spherical lenses using melted sucrose with molding dies, and performed its abrasive test using a newly designed abrasive tester. The thickness reduction of sucrose lenses was evaluated by an image comparison of the lenses before and after the test. Experimental results proved the spherical sucrose films with the image comparison can be applied for the distribution measurement of eyelid pressure.