National Taiwan University

Other

Ajeet Kumar

Jeng-Ywan Jeng

Chinmai Bhat

Saurav Verma

Yun-Peng Yeh

The metallic crystal structures inspired edge-to-edge tessellations and a tessellation based lattice structures are disclosed. In accordance with an exemplary embodiment of the invention, basic unit lattice cells are stacked and connected to constitute a three-dimensional tessellations, wherein each of the basic unit lattice cells comprises a multiple flat connecting portions formed on a surface of the basic unit lattice cell and intersecting with a multiple of axes intersecting in a center of the basic unit lattice cell, and the flat connecting portions of one of the basic unit lattice cell is connected to the flat connecting portions of the adjacent basic unit lattice cell to constitute a connection structure of edge-to-edge tessellation. The formed tessellations are periodically tessellated in a design domain to form different tessellated lattice structures. The Functionally Tessellated (FT) lattice structures composed of different tessellations by interlocking into each other are also disclosed.

Crystal structures inspired tessellations to generate multi-material properties in lattice structures with 3D printing

A invention disclosed a bio-mimicked three-dimensional laminated structure at least comprising a flexible lattice structure, which is characterized in that the flexible lattice structure comprises a plurality of particle units are uniformly disposed and evenly distributed in the X-axis, the Y-axis, and the Z-axis direction and evenly distributed as a lattice matrix of an array grid in an identical plane; wherein each of the particle units is an opened hollow shell or a close shell. The design eliminates the need for support structures and the subsequent post-processing required to remove them. A shell-shaped close cell bio-mimicked three-dimensional laminated structure bio-mimicking a sea urchin shape was introduced for the load-bearing structure application.

Bio-mimicked three-dimensional laminated structure

The proposed lattice structure is designed to simplify the time of long and difficult post-printing process of removing the unused powder or resin by blowing air in the additive manufacturing parts. The designed lattice structure is a ventilated three dimensional structure that includes a plurality of lattice bodies arranged in a first direction, a second direction and a third direction. The first direction, the second direction and the third direction are orthogonal. Each of the lattice body has a hollow structure formed by a shell wall including a first venting hole opening in the first direction and facing the first venting hole of another adjacent lattice body, a second venting hole opening in the second direction and facing the second venting hole of another adjacent lattice body; and a third venting hole opening in the third direction and facing the third venting hole of another adjacent lattice body.

Ventilated three dimensional structure from additive manufacture for easy powder removal during post process

The present invention relates to a shoe midsole structure and a method for manufacturing the same. The shoe midsole has unique hollow particle units that may be additively manufactured without any support structure. Each of the hollow particle units has a specific thickness and a hollow interior. A housing layer of each of the hollow particle units has a plurality of openings, a plurality of planar annular portions surrounding each of the openings, and a plurality of curved portions connecting adjacent planar annular portions. The plurality of openings are disposed in pair on the housing layer symmetrically with respect to the geometric centroid of the hollow particle units. A plurality of hollow particle units are arranged into a multi-laminate structure in the shoe midsole. Some hollow particle units are bent when a compression force or a shearing force is applied during use.

Growing community of inventors

Taipei, Taiwan

Ajeet Kumar