Lattice transitioning structures in additively manufactured products

A method for generating a lattice structure, comprising:

• generating a first three-dimensional lattice comprising a first repeating interconnected array of a first lattice unit cell;
• generating a second three-dimensional lattice comprising a first repeating interconnected array of a second lattice unit cell, wherein the second lattice unit cell is different from the first lattice unit cell;
• and
• generating a transition segment interconnecting the first three-dimensional lattice and the second three-dimensional lattice, wherein the transition segment comprises a first three-dimensional transitional lattice comprising a second repeating array of the first lattice unit cell, and, interleaved with and interconnected to the first three-dimensional transitional lattice, a second three-dimensional transitional lattice comprising a second repeating array of the second lattice unit cell,
• wherein:
• the transition segment has a first portion connected to the first three-dimensional lattice and a second portion connected to the second three-dimensional lattice;
• the first lattice unit cells of the first three-dimensional transitional lattice progressively contract in size from the first portion to the second portion;
• and
• the second lattice unit cells of the second three-dimensional transitional lattice progressively expand in size from the first portion to the second portion.

A computer program product comprising:

• a tangible non-transitory computer readable storage medium comprising computer readable program code embodied in the computer readable storage medium that when executed by at least one processor causes the at least one processor to perform operations comprising:
• generating a first three-dimensional lattice comprising a first repeating interconnected array of a first lattice unit cell;
• generating a second three-dimensional lattice comprising a first repeating interconnected array of a second lattice unit cell, wherein the second lattice unit cell is different from the first lattice unit cell;
• and
• generating a transition segment interconnecting the first three-dimensional lattice and the second three-dimensional lattice, wherein the transition segment comprises a first three-dimensional transitional lattice comprising a second repeating array of the first lattice unit cell, and, interleaved with and interconnected to the first three-dimensional transitional lattice, a second three-dimensional transitional lattice comprising a second repeating array of the second lattice unit cell,
• wherein:
• the transition segment has a first portion connected to the first three-dimensional lattice and a second portion connected to the second three-dimensional lattice;
• the first lattice unit cells of the first three-dimensional transitional lattice progressively contract in size from the first portion to the second portion;
• and
• the second lattice unit cells of the second three-dimensional transitional lattice progressively expand in size from the first portion to the second portion.