公开(公告)号：US20180273438A1

公开(公告)日：2018-09-27

申请号：US15466893

申请日：2017-03-23

申请人： U.S. Army Research Laboratory ATTN: RDRL-LOC-I

发明人： Paul J. Conroy ,  Raymond A. Wildman ,  Eric J. Robinette ,  John R. Schmidt ,  Andrew T. Gaynor

IPC分类号： C06B21/00 ,  C06B45/00

CPC分类号： C06B21/0033 ,  C06B45/00

摘要： A method of manufacturing and optimizing energetic propellant grains includes generating an optimal surface area to mass fraction burned ratio profile for a predetermined solid structure including propellant grains; using the profile as a target function of a topological optimization process to generate a 3D form of a propellant grain; developing a negative of the 3D form of the propellant grain; mixing and densifying the negative with an energetic material in an uncured form in a mixer to create a structure including the energetic material and embedded negative; and solvating the negative from the structure, wherein the negative comprises a 3D propellant grain. The developing of the negative of the 3D form of the propellant grain may occur using a predetermined material in an additive manufacturing process. The negative may be soluble in the predetermined material, and the energetic material may be insoluble in the predetermined material.

公开(公告)号：US10906848B2

公开(公告)日：2021-02-02

申请号：US15466893

申请日：2017-03-23

申请人： U.S. Army Research Laboratory ATTN: RDRL-LOC-I

发明人： Paul J. Conroy ,  Raymond A. Wildman ,  Eric J. Robinette ,  John R. Schmidt ,  Andrew T. Gaynor

IPC分类号： C06B21/00 ,  C06B45/00

摘要： A method of manufacturing and optimizing energetic propellant grains includes generating an optimal surface area to mass fraction burned ratio profile for a predetermined solid structure including propellant grains; using the profile as a target function of a topological optimization process to generate a 3D form of a propellant grain; developing a negative of the 3D form of the propellant grain; mixing and densifying the negative with an energetic material in an uncured form in a mixer to create a structure including the energetic material and embedded negative; and solvating the negative from the structure, wherein the negative comprises a 3D propellant grain. The developing of the negative of the 3D form of the propellant grain may occur using a predetermined material in an additive manufacturing process. The negative may be soluble in the predetermined material, and the energetic material may be insoluble in the predetermined material.