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Title: Titanium cholla : lightweight, high-strength structures for aerospace applications.

Abstract

Aerospace designers seek lightweight, high-strength structures to lower launch weight while creating structures that are capable of withstanding launch loadings. Most 'light-weighting' is done through an expensive, time-consuming, iterative method requiring experience and a repeated design/test/redesign sequence until an adequate solution is obtained. Little successful work has been done in the application of generalized 3D optimization due to the difficulty of analytical solutions, the large computational requirements of computerized solutions, and the inability to manufacture many optimized structures with conventional machining processes. The Titanium Cholla LDRD team set out to create generalized 3D optimization routines, a set of analytically optimized 3D structures for testing the solutions, and a method of manufacturing these complex optimized structures. The team developed two new computer optimization solutions: Advanced Topological Optimization (ATO) and FlexFEM, an optimization package utilizing the eXtended Finite Element Method (XFEM) software for stress analysis. The team also developed several new analytically defined classes of optimized structures. Finally, the team developed a 3D capability for the Laser Engineered Net Shaping{trademark} (LENS{reg_sign}) additive manufacturing process including process planning for 3D optimized structures. This report gives individual examples as well as one generalized example showing the optimized solutions and an optimized metal part.

Authors:
; ;  [1]; ; ;  [1]
  1. University of Rhode Island, Kingston, RI
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
922082
Report Number(s):
SAND2007-6775
TRN: US200806%%50
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; SPACE VEHICLES; COMPUTER-AIDED DESIGN; FINITE ELEMENT METHOD; MACHINING; MANUFACTURING; STRESS ANALYSIS; Launch vehicles.; Engineering-Aerospace and Aeronautics; Stress analysis-Mathematical models.; Stress analysis-Computer programs.

Citation Formats

Atwood, Clinton J, Voth, Thomas Eugene, Taggart, David G, Gill, David Dennis, Robbins, Joshua H, and Dewhurst, Peter. Titanium cholla : lightweight, high-strength structures for aerospace applications.. United States: N. p., 2007. Web. doi:10.2172/922082.
Atwood, Clinton J, Voth, Thomas Eugene, Taggart, David G, Gill, David Dennis, Robbins, Joshua H, & Dewhurst, Peter. Titanium cholla : lightweight, high-strength structures for aerospace applications.. United States. doi:10.2172/922082.
Atwood, Clinton J, Voth, Thomas Eugene, Taggart, David G, Gill, David Dennis, Robbins, Joshua H, and Dewhurst, Peter. Mon . "Titanium cholla : lightweight, high-strength structures for aerospace applications.". United States. doi:10.2172/922082. https://www.osti.gov/servlets/purl/922082.
@article{osti_922082,
title = {Titanium cholla : lightweight, high-strength structures for aerospace applications.},
author = {Atwood, Clinton J and Voth, Thomas Eugene and Taggart, David G and Gill, David Dennis and Robbins, Joshua H and Dewhurst, Peter},
abstractNote = {Aerospace designers seek lightweight, high-strength structures to lower launch weight while creating structures that are capable of withstanding launch loadings. Most 'light-weighting' is done through an expensive, time-consuming, iterative method requiring experience and a repeated design/test/redesign sequence until an adequate solution is obtained. Little successful work has been done in the application of generalized 3D optimization due to the difficulty of analytical solutions, the large computational requirements of computerized solutions, and the inability to manufacture many optimized structures with conventional machining processes. The Titanium Cholla LDRD team set out to create generalized 3D optimization routines, a set of analytically optimized 3D structures for testing the solutions, and a method of manufacturing these complex optimized structures. The team developed two new computer optimization solutions: Advanced Topological Optimization (ATO) and FlexFEM, an optimization package utilizing the eXtended Finite Element Method (XFEM) software for stress analysis. The team also developed several new analytically defined classes of optimized structures. Finally, the team developed a 3D capability for the Laser Engineered Net Shaping{trademark} (LENS{reg_sign}) additive manufacturing process including process planning for 3D optimized structures. This report gives individual examples as well as one generalized example showing the optimized solutions and an optimized metal part.},
doi = {10.2172/922082},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {10}
}

Technical Report:

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