Accession Number : ADA523921


Title :   Modeling of Residual Stress and Machining Distortion in Aerospace Components (PREPRINT)


Descriptive Note : Technical paper


Corporate Author : AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH MATERIALS AND MANUFACTURING DIRECTORATE


Personal Author(s) : Ma, Kong ; Goetz, Robert ; Srivatsa, Shesh K


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a523921.pdf


Report Date : Mar 2010


Pagination or Media Count : 43


Abstract : The insertion of new materials into aircraft systems takes several years and many millions of dollars. Experimental trials to define the manufacturing process to meet the specifications can add significant time and cost. Many military programs have small lot production in either initial engine development programs or specialized production, providing additional criticality to improving the First Time Yield (FTY) of manufacturing processes, and quickly resolving production issues. Additionally, the impact of an unintended process change is unknown without evaluating the component, again adding time and cost to issue resolution. Therefore, new approaches are required to facilitate the rapid certification of materials and processes technologies. Significant improvements in manufacturing processes have been realized by process modeling tools such as DEFORM(Trademark) and FORGE for metal forming and Procast(Trademark) for casting, which are now in routine industrial use.


Descriptors :   *MACHINING , *AEROSPACE SYSTEMS , *RESIDUAL STRESS , METAL FORMING PRESSES , CASTING , MATERIALS , SPECIFICATIONS


Subject Categories : Fabrication Metallurgy
      Mechanics
      Astronautics


Distribution Statement : APPROVED FOR PUBLIC RELEASE