Accession Number : ADA622139


Title :   Cyber Enabled Direct Digital Manufacturing


Descriptive Note : Final rept. Jul 2011-Sep 2014


Corporate Author : PENNSYLVANIA STATE UNIV STATE COLLEGE APPLIED RESEARCH LAB


Personal Author(s) : Nassar, Abdalla R ; Reutzel, Edward W


Full Text : http://www.dtic.mil/dtic/tr/fulltext/u2/a622139.pdf


Report Date : 15 May 2015


Pagination or Media Count : 114


Abstract : Developments related to interfacing, sensing, and control of cyber-physical systems that occurred under the Office of Naval Research Cyber Enabled Direct Digital Manufacturing program, award N00014-11-1-0668 are discussed. Achievements include the development of a digital thread concept for AM. This concept advanced efforts towards a universal schema for communicating data relevant to AM processes. Taking advantage of the developed schema, direct interfacing of build-plan with finite element simulations was enabled. Additionally, sensing strategies were demonstrated, including optical emission spectroscopy for defect detection, and powder flow monitoring for flow anomaly detection. Real-time control of build plan was also demonstrated and found to significantly impact microstructure and mechanical properties of the deposited Ti-6AI-4V components. A final notable achievement is the invention of a novel method for deposition of directed-energy-deposited high-overhanging structures.


Descriptors :   *MANUFACTURING , CONTROL , EMISSION SPECTROSCOPY , MICROSTRUCTURE , OPTICAL PROPERTIES


Subject Categories : Mfg & Industrial Eng & Control of Product Sys


Distribution Statement : APPROVED FOR PUBLIC RELEASE