Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2. REPORT The AMIT program is an advanced research (6.3) program developed as a human performance enhancement for flightline maintenance technicians in the operational and warfighting environment.The need for AMIT was identified as critical to reducing persistent "Cannot Duplicate", "Re-test OK" and false removal patterns that have hampered maintenance performance and readiness and have increased operating costs.The significance of AMIT will be in researching the troubleshooting process and cognitive demands and decision points in order to identify the gaps where emerging science and technology could be applied to improve performance.
Public reporting burden for this collection of information is estimated to average 1 hour per response, Including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of Information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate AUTHOR(S)MAJ RANDELL CHRISTL\N E FUNDING NUMBERS PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)DELFT UNIVERSITY PERFORMING ORGANIZATION REPORT NUMBERCI02-1257 SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES) ABSTRACTFatigue crack growth in fibre metal laminates (FMLs) is significantly more complex than in monolithic materials due to the interaction of various physical mechanisms that govern the ZXof cracks in laminates. Extensive research has gone into the devek>pment of analytical SoSs that try to predict the growth of surface and through-cracks m the FML Glare under ZiZ loadiS To date, less emphasis has been placed on developmg fatigue crack growth moSfs for^ through cracks. These part-through cracks exhibit different rates of growth for Teh ay^r of^e lanlate based upon differing stress levels and delammation zone sizes. To TeSr Sedict the residual strength of FML structures, understandmg the behavior of subsurface crack SowS^ required. For tins reason, data of crack growth rates for layers of vanous lalaS: we corJpared to an analytical fatigue crack ^^^\-^f^'^^'^^i::^, cracks in a specific type of FML, Glare. This paper gives an mitial assessment of the model s veracity for subsurface crack growth.
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