AAE552-Session2

AAE552-Session2 - AAE 552 Spring 2009 A. F. Grandt AAE 552:...

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AAE 552 Spring 2009 – A. F. Grandt 1 1 AAE 552: Nondestructive Evaluation of Structures and Materials A. F. Grandt, Jr. Professor of Aeronautics and Astronautics Purdue University W. Lafayette, IN 47907 Spring 2009 2 Contact Information Alten F. (Skip) Grandt, Jr. Email: [email protected] Telephone: Office: 765-494-5141 Home: 765-463-4276 FAX: 765-494-0307 Course webpage accessed at: http://www.itap.purdue.edu/tlt/blackboard 3 AAE 552 Session 2 14 January 2009 Last Time: Overview course goals/mechanics Introduction to nondestructive inspection Today: Damage tolerance and inspection Failure modes and inspection 4 AAE 552 Course Goals Goals: Overview methods for nondestructive inspection Discuss role of inspection in context of structural integrity What anomalies must be detected to prevent structural failure? What types of anomalies must be detected to indicate local failure has occurred? When must inspections be conducted? 5 Class Mechanics Course grade based on: 25% - Midterm examination (closed book, review sheet) – Session 29 (tentative) 30% - Comprehensive final exam (closed book, review sheet) 20% - paper #1 – review of research on new NDE method 25% - paper #2 – review of NDE application (Papers 1 and 2 to be posted on web page for peer review by class mates) 6 Assignment Please read textbook : Chapter 1 Chapter 2 (section 2.6) Chapter 4
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AAE 552 Spring 2009 – A. F. Grandt 2 7 A. F. (Skip) Grandt, Jr. Education (University of Illinois) BS General Engineering MS, PhD, Theoretical and Applied Mechanics Experience 1971-79, Materials Research Engineer, Air Force Materials Laboratory 1979-present, Purdue School of Aeronautics and Astronautics 1985-92, Head of School Teach AAE 204, 352, 454, 552, 554 10 Sonogram (Seth Liam Harbecke) 11 Fig. 12.23 Sonogram (Tessa Ruth Harbecke) 12 Sonogram of Fetus at 20 Weeks (Chloe Marie Harbecke) 13 Sonogram of Fetus at 25 Weeks (Caroline Rose Harbecke) 15 3 Legs of Stool Inspection (initial crack) Crack Growth (fatigue) Residual Strength (fracture) Structural Integrity is a “3-Legged” Stool Elapsed Cycles N Crack Growth Crack Length (a) Fracture Initial crack Goal
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3 16 NDE personnel must understand crack growth mechanics Crack growth analysts must understand NDE methods/limitations Inspection Must Work With Crack Growth Analysis to Insure Safety Residual Strength Crack Growth Inspection 17 Major Inspection Methods (the “Big 6”) Visual inspection Liquid penetrant Radiography Ultrasonic Eddy current Magnetic particles 18 Ch 10: Visual Inspection Visual detection of surface anomalies with the aid of lighting, mirrors, low power magnification Borescopes 19 Ch 10: Penetrant Inspection Penetration of colored liquid locates surface breaking anomalies 20 Remove penetrant Apply developer Blooming effect Clean surface Apply penetrant Dwell
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This note was uploaded on 11/04/2010 for the course AAE 552 taught by Professor Longuski during the Spring '10 term at IUPUI.

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AAE552-Session2 - AAE 552 Spring 2009 A. F. Grandt AAE 552:...

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