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The Development and Use of a Torsional Split Hopkinson Bar for Experiments in Dynamic Plasticity
Report Number: AFML TR 71-32
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Publication Date: 5/1/1971
Project: 0
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AD Number: AD0726998
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Effect of Strain Rate, Temperature and Multiaxial Stress on the Strength and Ductility of S-200E Beryllium and 6Al-4V Titanium
Report Number: AFML TR 71-37
Author(s):
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Publication Date: 3/1/1971
Project: 0
Task: 0
AD Number: AD0884041
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Study of Deformation and Defects Occurrence in Advanced Forging Technique
Report Number: AFML TR 71-69
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Publication Date: 9/1/1971
Project: 0
Task: 0
AD Number: AD0740887
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Failure Mechanism of Attitude Control System Valve in Chlorine Pentafluoride Service
Report Number: AFML TR 71-94
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Publication Date: 7/1/1971
Project: 0
Task: 0
AD Number: AD0729874
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Comparison of Major Forging Systems
Report Number: AFML TR 71-112
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Publication Date: 5/1/1971
Project: 0
Task: 0
AD Number: AD0887384
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New Techniques in Nondestructive Testing (Exo-Electron Emission Phase). Part I.
Report Number: AFML TR 71-140
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Publication Date: 12/1/1971
Project: 0
Task: 0
AD Number: AD0748272
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AFML Torsional Split Hopkinson Bar
Report Number: AFML TR 71-145
Author(s):
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Publication Date: 7/1/1971
Project: 0
Task: 0
AD Number: AD0729880
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Development of a High Speed Biaxial Testing Machine
Report Number: AFML TR 71-149
Author(s):
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Publication Date: 7/1/1971
Project: 0
Task: 0
AD Number: AD0731823
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Analytical Study of the Split Hopkinson Bar Technique for Strain-Rate Dependent Material Behavior
Report Number: AFML TR 71-155
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Publication Date: 8/1/1971
Project: 0
Task: 0
AD Number: AD0732196
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Development and Applications of Nondestructive Methods for Predicting Mechanical Properties of Advanced Reinforced Nonmetallic Composites.
Report Number: AFML TR 71-168
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Publication Date: 9/1/1971
Project: 0
Task: 0
AD Number: AD0752251
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Fatigue Behavior of Thin Solid Films Induced by a Moving Surface Load
Report Number: AFML TR 71-171
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Publication Date: 2/1/1972
Project: 0
Task: 0
AD Number: AD0753411
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Fine Subgrain Structure Adjacent to Fatigue Cracks
Report Number: AFML TR 71-211
Author(s):
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Publication Date: 10/1/1971
Project: 0
Task: 0
AD Number: AD0733719
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Development of a Nondestructive Testing Technique to Determine Flaw Criticality
Report Number: AFML TR 71-218
Author(s): C. E. Hartbower; C. F. Morais; W. G. Reuter, et al
Corporate Author: Aerojet Solid Propulsion Company
Laboratory: Air Force Materials Laboratory
Publication Date: 1/1/1972
Pages: 240
Features: + Foldout(s)
Contract: F33615-68-C-1705
Project: None Given
Task: None Given
AD Number: AD0747225
Photo Enhancement: Complete
Abstract Text:
The report presents the findings of a study to develop a nondestructive testing technique to determine flaw criticality based upon stress-wave emission. The research included an evaluation of various sensors and instrumentation systems, and several materials and material conditions tested to failure in rising load and low-cycle, high-stress-intensity fatigue. The fracture testing utilized a linear-elastic fracture-mechanics approach. Acoustic emission was the basis of the nondestructive inspection technique. The stress-wave-analysis technique (SWAT) was shown to be a highly sensitive nondestructive inspection method, capable of detecting growing defects at least an order of magnitude smaller than any other known NDI method and, with a computerized system, capable of locating one or more defects in real time.
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