000			01562nam a22001935i 4500
999			_c56843 _d56843
008			190528s2019 dcu 000 0 eng
020			_z9780309480444
082			_a388.132 _bCON
100			_aConnor, Robert J. & Others _971893
245	1	0	_aAcceptance criteria of complete joint penetration steel bridge welds evaluated using enhanced ultrasonic methods
260			_aWashington, D. C. _bTransportation Research Board _c2019
300			_avii,75p.
490	0		_aNational cooperative highway research program, NCHRP research report _vNo. 908
505			_aCONTENTS 1 Sumary 4 Chapter 1 Background 4 1.1 Problem Statement and Research Objective 5 1.2 Scope of Study 5 1.3 Phased Array Ultrasonic Testing (PAUT) 8 Chapter 2 Research Approach 8 2.1 Summary of the State of the Practice 12 2.2 Research Methodology 14 Chapter 3 Findings and Application 14 3.1 Critical Flaw Size 24 3.2 Round Robin Results 33 3.3 CIVA Modeling 33 3.4 Acoustic Attenuation 39 3.5 Shear Wave Velocity 44 3.6 Calibration Blocks 46 3.7 Amplitude Limit for Rejection of Flaws 53 3.8 Amplitude Limit for Detection of Flaws 63 3.9 Compression Weld Acceptance Criteria 65 3.10 Comparison to Radiographic Testing : I 65 3.11 Technician Performance Qualification 69 3.12 Flaw Sizing Acceptance Criteria for Alternative UT Methods 72 Chapter 4 Conclus ions and Suggested Research 72 4.1 Conclusions 72 4.2 Suggested Research 74 References
600			_950406
890			_aUSA
891			_aGRATIS _aCEPT-COE-UTPM
942			_2ddc