- Email: [email protected]
AE testing of a low-alloy steel pressure vessel
- N D T abstracts A b s t r a c t s a r e c o m p i l e d by A E A T e c h n o l o g y N a t i o n a l N D T C e n t r e , H a r w e l l , O x o n , O X 1 1 0 R A , U K . T h e e n t r i e s are d r a w n f r o m o v e r 500 British a n d I n t e r n a t i o n a l p u b l i c a t i o n s . E a c h issue c o n c e n t r a t e s o n o n e o r t w o s u b j e c t areas. NDT
T h e s u b j e c t s c o v e r e d in p r e v i o u s issues f r o m F e b r u a r y 1993 o n w a r d s a r e : A c o u s t i c and u l t r a s o n i c m e a s u r e m e n t o f elastic c o n s t a n t s - 27(1); A c o u s t i c e m i s s i o n testing o f pressure vessels - 26(6); M a g n e t i c flux l e a k a g e - 26(1); N D T in r a i l w a y s - 26(4); N D T using b a c k s c a t t e r o f u l t r a s o u n d - 26(5); S y n t h e t i c a p e r t u r e signal p r o c e s s i n g - 26(3); T h e r m o g r a p h y o f c o m p o s i t e s - 26(2); U l t r a s o n i c N D E o f a i r c r a f t - 27(3); X - r a y t o m o g r a p h y - 27(2)
Condition monitoring using acoustic and thermal techniques 55246 Sutherland, H.I.; Musial, W. Application of nondestructive techniques to the testing of a wind turbine blade Sandia National Labs., Alburquerque, New Mexico (United States), DE93016731/GAR, 8pp. (1993) This paper reports on the use of two NDT techniques to monitor the behavior of a typical wind turbine blade during a quasi-static test-to- failure. The test used a three-point spanwise load distribution to load a 7.9-m blade to failure. The two NDT techniques used were acoustic emission and coherent optical. Typical results are presented to demonstrate the ability of these two techniques to locate and monitor both high damage regions and flaws in the blade structure. 55244 Guang, Dai; Li, Wang Ya; Ting, Xu Yang ; Zhang, Bao Qi A E testing of a low-alloy steel pressure vessel NDT & E International, Vol. 26, No. 6, pp. 291-297 (Dec. 1993) Testing pressure vessels in the field is generally conducted within a given range of test procedures, determined beforehand according to specified criteria. Thus monitoring of flaw growth using AE is carried out under restricted conditions. To study the AE activity of flaws in welded seams of a pressure vessel (made of low-alloy steel) at different stages of growth and at different strains, tests were conducted on both spherical and cylindrical pressure vessels containing different artificial flaws. For given test conditions, the relationships between AE activity of artificial flaws and measured strains were studied. These tests form an important basis for the testing and assessment of engineering pressure vessels in the fiield. 55223 Schreyer, J.; Jackel, G. Nondestructive testing of tunnel linings. Development of a nondestructive method for assessment of the condition of outer tunuellings (in G e r m a n ) Studiengesellschaft fuer Unterirdische Verkehrsaniagen e.V., Cologne (Germany), TIBIA93-O24791GAR, 143pp. (Jun 1991) The study gives an overview on nondestructive testing methods for the evaluation of the state of traffic tunnel linings and selected test methods have been checked in the laboratory scale. Most promising methods are based on the thermographic, georader and multispectral analyses and their combinations. 55000 Bicknell, A.; Smith, J.S.; Lucas, J. I n f r a r e d sensor for top face monitoring for weld pools Measurement Science and Technology, Vol. 5, No. 4, pp. 371-378 (Apr. 1994) The development of a novel sensor for the measurement of bead size in tungsten inert gas (TIG) welds is described. A passive vision-based sensor combines infrared imaging of the weld pool and selective optical filtering, both to reduce excessive arc glare and improve contrast between weld pool and heat affected zone (HAZ). The arc interruption and external illumination techniques, used by others, are not required. Image quality is shown to be comparable to that obtained with external illumination and superior to that of arch interruption methods. The technique has been successfully applied to both pulsed and continuous TIG welding of stainless steel in order to maintain the bead size during a welding run. 54845 McBride, S.; Hong, Y.; Pollard, M. Enhanced fatigue crack detection in aging aircraft using continuous acoustic emission monitoring Review of Progress in Quantitative Nondestructive Evaluation, La Jolla, California (United States), 19-24 Jul. 1992. Voi. 12B, pp. 2191-2197 Edited by D.O. Thompson and D.E. Chimenti. Plenum Press (1993) ISBN 0- 306 A,4~83-6 This work will describe the use of acoustic emission to detect fatigue
cracks in a full-scaleaircraftstructureduring ground durabilityand damage
tolerance testing. Data is presented for about 3,000 equivalent flying hours of continuous monitoring and describes our progress during the past two years. Attention is focused here on the relative effectiveness of periodic acoustic emission testing and continuous acoustic emission monitoring. Comparison of the acoustic emission results with those of conventional NDI are made. 54278 Ouellette, P.; Hoa, S.V. Acoustic emission signal trends during high cycle fatigue of FRP/balsa wood core vessels Journal of Acoustic Emission, Vol. 11, No. 2, pp. 65-70 (Apr.-Jun. 1993) Experimental results from acoustic emission tests on two fiber reinforced plastic/balsa wood core vessels that have been subjected to long cycle fatigue loading are presented. These results together with results obtained from short term cyclic tests on twenty one other fiber reinforced plastic vessels provide substantial supporting evidence for a Recommended Practice for Acoustic Emission Monitoring of Fiber Reinforced Plastic with Balsa Wood Core Highway Tankers. 54093 Pellionisz, P.; Jha, S.K.; Goswami, G.L. Acoustic emission experiments for P H W R
technology
development
Central Research Institute for Physics, Budapest (Hungary), KFFI-1992- 19/G,I, 16 pp. (1992) The aim was to check the method's capability for leakage detection and shuttle movement monitoring at Pressurized Heavy Water Reactors (PHWR) as well as its applicability in monitoring at Pressurized Heavy Reactors (PHWR) as well as its applicability in monitoring manufacturing processes such as laser welding. In this paper the measurements are shortly described and results presented. 53841 Kulowitch, P.I. Development of an inertially-loaded test fixture for in-flight evaluation of an acoustic emission monitoring system Navel Air Development Center, Warminster, Pennsylvania (United States), AD-A260 940/2/GAR, 47 pp. (Jul. 1991) An inertially-loaded test fixture was designed for use with an in- flight acoustic emission monitoring system. The fixture provides a controlled method of simulating structural cracking during flight. It will be used to determine if acoustic emission monitoring is a viable method for monitoring crack growth in aircraft structures which are difficult to access and inspect. 53828
Lenain, J.-C.
R e w i e w o f the applicants of acoustic emission in industry
Revue Pratique de Controle Industriel, Suppl. No. 182, pp. 24-27 (Oct. 1993) This paper show several examples of applications: pressure vessels, spheres, storage tank,.., and so gives an idea about the database available. Also Ae is used as a condition monitoring method (corrosion, leak,...) of storage tank bottom. New developments have been made for testing the aircraft structures such fuselage, wing.., to answer the ageing problem. 53588 Hamstad, M.A.; Sendeckyj, G.P. Acoustic emission technology for smart structures Journal of Acoustic Emission, Vol. I 1, No. 1, pp. 33-41 (Jan.-Mar. 1993) Acoustic emission technology is reviewed for potential applications to smart structures. Deficiencies of commercial and research AE monitoring instrumentation are identified and discussed. Research issues that must be resolved before AE technology can be incorporated into smart structuresare identified. Directions for future AE technology development are suggested.
N D T & E International 1994 Volume 27, Number 4
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T h e s u b j e c t s c o v e r e d in p r e v i o u s issues f r o m F e b r u a r y 1993 o n w a r d s a r e : A c o u s t i c and u l t r a s o n i c m e a s u r e m e n t o f elastic c o n s t a n t s - 27(1); A c o u s t i c e m i s s i o n testing o f pressure vessels - 26(6); M a g n e t i c flux l e a k a g e - 26(1); N D T in r a i l w a y s - 26(4); N D T using b a c k s c a t t e r o f u l t r a s o u n d - 26(5); S y n t h e t i c a p e r t u r e signal p r o c e s s i n g - 26(3); T h e r m o g r a p h y o f c o m p o s i t e s - 26(2); U l t r a s o n i c N D E o f a i r c r a f t - 27(3); X - r a y t o m o g r a p h y - 27(2)
Condition monitoring using acoustic and thermal techniques 55246 Sutherland, H.I.; Musial, W. Application of nondestructive techniques to the testing of a wind turbine blade Sandia National Labs., Alburquerque, New Mexico (United States), DE93016731/GAR, 8pp. (1993) This paper reports on the use of two NDT techniques to monitor the behavior of a typical wind turbine blade during a quasi-static test-to- failure. The test used a three-point spanwise load distribution to load a 7.9-m blade to failure. The two NDT techniques used were acoustic emission and coherent optical. Typical results are presented to demonstrate the ability of these two techniques to locate and monitor both high damage regions and flaws in the blade structure. 55244 Guang, Dai; Li, Wang Ya; Ting, Xu Yang ; Zhang, Bao Qi A E testing of a low-alloy steel pressure vessel NDT & E International, Vol. 26, No. 6, pp. 291-297 (Dec. 1993) Testing pressure vessels in the field is generally conducted within a given range of test procedures, determined beforehand according to specified criteria. Thus monitoring of flaw growth using AE is carried out under restricted conditions. To study the AE activity of flaws in welded seams of a pressure vessel (made of low-alloy steel) at different stages of growth and at different strains, tests were conducted on both spherical and cylindrical pressure vessels containing different artificial flaws. For given test conditions, the relationships between AE activity of artificial flaws and measured strains were studied. These tests form an important basis for the testing and assessment of engineering pressure vessels in the fiield. 55223 Schreyer, J.; Jackel, G. Nondestructive testing of tunnel linings. Development of a nondestructive method for assessment of the condition of outer tunuellings (in G e r m a n ) Studiengesellschaft fuer Unterirdische Verkehrsaniagen e.V., Cologne (Germany), TIBIA93-O24791GAR, 143pp. (Jun 1991) The study gives an overview on nondestructive testing methods for the evaluation of the state of traffic tunnel linings and selected test methods have been checked in the laboratory scale. Most promising methods are based on the thermographic, georader and multispectral analyses and their combinations. 55000 Bicknell, A.; Smith, J.S.; Lucas, J. I n f r a r e d sensor for top face monitoring for weld pools Measurement Science and Technology, Vol. 5, No. 4, pp. 371-378 (Apr. 1994) The development of a novel sensor for the measurement of bead size in tungsten inert gas (TIG) welds is described. A passive vision-based sensor combines infrared imaging of the weld pool and selective optical filtering, both to reduce excessive arc glare and improve contrast between weld pool and heat affected zone (HAZ). The arc interruption and external illumination techniques, used by others, are not required. Image quality is shown to be comparable to that obtained with external illumination and superior to that of arch interruption methods. The technique has been successfully applied to both pulsed and continuous TIG welding of stainless steel in order to maintain the bead size during a welding run. 54845 McBride, S.; Hong, Y.; Pollard, M. Enhanced fatigue crack detection in aging aircraft using continuous acoustic emission monitoring Review of Progress in Quantitative Nondestructive Evaluation, La Jolla, California (United States), 19-24 Jul. 1992. Voi. 12B, pp. 2191-2197 Edited by D.O. Thompson and D.E. Chimenti. Plenum Press (1993) ISBN 0- 306 A,4~83-6 This work will describe the use of acoustic emission to detect fatigue
cracks in a full-scaleaircraftstructureduring ground durabilityand damage
tolerance testing. Data is presented for about 3,000 equivalent flying hours of continuous monitoring and describes our progress during the past two years. Attention is focused here on the relative effectiveness of periodic acoustic emission testing and continuous acoustic emission monitoring. Comparison of the acoustic emission results with those of conventional NDI are made. 54278 Ouellette, P.; Hoa, S.V. Acoustic emission signal trends during high cycle fatigue of FRP/balsa wood core vessels Journal of Acoustic Emission, Vol. 11, No. 2, pp. 65-70 (Apr.-Jun. 1993) Experimental results from acoustic emission tests on two fiber reinforced plastic/balsa wood core vessels that have been subjected to long cycle fatigue loading are presented. These results together with results obtained from short term cyclic tests on twenty one other fiber reinforced plastic vessels provide substantial supporting evidence for a Recommended Practice for Acoustic Emission Monitoring of Fiber Reinforced Plastic with Balsa Wood Core Highway Tankers. 54093 Pellionisz, P.; Jha, S.K.; Goswami, G.L. Acoustic emission experiments for P H W R
technology
development
Central Research Institute for Physics, Budapest (Hungary), KFFI-1992- 19/G,I, 16 pp. (1992) The aim was to check the method's capability for leakage detection and shuttle movement monitoring at Pressurized Heavy Water Reactors (PHWR) as well as its applicability in monitoring at Pressurized Heavy Reactors (PHWR) as well as its applicability in monitoring manufacturing processes such as laser welding. In this paper the measurements are shortly described and results presented. 53841 Kulowitch, P.I. Development of an inertially-loaded test fixture for in-flight evaluation of an acoustic emission monitoring system Navel Air Development Center, Warminster, Pennsylvania (United States), AD-A260 940/2/GAR, 47 pp. (Jul. 1991) An inertially-loaded test fixture was designed for use with an in- flight acoustic emission monitoring system. The fixture provides a controlled method of simulating structural cracking during flight. It will be used to determine if acoustic emission monitoring is a viable method for monitoring crack growth in aircraft structures which are difficult to access and inspect. 53828
Lenain, J.-C.
R e w i e w o f the applicants of acoustic emission in industry
Revue Pratique de Controle Industriel, Suppl. No. 182, pp. 24-27 (Oct. 1993) This paper show several examples of applications: pressure vessels, spheres, storage tank,.., and so gives an idea about the database available. Also Ae is used as a condition monitoring method (corrosion, leak,...) of storage tank bottom. New developments have been made for testing the aircraft structures such fuselage, wing.., to answer the ageing problem. 53588 Hamstad, M.A.; Sendeckyj, G.P. Acoustic emission technology for smart structures Journal of Acoustic Emission, Vol. I 1, No. 1, pp. 33-41 (Jan.-Mar. 1993) Acoustic emission technology is reviewed for potential applications to smart structures. Deficiencies of commercial and research AE monitoring instrumentation are identified and discussed. Research issues that must be resolved before AE technology can be incorporated into smart structuresare identified. Directions for future AE technology development are suggested.
N D T & E International 1994 Volume 27, Number 4
209