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Message :	[QUOTE]Originally written by bgibbons on 2008-03-24 9:29 PM Alan Patching in Australia has been performing long term fatique testing for fiberglass gliders since the early 70's. My recollection is that they had not discovered any finite lifetime limits to date. Alan received the 2006 Lilienthal Gliding Medal for, among many other contributions, his long study of lifetime limits in FGRP structures. If you have access to Technical Soaring you can find a number of Alan's articles. Volume I, Number 2, October, 1971 C.A. Patching, Establishing the Structure Integrity of Aging Gliders [Construction], page 17 Volume VI, Number 3, March, 1981 JG.P. Esson and C.A. Patching, Fatigue Life Considerations for Gliders Operated in Australia, page 10 Volume 15, Number 4, October, 1991 C.A. Patching and L.A. Wood, Fatigue Testing of A GFRP Glider [Construction], page 100 Volume 22, Number 1, January, 1998 C.A. Patching and L.A. Wood, Further Fatigue Testing of a Glass Fiber Reinforced Plastic Glider Wing [Aerodynamics\Testing], page 11[/QUOTE]
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bgibbons

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Subject : RE: Life of a glass ship
Posted : 2008-03-24 9:29 PM
Post #11761 - In reply to #11757

Alan Patching in Australia has been performing long term fatique testing for fiberglass gliders since the early 70's. My recollection is that they had not discovered any finite lifetime limits to date.

Alan received the 2006 Lilienthal Gliding Medal for, among many other contributions, his long study of lifetime limits in FGRP structures.

If you have access to Technical Soaring you can find a number of Alan's articles.

Volume I, Number 2, October, 1971
C.A. Patching, Establishing the Structure Integrity of Aging Gliders [Construction], page 17

Volume VI, Number 3, March, 1981
JG.P. Esson and C.A. Patching, Fatigue Life Considerations for Gliders Operated in Australia, page 10

Volume 15, Number 4, October, 1991
C.A. Patching and L.A. Wood, Fatigue Testing of A GFRP Glider [Construction], page 100

Volume 22, Number 1, January, 1998
C.A. Patching and L.A. Wood, Further Fatigue Testing of a Glass Fiber Reinforced Plastic Glider Wing [Aerodynamics\Testing], page 11