GROUND EXPOSURE OF COMPOSITE MATERIALS FOR HELICOPTERS.

被引：0

作者：

Baker, Donald J. ^{[1
]}

机构：

[1] USAVSCOM, Hampton, VA, USA, USAVSCOM, Hampton, VA, USA

来源：

Journal of the American Helicopter Society | 1988年 / 33卷 / 02期

关键词：

COMPOSITE MATERIALS - Fiber Reinforced - MATERIALS TESTING - Weathering - PLASTICS; REINFORCED - Mechanical Properties;

D O I：

10.4050/jahs.33.2.15

中图分类号：

学科分类号：

摘要：

Residual strength results are presented on four composite material systems that have been exposed for five years at locations on the North American continent. The exposure locations are near the areas where Bell Model 206L helicopters participating in a NASA/U. S. Army sponsored flight service program are flying in daily commercial service. The composite systems are (1) Kevlar-49 fabric/F-185 epoxy, (2) Kevlar-49 fabric/LRF-277 epoxy, (3) Kevlar-49 fabric/CE-306 epoxy, (4) T-300 graphite/E-788 epoxy. All material systems exhibited good strength retention in compression and short beam shear. The Kevlar-49/LRF-277 epoxy retained 85 to 95 percent of the baseline strength, while the other material systems exceeded 90 percent of baseline strength. Residual tensile strength of all materials did not show a significant reduction. The moisture absorption data are also presented.

引用

页码：15 / 20