PMC-32: Long-Term Durability of Plain-Woven CFRP Laminates under Water Conditions(PMC-V: POLYMERS AND POLYMER MATRIX COMPOSITES)

2005 ◽  
Vol 2005 (0) ◽  
pp. 47
Author(s):  
M. NAKADA ◽  
J. ICHIMURA ◽  
Y. MIYANO
Keyword(s):  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Cfrp Laminates ◽  
Water Conditions

Long-term durability of polymer matrix composites under hostile environments

2005 ◽  
Vol 412 (1-2) ◽  
pp. 159-164 ◽  
Author(s):  
H. Kawada ◽  
A. Kobiki ◽  
J. Koyanagi ◽  
A. Hosoi
Keyword(s):  
Polymer Matrix ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Hostile Environments

On the Transient Hygroscopic Stresses in Polymer Matrix Laminated Composites Plates with Cyclic and Unsymmetric Environmental Conditions

2005 ◽  
Vol 13 (5) ◽  
pp. 489-503 ◽  
Author(s):  
A. Tounsi ◽  
M. Bouazza ◽  
S. Meftah ◽  
E. Adda-Bedia
Keyword(s):  
Polymer Matrix ◽  
Composite Structures ◽  
Polymer Matrix Composites ◽  
Matrix Composites ◽  
Stress Distributions ◽  
Moist Environment ◽  
Cyclic Variations ◽  
Transient Hygroscopic Stresses ◽  
Structural Parts

The use of aircraft structural parts made of polymer matrix composites subjected to severe environment conditions calls for better knowledge of their long – term behaviour, with an emphasis on their ability to withstand important cyclic variations of moisture and temperature. The influence of temperature and moisture on such structures is receiving special attention, because it induces transient residual stresses within the plies. Such stresses must be taken into account in the design of composite materials, particularly aerospace structures, e.g. aircraft. In the present paper the transient hygroscopic stresses induced by cyclic and unsymmetric environmental loadings which simulate an aeronautical application are investigated. It is shown that the heterogeneity and anisotropy of such plates generally result in transient stress distributions which are very different from the equilibrium stress distribution. Some stacking sequences exhibit important stresses within the plies. These stresses have to be taken into account in the design of composite structures submitted to a moist environment.

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