Effect of moisture absorption on damping performance and dynamic stiffness of NY-6/CF commingled yarn composite

✍ Scribed by A. Djumaev; K. Takahashi

• Book ID: 104738035
• Publisher: Springer
• Year: 1994
• Tongue: English
• Weight: 787 KB
• Volume: 29
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00356517

✦ Synopsis

The damping performance of a unidirectional (0 ~ nylon 6-carbon fibre (NY-6/CF) commingled yarn composite was experimentally studied with special concern for the effect of moisture absorption. Dried specimens were immersed in distilled water for a certain time to allow water to diffuse into the material. The damping measurements were conducted on double-cantilever and cantilever beam specimens using sinusoidal and impact-hammering techniques. The damping loss factor 11, flexural dynamic stiffness E' and loss modulus E" were evaluated as a function of the moisture content up to 8.2 wt%. 1"1 and E" initially increased significantly with increasing moisture content up to 5-6%. Further increase of the moisture content up to 8.2% caused a slight reduction in damping ability. The reverse was true of E' although the variation amplitude was smaller. The moisture content dependency of the damping performance obtained is discussed.