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

1994 ◽  
Vol 29 (18) ◽  
pp. 4736-4741 ◽  
Author(s):  
A. Djumaev ◽  
K. Takahashi
Keyword(s):  
Moisture Absorption ◽  
Dynamic Stiffness ◽  
Commingled Yarn ◽  
Effect Of Moisture ◽  
Yarn Composite

Effect of moisture absorption on damping and dynamic stiffness of carbon fiber/epoxy composites

2009 ◽  
Vol 23 (11) ◽  
pp. 2998-3004 ◽  
Author(s):  
Behzad Ahmed Zai ◽  
M. K. Park ◽  
H. S. Choi ◽  
Hassan Mehboob ◽  
Rashid Ali
Keyword(s):  
Carbon Fiber ◽  
Moisture Absorption ◽  
Dynamic Stiffness ◽  
Epoxy Composites ◽  
Effect Of Moisture ◽  
Carbon Fiber Epoxy

Effect Of Moisture On The Physical Properties Of Polyimide Films

1991 ◽  
Vol 227 ◽  
Author(s):  
Rajeevi Subramanian ◽  
Michael T. Pottiger ◽  
Jacqueline H. Morris ◽  
Joseph P. Curilla
Keyword(s):  
Dielectric Constant ◽  
Steady State ◽  
Electrical Properties ◽  
Relative Humidity ◽  
Quartz Crystal ◽  
Moisture Absorption ◽  
Relative Dielectric Constant ◽  
Moisture Uptake ◽  
Polyimide Films ◽  
Effect Of Moisture

ABSTRACTMoisture absorption and its effect on electrical properties were measured for several polyimides. A Quartz Crystal Microbalance (QCM) was used to investigate the moisture absorption in BPDA/PPD, PMDA/ODA, and BTDA//ODA/MPD polyimides. The steady-state moisture uptake in polyimides as a function of relative humidity (RH) was determined by exposing film samples to successively higher RH values ranging from 10 to 85% at 25°C. The isothermal moisture absorption as a function of percent RH was found to be nearly linear for all of the polyimides studied. The effect of moisture on the electrical properties of a BPDA/PPD polyimide was also investigated. The relative dielectric constant at 25 °C was found to be a linear function of the moisture absorbed.

Effect of Moisture Absorption on the Bending Strength of CFRP

2012 ◽  
Vol 450-451 ◽  
pp. 482-485 ◽  
Author(s):  
A Ying Zhang ◽  
Di Hong Li ◽  
Dong Xing Zhang
Keyword(s):  
Moisture Content ◽  
Composite Laminates ◽  
Immersion Time ◽  
Moisture Absorption ◽  
Bending Strength ◽  
Experimental Results ◽  
Bending Tests ◽  
Three Point Bending ◽  
Damage Propagation ◽  
Effect Of Moisture

The effects of moisture content on the bending strength of T300/914 composite laminates that immersed in water for 7 days and 14 days was discussed in this paper. The three-point bending tests were conducted on the composite laminates. Experimental results reveal that the moisture content in the laminates increased with immersion time and that moisture absorption accelerated damage propagation in the composite laminates. The bending strength of the unaged, aged specimens were characterized and analyzed. Compared to the unaged specimens, the bending strength of the composite laminates immersed for 7 and 14 days decreased by 6.62% and 16.98%, respectively. The results revealed that the bending strength of the aged specimens decreased with the increasing immersion time.

Effect of Moisture Absorption on the Bending Strength of Carbon/Epoxy Composites with Voids

2011 ◽  
Vol 311-313 ◽  
pp. 165-168
Author(s):  
A Ying Zhang ◽  
Jian She Zhang ◽  
Jia Zhi Wang ◽  
Di Hong Li ◽  
Dong Xing Zhang ◽  
...  
Keyword(s):  
Moisture Content ◽  
Water Uptake ◽  
Immersion Time ◽  
Room Temperature ◽  
Moisture Absorption ◽  
Bending Strength ◽  
Experimental Results ◽  
Epoxy Composites ◽  
Effect Of Moisture

The effects of voids on the bending strength of T300/914 laminates that exposed to room temperature, hygrothermal and drying environment was discussed in this paper. The experimental results revealed that the saturated moisture content and the rate of water uptake increased with porosity increasing from 0.71% to 1.50%, which proved that voids facilitate moisture absorption. The bending strength of the unaged, aged and dried specimens were characterized and analyzed. The results revealed that the bending strength of the aged specimens decreased with the increasing void contents and immersion time. Compared to the unaged specimens, the bending strength of the aged specimens decreased 13.33% and 18.78% with porosity of 0.71% and 1.50%, respectively. The bending strength of the dried specimens was higher than that of the aged specimens and lower than that of the unaged specimens in the case of similar porosity.

Effect of Moisture Absorption on the Bending Strength of CFRP

2012 ◽  
Vol 450-451 ◽  
pp. 482-485
Author(s):  
A Ying Zhang ◽  
Di Hong Li ◽  
Dong Xing Zhang
Keyword(s):  
Moisture Absorption ◽  
Bending Strength ◽  
Effect Of Moisture

Effect of Moisture Absorption on Hot/Wet Compressive Strength of T800HIPMR-15 Carbon/Polyimide

1999 ◽  
Vol 33 (18) ◽  
pp. 1685-1698 ◽  
Author(s):  
Toshiyuki Shimokawa ◽  
Yasumasa Hamaguchi ◽  
Hisaya Katoh
Keyword(s):  
Compressive Strength ◽  
Moisture Absorption ◽  
Effect Of Moisture
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