Long-term damage of discrete-fiber-reinforced composites with transversely isotropic inclusions and stress-rupture microstrength described by an exponential power function

2009 ◽  
Vol 45 (2) ◽  
pp. 125-133 ◽  
Author(s):  
L. P. Khoroshun ◽  
L. V. Nazarenko
Keyword(s):  
Power Function ◽  
Stress Rupture ◽  
Transversely Isotropic ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Discrete Fiber ◽  
Exponential Power

Effects of mixed acid solution on bromide epoxy vinyl ester and its glass fiber reinforced composites

2021 ◽  
Vol 63 (3) ◽  
pp. 203-208
Author(s):  
Lingli Huang ◽  
Ruigang Hou ◽  
Yujian Liu ◽  
Qidong Shang
Keyword(s):  
Acid Solution ◽  
Glass Fiber ◽  
Vinyl Ester ◽  
Fiber Reinforced Composites ◽  
Flexural Properties ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Mixed Acid ◽  
Glass Fiber Reinforced

Abstract As fiber reinforced plastics (FRP) have been increasingly widely used, they may sometimes come into contact with several corrosive media simultaneously, for example, the condensate in the smokestack liners of coal-fired power FGD systems. To study the long-term performance and degradation mechanism of FRP in these complicated environments, an accelerated aging test of bromide epoxy vinyl ester (Br-VE) and its glass fiber reinforced composites (GF/VE) in a mixed acid solution(H2SO4, HNO3, HF and HCl) at three different temperatures(25, 55 and 80 °C) for 180 days was carried out. Weight changes, flexural properties, Fourier transforming infrared spectra (FTIR), dynamic thermal mechanical (DMA), macroscopic and microscopic morphology were investigated. Results showed that immersion temperature has important effects on the corrosion behavior of specimens. The long-term weight change behavior of GF/VE at normal temperature was in accordance with Fick’s second law, but deviated at higher temperature. Flexural properties of GF/VE declined more drastically than those of Br-VE at elevated temperatures. The Tg of GF/VE decreased with rising temperatures. Results also indicted that Br-VE and GF/VE manifested varied degradation mechanisms when subject to the same mixed acid medium immersion. The degradation of GF/VE mainly involved plasticization, embrittlement, the hydrolysis of resin, an ion exchange between HF, H+ and Si-O-Si or alkali metal of the fiber as well as the debonding of the resin/fiber interface.

Elastic Constants of Fiber-Reinforced Composites With Transversely Isotropic Constituents

1971 ◽  
Vol 38 (4) ◽  
pp. 1062-1065 ◽  
Author(s):  
Ernst Behrens
Keyword(s):  
Elastic Constants ◽  
Lattice Model ◽  
Hexagonal Lattice ◽  
Transversely Isotropic ◽  
Numerical Results ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced ◽  
Explicit Expressions

Several models for calculating elastic constants of fiber-reinforced composites with transversely isotropic constituents are discussed. Numerical results are obtained from simple explicit expressions and compared with recently published computer solutions of a hexagonal lattice model.

Cross-Property Connections for Fiber-Reinforced Composites with Transversely Isotropic Constituents

2007 ◽  
Vol 142 (3-4) ◽  
pp. 299-306 ◽  
Author(s):  
Igor Sevostianov ◽  
Federico J. Sabina ◽  
Julian Bravo-Castillero ◽  
Raul Guinovart-Diaz ◽  
Reinaldo Rodriguez-Ramos
Keyword(s):  
Transversely Isotropic ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Fiber Reinforced
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