Effect of Water Environment on Fatigue Behavior of Fiberglass Reinforced Plastics

The objective of research work is to establish the influence of environmental factors such as moisture and temperature on the shear properties of metal and polymer joints. The specimens of metal and polymer joints were prepared with aluminium plate and glass fibre reinforced plastics. Here three types of resins were used for joining the metal and polymer composites viz. epoxy vinyl ester and polyester. The joint specimens were exposed to 80 C temperature and relative humidity of 90% for 25 days in environmental chamber. The single and double shear strength of the joints for ascast and hygrothermal exposed specimens are investigated. The results showed that the strength of hydrothermal specimens decreased about 25%, 18% and 33% for epoxy, vinyl ester and polymer adhesive joints respectively. The result also shows that vinyl ester joints exhibit lower water absorption and property degradation of the joints.

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Influence of the Test Geometry on the Fatigue Behavior of Fiber Reinforced Plastics in Tension and Interlaminar Shear at RT and 77 K

Advances in Cryogenic Engineering Materials ◽

10.1007/978-1-4615-4293-3_23 ◽

2000 ◽

pp. 181-187 ◽

Cited By ~ 2

Author(s):

P. Rosenkranz ◽

K. Humer ◽

H. W. Weber

Keyword(s):

Fatigue Behavior ◽

Fiber Reinforced ◽

Reinforced Plastics ◽

Test Geometry ◽

Fiber Reinforced Plastics ◽

Interlaminar Shear

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Strength Deterioration and Degradation Mechanism of Glass Chopped Reinforced Plastics in Water Environment

JSME international journal Ser 1 Solid mechanics strength of materials ◽

10.1299/jsmea1988.31.3_619 ◽

1988 ◽

Vol 31 (3) ◽

pp. 619-626 ◽

Cited By ~ 3

Author(s):

Hideki SEKINE ◽

Keiichi SHIMOMURA ◽

Norio HAMANA

Keyword(s):

Degradation Mechanism ◽

Water Environment ◽

Strength Deterioration ◽

Reinforced Plastics

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Investigation on the Crack Evolution in Glass-Fiber Laminates Depending on the Stacking Sequence

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.809.29 ◽

2019 ◽

Vol 809 ◽

pp. 29-34

Author(s):

Benjamin Begemann ◽

Peter Horst

Keyword(s):

Glass Fiber ◽

Fatigue Testing ◽

Fatigue Behavior ◽

Load Level ◽

Stiffness Degradation ◽

Crack Evolution ◽

Static Tests ◽

Reinforced Plastics ◽

Matrix Cracks ◽

Lag Model

In this paper experiments on the fatigue behavior of flat and tubular Glass Fiber Reinforced Plastics (GFRP) specimens with three different layups ([0/905/0], [0/902/01/2]s and [0/±45/01/2]s) are presented. The experiments are conducted to study the mechanics under cyclic tension-tension loading (R=0.1) until crack saturation (CDS). Fatigue testing is performed below the critical static load level where first matrix cracks can be observed. Therefore Load Levels (LLs) are derived from crack evolution curves obtained by static tests under usage of transmitted light photography. The shear lag model of Berthelot [1] is applied to the two cross-ply specimens to predict crack evolution. The results show good agreement between the prediction and the experimental data. Deviations can be found in prediction of crack evolution in [0/902/01/2]s-specimens. For predicting fatigue stiffness degradation the phenomenological model of Adden [2] is used. The results show good capabilities for predicting stiffness degradation after crack onset.

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