scholarly journals Frequency Dependence of the <i>b</i>-Value Used for Acoustic Emission Analysis of Glass Fiber Reinforced Plastics

2017 ◽  
Vol 07 (03) ◽  
pp. 117-129 ◽  
Author(s):  
Do Yun Jung ◽  
Yoshihiro Mizutani ◽  
Akira Todoroki ◽  
Yoshiro Suzuki
Keyword(s):  
Acoustic Emission ◽  
Glass Fiber ◽  
Frequency Dependence ◽  
Fiber Reinforced ◽  
Emission Analysis ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics ◽  
Acoustic Emission Analysis

Fracture and acoustic emission characteristics of glass fiber reinforced plastics panels for hot water

1994 ◽  
Vol 15 (3) ◽  
pp. 206-216 ◽  
Author(s):  
Tohru Morii ◽  
Toshio Tanimoto ◽  
Hiroyuki Hamada ◽  
Zen-Ichiro Maekawa ◽  
Takahiro Hirano ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Glass Fiber ◽  
Hot Water ◽  
Emission Characteristics ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics

scholarly journals The Effects of Weathering on Mechanical Properties of Glass Fiber Reinforced Plastics (Grp) Materials

1970 ◽  
Vol 1 (2) ◽  
Author(s):  
H. Abdullah ◽  
S. Al Araimi and R. A. Siddiqui
Keyword(s):  
Mechanical Properties ◽  
Relative Humidity ◽  
Ultraviolet Radiation ◽  
Glass Fiber ◽  
Exposure Time ◽  
Atmospheric Conditions ◽  
Fiber Reinforced ◽  
Reinforced Plastics ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Plastics

Glass fiber reinforced plastics composite is extensively used as a structural material for pools, oil pipes and tanks because it has good corrosion resistance properties.  The effects of weathering on the mechanical properties of glass fiber reinforced plastics (GRP) in the Sultanate of Oman have been studied.  The tensile and three point bend specimens were exposed to outdoor conditions (open atmosphere) in sunlight and tested for various intervals of time.  It was observed that as the exposure time to sunlight, ultraviolet radiation and dust increases the mechanical properties of GRP materials decrease.  The effects of relative humidity (%RH) on the mechanical properties were also studied. It was found that as the relative humidity increased in the atmosphere during the exposure time, the tensile strength, flexural strength and modulus of elasticity are lowered. This work has revealed that the decrease in the mechanical properties of GRP under weathering conditions is subjected to atmospheric conditions such as humidity, temperature, ultraviolet radiation and pollutant.Key Words: Weathering, Glass-Fiber Reinforced Plastics, Degradation

scholarly journals Determination of Fatigue Damage Initiation in Short Fiber-Reinforced Thermoplastic through Acoustic Emission Analysis

2021 ◽  
Vol 5 (8) ◽  
pp. 221
Author(s):  
Janna Krummenacker ◽  
Joachim Hausmann
Keyword(s):  
Acoustic Emission ◽  
Fatigue Loading ◽  
Fiber Reinforced ◽  
Emission Analysis ◽  
Damage Initiation ◽  
Glass Fiber Reinforced ◽  
Stress Threshold ◽  
Strength Tests ◽  
Polyamide 6.6 ◽  
Acoustic Emission Analysis

This study investigates the damage initiation in short glass fiber-reinforced polyamide 6.6 under fatigue loading using acoustic emission analysis. An optimized specimen geometry was developed to meet the specific requirements of this testing method, at the same time allowing further micromechanical studies. Specimens were preloaded with tensile–tensile fatigue loading, varying the maximum stress and the number of load cycles. Subsequently, the acoustic emission signals in residual strength tests were compared to those of undamaged specimens. The idea behind this approach is that only the damage that has not already occurred under fatigue load can be recorded in the residual strength tests. Using the analysis of acoustic energy, a stress threshold for damage initiation was identified. Furthermore, with tension–tension fatigue tests, the SN curve of the material was determined to estimate the lifetime for the identified stress threshold. The presented approach allows us to estimate a so-called endurance limit of short glass fiber-reinforced polyamide 6.6.

Sign in / Sign up

Export Citation Format

Share Document