A Hybrid Damage Assessment For E-And S-Glass Reinforced Laminated Composite Structures Under In-Plane Shear Loading
| Autor: | Çağdaş Akalın, Murat Buyuk, Çağatay Yılmaz, İbrahim Günal, Hakan Çelik, Afzal Suleman, Mehmet Yildiz |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Glass fiber Delamination Composite number 02 engineering and technology 021001 nanoscience & nanotechnology T175 Industrial research. Research and development Shear modulus Transverse plane 020303 mechanical engineering & transports 0203 mechanical engineering Acoustic emission Shear (geology) Thermography Ceramics and Composites Composite material 0210 nano-technology Civil and Structural Engineering |
| Popis: | Micro-damage initiation and accumulation in two different Glass Fiber Reinforced -E-glass and S-glass- Laminated Composite Structures (LCS) subjected to in-plane shear stressing are monitored with Acoustic Emission (AE) and thermography methods. AE signals caused by micro-damage formation are graphed as a scatter plot of Weighted Peak Frequency (WPF) versus Partial Power 2 (PP2) features and clustered using the K-means algorithm with Bray Curtis dissimilarity function thus resulting in three different well-separated clusters. Each of these clusters corresponds to different micro damages, i.e., transverse cracks, delaminations, or fiber ruptures. It is observed that the E-glass reinforced LCS has higher numbers of AE hits. Thus, the total amount of micro-damage incurred as well as the average temperature change measured by thermography is higher for the E-glass reinforced LCS. It is shown that due to the curing induced residual tensile stress in E-glass reinforced LCS, the initial formation of delamination in E-glass reinforced LCS starts at higher load level. Under the applied shear load, a significant reduction in in-plane shear modulus is observed both for the E-glass and S-glass-reinforced LCS where the E-glass reinforced LCS shows greater reduction. The decrease in in-plane shear modulus is attributed to micro-damage accumulated in the LCS. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|