scholarly journals Impact resistance of hybrid glass fiber reinforced epoxy/nanoclay composite

2017 ◽  
Vol 57 ◽  
pp. 1-11 ◽  
Author(s):  
Ahmad Rafiq ◽  
Nesar Merah ◽  
Rachid Boukhili ◽  
Muneer Al-Qadhi
Keyword(s):  
Glass Fiber ◽  
Impact Resistance ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced

Fabrication and Flatwise Compression Property of Glass Fiber-Reinforced Polypropylene Corrugated Sandwich Panel

2017 ◽  
Vol 09 (08) ◽  
pp. 1750110 ◽  
Author(s):  
Bing Du ◽  
Li-Ming Chen ◽  
Hao Zhou ◽  
Yong-Guang Guo ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Impact Resistance ◽  
Thermoplastic Composite ◽  
Analytical Prediction ◽  
Fiber Reinforced ◽  
Aluminum Foams ◽  
Compression Property ◽  
Composite Sandwich ◽  
Composite Sandwich Structures ◽  
Glass Fiber Reinforced

Composite sandwich structures with cellular cores have wide application in many fields such as aerospace due to their excellent properties. Thermoplastic composite structure has superior impact resistance and recycling ability compared with conventional thermosetting. The glass fiber-reinforced polypropylene corrugated sandwich panels were fabricated by hot-pressing and hot-melting methods, and the flatwise compression property was experimentally investigated. Numerical simulations by use of ABAQUS VUMAT were subsequently carried out, which captured the main experimental features. The classic buckling theory was used to establish the analytical prediction. Experimental results were used to fit the boundary condition factor between face sheet and corrugated core. The fabricated thermoplastic corrugation has competing compression strength with some metal lattice cores and outperforms the commercial aluminum foams with the same density.

Impact performances and failure modes of glass fiber reinforced polymers in different curvatures and stacking sequences

2021 ◽  
pp. 002199832110590
Author(s):  
Cihan Kaboglu ◽  
Taha Y Eken ◽  
Yakup Yurekturk
Keyword(s):  
Glass Fiber ◽  
Failure Modes ◽  
Impact Resistance ◽  
Matrix Cracking ◽  
Fiber Reinforced ◽  
Stacking Order ◽  
Glass Fiber Reinforced ◽  
The Impact

Recently, glass fiber reinforced polymer composites have been increasingly used in applications which are exposed to impact loads due to their high strength, low weight, and corrosion resistance properties. Therefore, the effect of curvature of composite laminate on their impact resistance is important. In this study, the mechanical properties of three curvature diameters and two stacking sequences, which have not been compared before, were examined and compared. The diameter of curved composites is 760 mm, 380 mm, and 304 mm and flat designated as A, B, C, and D, respectively. The fiber stacking orders are [0/0/-45/+45/90/90]S and [90/90/-45/+45/0/0]S designated as Type 1 and Type 2, respectively. The drop-weight impact tests were performed and failure modes of composites were examined. It was observed that the impact resistance decreases with the increase of curvature, where 760 mm diameter and Type 2 composites had the highest strength in all of the composites. In addition, delamination, fiber breakage, and matrix cracking failure modes were observed in the composites after impact. The reason why the strength decreases as the curvature of the composite increases is that the curved areas create an effect that increases the external force applied. The reason why Type 2 stacking order is more durable than Type 1 stacking order is that the 90° fiber direction in the bottom layer has a damping effect on the applied force. According to the results of this study, composite materials with larger diameter and stacking order starting with 0° provides more mechanical strength. [Formula: see text]

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