Compression properties and damage mechanisms of stitched carbon/epoxy composites

2013 ◽  
Vol 86 ◽  
pp. 52-60 ◽  
Author(s):  
Arief Yudhanto ◽  
Naoyuki Watanabe ◽  
Yutaka Iwahori ◽  
Hikaru Hoshi
Keyword(s):  
Epoxy Composites ◽  
Damage Mechanisms ◽  
Compression Properties

Evaluation of Solid Particle Erosion Damage on E-Glass/Epoxy Composites Using Acoustic Emission Activity

2005 ◽  
Author(s):  
N. H. Yang ◽  
H. Nayeb-Hashemi
Keyword(s):  
Acoustic Emission ◽  
Solid Particle ◽  
Residual Strength ◽  
Epoxy Composites ◽  
Distribution Model ◽  
Solid Particle Erosion ◽  
Particle Erosion ◽  
Damage Mechanisms ◽  
Erosion Damage ◽  
Impact Angles

The effect of solid particle erosion on the strength properties of E-glass/epoxy composite was investigated. Solid particle erosion with SiC particles 400 μm to 500 μm in diameter was simulated on 12 ply [45°/−45°/0°/45°/−45°/0°]s E-glass/epoxy composites with constant particle velocity of 42.5 m/s at impact angles of 90°, 60°, and 30° for 30, 60, 90 and 120 seconds. Damaged and undamaged specimens were subjected to tensile tests while monitoring their acoustic emission (AE) activity. An erosion damage parameter was defined as a function of the particle impact angle and erosion duration to determine the residual tensile strength of the composite. Scanning electron microscope (SEM) images of the erosion damaged specimens revealed the same damage mechanism occurred at different impact angles. The distribution of AE events by event duration, ring down counts and energy distribution were used to characterize the different damage mechanisms that occurred during tensile loading of damaged and undamaged specimens. The results showed AE activity could be used to distinguish between different damage mechanisms within the composite, such as fiber/matrix debonding, delamination and fiber fracture. The Weibull probability distribution model and the AE stress delay parameter model were developed to relate the AE activity to the erosion damage and residual strength. The results showed both the Weibull probability model and the stress delay model could be used to predict residual strength of the composites.

Effect of stitch density on tensile properties and damage mechanisms of stitched carbon/epoxy composites

2013 ◽  
Vol 46 ◽  
pp. 151-165 ◽  
Author(s):  
Arief Yudhanto ◽  
Naoyuki Watanabe ◽  
Yutaka Iwahori ◽  
Hikaru Hoshi
Keyword(s):  
Tensile Properties ◽  
Epoxy Composites ◽  
Damage Mechanisms ◽  
Stitch Density

Temperature effects on the compression behavior and failure of 3-D MWK glass fabric-reinforced epoxy composites

2018 ◽  
Vol 31 (4) ◽  
pp. 449-461 ◽  
Author(s):  
Dian-sen Li ◽  
Zhuo Wang ◽  
Hong-wei Duan ◽  
Lei Jiang
Keyword(s):  
Temperature Effects ◽  
Elevated Temperatures ◽  
Epoxy Composites ◽  
Glass Fabric ◽  
Fiber Architecture ◽  
Compression Behavior ◽  
Compression Properties ◽  
Out Of Plane ◽  
Plane Compression ◽  
Loading Modes

This article reports the temperature effects on the in-plane and out-of-plane compression behavior and failure of 3-D multiaxial warp-knitted glass fabric-reinforced epoxy composites. The damage and fracture morphology are observed from macroscopic and microscopic views, and the failure mechanism is demonstrated. The results show that the temperature has significant effect on in-plane and out-of-plane compression properties, the stress versus strain curves decline, and the properties decrease significantly with increasing the temperature. The temperature of 75°C is a key point, at which change in compression properties occurs, and at 150°C, the materials become plastic. Moreover, fiber architecture and loading modes are also important factors on compression properties of composites. The results also show that the damage and failure patterns vary with temperature, fiber architecture, and loading modes. Under in-plane compression, material A shows local 0° fiber layers delaminating and becomes softening and plasticity with increasing temperature. Material B shows delaminating between 0°, 90°, +45°, and −45° fiber layers along 45° angle and exhibits multiple delaminating at elevated temperatures. Under out-of-plane compression, material A shows multiple local shear fracture with 45° angle and experiences softening, roughness, and expansion at elevated temperatures. Material B exhibits shear brittle failure clearly, and delaminating dominates the main failure with increasing the temperature.

Damage mechanisms in glass/epoxy composites subjected to simultaneous humidity and freeze-thaw cycles

2021 ◽  
Vol 120 ◽  
pp. 105041
Author(s):  
Mohammad Abedi ◽  
S. Ebrahim Moussavi Torshizi ◽  
Roohollah Sarfaraz
Keyword(s):  
Epoxy Composites ◽  
Damage Mechanisms ◽  
Freeze Thaw

Experimental study on compression properties and failure mechanism of 3D MWK carbon/epoxy composites at elevated temperatures

2017 ◽  
Vol 39 (S4) ◽  
pp. E1987-E1999 ◽  
Author(s):  
Nan Jiang ◽  
Dian-Sen Li ◽  
Qian-qian Yao ◽  
Hong-wei Duan ◽  
Frank Ko
Keyword(s):  
Experimental Study ◽  
Failure Mechanism ◽  
Elevated Temperatures ◽  
Epoxy Composites ◽  
Compression Properties
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