Tolerance of Composite Pipes to Local Impact Damage

1996 ◽  
Vol 210 (3) ◽  
pp. 181-192 ◽  
Author(s):  
S R Reid ◽  
C Peng ◽  
J N Ashton
Keyword(s):  
Damage Tolerance ◽  
Impact Damage ◽  
Local Loading ◽  
Experimental Programme ◽  
Filament Wound ◽  
Nose Shape ◽  
Local Impact ◽  
Chopped Strand Mat ◽  
Composite Pipes

The results of an extensive experimental programme on local loading of composite pipes are presented. Particular attention is directed to the influence of projectile nose shape on the damage tolerance of the pipes. Both filament wound pipes and lined chopped-strand mat pipes are considered.

Comparison of tensile properties and impact damage tolerance of hemp and glass fiber composites

2011 ◽  
Vol 30 (22) ◽  
pp. 1877-1893 ◽  
Author(s):  
Asim Shahzad
Keyword(s):  
Glass Fiber ◽  
Tensile Properties ◽  
Damage Tolerance ◽  
Impact Damage ◽  
Fiber Composites ◽  
Hemp Fiber ◽  
Glass Fiber Composites ◽  
Chopped Strand Mat ◽  
Strength And Stiffness ◽  
Intrinsic Strength

Tensile properties and impact damage tolerance of hemp fiber and chopped strand mat (CSM) glass fiber composites have been evaluated and compared. The absolute and specific tensile properties of CSM glass fiber composites were found to be much superior to hemp fiber composites. Impact damage tolerance of hemp fiber composites was also quite low compared to CSM glass fiber composites. They lost almost half of their intrinsic strength and stiffness following an impact of 2 J energy. Considerable evidence of matrix fracture, interfacial debonding, and fiber fracture was found in the fracture surface. Following an impact at 4 J energy, hemp fiber composites lost almost 70% of their intrinsic strength and stiffness. In comparison, CSM glass fiber composites were able to endure an impact of 20 J energy for 70% reduction in their intrinsic strength and stiffness.

Comparison of the impact damage resistance of non-hybrid and intra-ply hybrid carbon/E-glass/polypropylene non-crimp thermoplastic composites

2018 ◽  
Vol 38 (1) ◽  
pp. 31-45 ◽  
Author(s):  
Gaye Kaya
Keyword(s):  
Damage Tolerance ◽  
Impact Damage ◽  
Low Velocity Impact ◽  
Thermoplastic Composites ◽  
Low Velocity ◽  
Impact Properties ◽  
Compression After Impact ◽  
Post Impact ◽  
The Impact ◽  
Hybrid Carbon

This study aims to compare the low-velocity impact and post-impact properties of intra-ply hybrid carbon/E-glass/polypropylene non-crimp thermoplastic composites with non-hybrid carbon/PP and E-glass/PP non-crimp thermoplastic composites. Impact test was performed at four energy levels as 15 J, 30 J, 45 J and 60 J. Post-impact properties of hybrid thermoplastic composites were tested by compression after impact method for each energy level to understand the impact damage tolerance of intra-ply hybrid carbon/E-glass/PP non-crimp thermoplastic composites. The effect of hybridization on energy absorption of composites was not significant, while C-scan results showed that the intra-ply hybrid non-crimp thermoplastic composites had smaller impact damage areas in comparison to the non-hybrid samples. Compression and compression after impact tests results confirmed that the intra-ply hybridization increased the toughness of the composite laminates. Also, the residual compression strength/modulus increased with hybridization which indicated to damage tolerance.

Material characterization of filament-wound composite pipes

2018 ◽  
Vol 206 ◽  
pp. 474-483 ◽  
Author(s):  
William Toh ◽  
Long Bin Tan ◽  
Kwong Ming Tse ◽  
Anthoni Giam ◽  
Karthikayen Raju ◽  
...  
Keyword(s):  
Material Characterization ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
Composite Pipes ◽  
Wound Composite

scholarly journals Mechanical Properties of Flax Tape-Reinforced Thermoset Composites

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5485
Author(s):  
Forkan Sarkar ◽  
Mahmudul Akonda ◽  
Darshil U. Shah
Keyword(s):  
Damage Tolerance ◽  
Impact Damage ◽  
Void Content ◽  
Polyester Resins ◽  
Thermoset Composites ◽  
Pull Out ◽  
Thermoset Resin ◽  
Comparable Performance ◽  
Interlaminar Shear ◽  
Flow Experiments

Three thermoset resin systems—bio-epoxy, epoxy, and polyester-with 30 v% flax fiber reinforcement have been studied to identify the optimal fiber–resin combination in a typical composite structure. Tensile, interface and interlaminar shear strength together with flexural and impact damage tolerance were compared in this study. The results revealed that mechanical and interfacial properties were not significantly affected by the different resin systems. Microscopy studies reveal that epoxy laminates predominantly fail by fibre linear breakage, polyester laminates by fiber pull-out, and bio-epoxy laminates by a combination of the two. The higher failure strains and pull-out mechanism may explain the better impact damage tolerance of polyester composites. Flow experiments were also conducted, revealing faster impregnation and lower void content with polyester resin, followed by bio-epoxy, due to their lower viscosities. Overall, bio-epoxy resin demonstrates comparable performance to epoxy and polyester resins for use in (semi-)structural bio-composites.

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