Low-Speed Impact Damage in Filament-Wound CFRP Composite Pressure Vessels

1997 ◽  
Vol 119 (4) ◽  
pp. 435-443 ◽  
Author(s):  
S. A. Matemilola ◽  
W. J. Stronge
Keyword(s):  
Impact Damage ◽  
Fiber Composite ◽  
Pressure Vessels ◽  
Matrix Cracking ◽  
Burst Pressure ◽  
Carbon Fiber Composite ◽  
Vessel Wall Thickness ◽  
Filament Wound ◽  
The Impact ◽  
Composite Pressure Vessels

Quasi-static and impact tests were conducted on filament-wound carbon fiber composite pressure vessels to study factors that affect burst pressure. Observed damage included fiber microbuckling, matrix cracking, and delamination. Fiber microbuckling of the outer surface layer near the impact point was the main factor that reduced the burst pressure of the vessels. This type of damage was visually detectable on the surface. For similar levels of missile kinetic energy, the impact damage to filament-wound composite pressure vessels depends on size and shape of the colliding body in the contact area. Burst pressure for a damaged vessel decreases with the ratio of axial length of damaged fibers 1, to vessel wall thickness h, up to a ratio 1/h = 3; beyond this length of damaged section the burst pressure was independent of length of damage. Strain measurements near the region of loading showed that damage related to fiber microbuckling is sensitive to strain rate. At locations where impact damage was predominately due to fiber microbuckling, the failure strain was about six times the strain for microbuckling during quasi-static loading.

Intrinsic Mechanisms Limiting the Use of Carbon Fiber Composite Pressure Vessels

2016 ◽  
Vol 138 (6) ◽  
Author(s):  
Alain Thionnet ◽  
Anthony Bunsell ◽  
Heng-Yi Chou
Keyword(s):  
Carbon Fiber ◽  
Fiber Composite ◽  
Pressure Vessels ◽  
Load Level ◽  
Carbon Fiber Composite ◽  
Fiber Failure ◽  
Intrinsic Nature ◽  
Composite Failure ◽  
Fiber Breaks ◽  
Composite Pressure Vessels

The viscoelastic properties of the resins used in carbon fiber composite pressure vessels introduce time effects which allow damage processes to develop during use under load. A detailed understanding of these processes has been achieved through both experimental and theoretical studies on flat unidirectional specimens and with comparisons with the behavior of pressure vessels. Under steady pressures, the relaxation of the resin in the vicinity of earlier fiber breaks gradually increases the sustained stress in neighboring intact fibers and some eventually break. The rate of fiber failure has been modeled based only on physical criteria and shown to accurately predict fiber failure leading to composite failure, as seen in earlier studies. Under monotonic loading, failure is seen to be initiated when the earlier random nature of breaks changes so as to produce clusters of fiber breaks. Under steady loading, at loads less than that producing monotonic failure, greater damage can be sustained without immediately inducing composite failure. However, if the load level is high enough failure does eventually occur. It has been shown, however, that below a certain load level the probability of failure reduces asymptotically to zero. This allows a minimum safety factor to be quantitatively determined taking into account the intrinsic nature of the composite although other factors such as accidental damage or manufacturing variations need to be assessed before such a factor can be proposed as standards for pressure vessels.

Multi-Objective Optimization of Filament Wound Composite Pressure Vessels Based on Weight and Matrix Cracking/ Burst Pressure Using Imperialist Competitive Algorithm

2012 ◽  
Vol 234 ◽  
pp. 34-38
Author(s):  
Behzad Abdi ◽  
Yob Saed Bin Ismail ◽  
Ayob Amran ◽  
R.A. Abdullah ◽  
Mohd Yazid bin Yahya
Keyword(s):  
Imperialist Competitive Algorithm ◽  
Pressure Vessels ◽  
Matrix Cracking ◽  
Burst Pressure ◽  
Stacking Sequence ◽  
Filament Wound ◽  
The Matrix ◽  
Optimum Laminate Stacking Sequence ◽  
Filament Wound Composite ◽  
Wound Composite

The most important concern in design of filament-wound composite pressure vessels reflects on the determination of the optimum shape and optimum laminate stacking sequence of composite vessels based on the matrix cracking pressure and burst pressure of composite laminates. In this study the Imperialist Competitive Algorithm (ICA) is used to find the optimum laminate stacking sequence of composite vessels that the design considerations are stability and strength constraints. the matrix cracking pressure of filament-wound composite pressure vessels made of different number of helical layers and different layers of Circumferential layers was calculated by using orthotropic material formulae and then, the burst pressure of composite vessels was calculated by using netting analysis. The optimum laminate stacking sequence of filament winding composite was found to maximize the matrix cracking pressure and the burst pressure by using Imperialist Competitive algorithm.

Damage tolerance characterization of carbon fiber composites at a component level: A thermoset carbon fiber composite

2017 ◽  
Vol 52 (1) ◽  
pp. 37-46 ◽  
Author(s):  
Xiaosong Huang ◽  
Selina Zhao
Keyword(s):  
Carbon Fiber ◽  
Impact Damage ◽  
Fiber Composite ◽  
Energy Levels ◽  
Carbon Fiber Composites ◽  
Compression Tests ◽  
Carbon Fiber Composite ◽  
Component Level ◽  
Residual Properties ◽  
The Impact

This work focuses on the impact damage evaluation of a carbon fiber-reinforced thermoset composite at a component level (beams) as an effort to develop the service strategies for this class of materials. The beams were impact damaged at a variety of energy levels, and the pulse thermography nondestructive evaluation approach was used to characterize the damaged areas. The damaged beams were subjected to compression tests to evaluate their residual properties. As expected, both the beam maximum load and residual stiffness decreased with the increase in damage size. The damage growth rates under different load levels were investigated in fully reversed torsional fatigue tests. The fatigued beams were also characterized for their residual compression properties, which were then compared with those of the unfatigued beams. The results will be used to develop computer-aided engineering models to predict the residual strength and fatigue life of damaged composite components.

scholarly journals Damage Accumulation and Lifetime Prediction of Carbon Fiber Composite Pressure Vessels

2010 ◽  
Author(s):  
Anthony R. Bunsell ◽  
Franc¸oise Barbier ◽  
Alain Thionnet ◽  
Hasnae Zejli ◽  
Brian Besanc¸on
Keyword(s):  
Carbon Fiber ◽  
Damage Accumulation ◽  
Fiber Composite ◽  
Pressure Vessels ◽  
Elastic Behavior ◽  
Hydrogen Energy ◽  
Niche Markets ◽  
Carbon Fiber Composite ◽  
Near Term ◽  
Composite Pressure Vessels

Efficient storage of hydrogen is critical to the success of transition markets for hydrogen energy. For these near-term niche markets, high pressure compressed gas storage in carbon fiber composite pressure vessels is currently the most advanced and promising technology. However, challenges remain to improve performance and reliability while still insuring the safety of these pressure vessels in service over periods of 15 to 20 years. In order to avoid overdesign and conservative use, a fundamental understanding of damage mechanisms and degradation of these materials is required to fully exploit the potential of these materials. Acoustic emission has thus been used to characterize damage accumulation and its kinetics under static and cyclic loading in carbon fiber composite samples and pressure vessels. These experimental results were complemented by finite element modeling taking into account the elastic nature of the fibers, coupled with the visco-elastic behavior of the matrix and debonding at the fiber matrix interface.

Cold hydrogen delivery in glass fiber composite pressure vessels: Analysis, manufacture and testing

2013 ◽  
Vol 38 (22) ◽  
pp. 9271-9284 ◽  
Author(s):  
Andrew H. Weisberg ◽  
Salvador M. Aceves ◽  
Francisco Espinosa-Loza ◽  
Elias Ledesma-Orozco ◽  
Blake Myers ◽  
...  
Keyword(s):  
Glass Fiber ◽  
Fiber Composite ◽  
Pressure Vessels ◽  
Glass Fiber Composite ◽  
Composite Pressure Vessels

scholarly journals Falling Weight Impact Damage Characterisation of Flax and Flax Basalt Vinyl Ester Hybrid Composites

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 806 ◽  
Author(s):  
Hom Nath Dhakal ◽  
Elwan Le Méner ◽  
Marc Feldner ◽  
Chulin Jiang ◽  
Zhongyi Zhang
Keyword(s):  
Vinyl Ester ◽  
Failure Modes ◽  
Hybrid Composites ◽  
Impact Damage ◽  
Matrix Cracking ◽  
Damage Mechanisms ◽  
Pull Out ◽  
Weight Impact ◽  
Falling Weight ◽  
The Impact

Understanding the damage mechanisms of composite materials requires detailed mapping of the failure behaviour using reliable techniques. This research focuses on an evaluation of the low-velocity falling weight impact damage behaviour of flax-basalt/vinyl ester (VE) hybrid composites. Incident impact energies under three different energy levels (50, 60, and 70 Joules) were employed to cause complete perforation in order to characterise different impact damage parameters, such as energy absorption characteristics, and damage modes and mechanisms. In addition, the water absorption behaviour of flax and flax basalt hybrid composites and its effects on the impact damage performance were also investigated. All the samples subjected to different incident energies were characterised using non-destructive techniques, such as scanning electron microscopy (SEM) and X-ray computed micro-tomography (πCT), to assess the damage mechanisms of studied flax/VE and flax/basalt/VE hybrid composites. The experimental results showed that the basalt hybrid system had a high impact energy and peak load compared to the flax/VE composite without hybridisation, indicating that a hybrid approach is a promising strategy for enhancing the toughness properties of natural fibre composites. The πCT and SEM images revealed that the failure modes observed for flax and flax basalt hybrid composites were a combination of matrix cracking, delamination, fibre breakage, and fibre pull out.

Sign in / Sign up

Export Citation Format

Share Document