Fatigue behavior of composite materials

Reifsnider, Kenneth L.

doi:10.1007/bf02265218

Cited by 99 publications

(45 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Reifsnider et al [1] [2] have described how the crack coupling process that takes place creates a fracture plane through the thickness of a fibrous composite material leading to rupture of the specimen at the global level through the formation of a "critical path". Under various applied field conditions, heterogeneous postulated that these techniques capture the change in material state and are sensitive to damage at the ending stages of life with the capability to detect imminent fracture.…”

Section: Introductionmentioning

confidence: 99%

Multiphysics Based Simulation of Damage Progression in Composites

Vadlamudi¹,

Raihan²,

Reifsnider³

2017

MSA

Self Cite

View full text Add to dashboard Cite

The long-term properties of continuous fiber reinforced composite materials are increasingly important as applications in airplanes, cars, and other safety critical structures are growing rapidly. Although a clear understanding has been established for initiation, growth and accumulation of damage, it is still unclear when and how the interactions of these local events lead to the development of a "critical" fracture path resulting in a sudden change of global properties and possible rupture. In the present paper, we simulate damage development in a neat polymeric resin using X-FEM analysis, and conduct concomitant dielectric response analysis with a COMSOL TM simulation model to study the collective defect structure as it develops in a model system. Our studies reveal inflection points in the predicted global dielectric response vs. strain that are related to changes in local damage growth rates and modes that clearly indicate impending fracture and capture the progressive change in material state.

show abstract

Section: Introductionmentioning

confidence: 99%

Multiphysics Based Simulation of Damage Progression in Composites

Vadlamudi¹,

Raihan²,

Reifsnider³

2017

MSA

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to Reifsnider (1991), when strength falls below a certain value, the useful life of the member in question is regarded to be over. Behaviour models based on a large number of tests provide a clearer view of these developments, which have been studied by Yang et al (1983), Reifsnider (1991 and Oller (2002), among others.…”

Section: Introductionmentioning

confidence: 99%

“…Behaviour models based on a large number of tests provide a clearer view of these developments, which have been studied by Yang et al (1983), Reifsnider (1991 and Oller (2002), among others. Their techniques call for destructive testing, however, in which degradation is difficult to monitor.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Strain analysis of a glass-fibre-reinforced polyester under dynamic loads

Bula

Vázquez

Vinssac

1970

Span. j. agric. res.

View full text Add to dashboard Cite

Strain on fibreglass-reinforced polyester was analysed for different types of stress-strain patterns to determine the existence of a critical point on the respective diagrams. This critical point defines the maximum strain value prior to a steep and abrupt increase that causes failure. «Useful life» should, therefore, be regarded to be the number of cycles associated with the critical point rather than the number associated with failure. The tests conducted in this study showed that the number of critical point cycles was around 95% of the yield point cycles. The degradation rate of the material tested under different loads was found with an analytical model applied to the most common strain pattern. The model proposed also showed that the stress ratio, R, was related to elastic modulus degradation. When studied for load state values of 10 to 16% of the ultimate tensile strength (UTS), material life expectancy was found to be 104 to 107 cycles. No fatigue limit appeared for these values, however. Immersion of the material in water and subsequent drying under ambient conditions was found not affecting either deformation or deformation-related variables. Finally, a model was developed to predict life expectancy from the maximum strain values.

show abstract

“…The fatigue mechanisms in composites are similar to those seen in metals as they both involve a fatigue crack initiation and crack propagation phase. However, the fatigue crack initiation and crack propagation phases in composites are very dissimilar due to their complicated micro-mechanical process [10].…”

Section: Fatigue Behavior Of Compositesmentioning

confidence: 99%

Effects of Damage Arrestment Devices on the Fatigue Life of Impacted Composite Sandwich Beams

Wood¹

View full text Add to dashboard Cite

The use of composite sandwich panels is rapidly increasing in the aerospace industry. In these applications, thin composite face sheets are typically co-cured to foam or honeycomb cores. One of the greatest concerns in these types of applications is face-core delamination because it can ultimately lead to catastrophic failure of the structure. Further, the effects of foreign object damage on composite sandwich structures are often catastrophic. Damage to the structure is often undetectable through visual inspection, leading to concerns of unknown interlaminar damage through the life of the structure, which can cause a catastrophic failure. This research determines the effectiveness of a damage arrestment device (DAD) on the structural integrity of composite sandwich beams. The effects of these DADs on the fatigue life of these beams following a low-velocity impact will be considered.Composite sandwich beams were constructed utilizing two layers of Advanced Composite Group LTM45EL/CF1803 bi-directional woven carbon fiber face sheets with a General Plastics Last-A-Foam FR-6710 rigid polyurethane core, and were cured utilizing an autoclave.Static 4-point bend testing following the ASTM standard D6272 was investigated to determine the flexural behavior of composite sandwich beams. Six different beam cases, with dimensions 1-inch wide by 11.75-inch long, were investigated. The cases considered were beams with and without initial delamination and also, with DAD keys placed transversely and longitudinally with and without delamination. A drop test was employed to simulate a low-velocity impact to the composite sandwich beams with and without delamination. The flexural behavior of these two cases was determined and used in fatigue testing. Experimental results showed that the addition

show abstract

Fatigue behavior of composite materials

Cited by 99 publications

References 12 publications

Multiphysics Based Simulation of Damage Progression in Composites

Multiphysics Based Simulation of Damage Progression in Composites

Strain analysis of a glass-fibre-reinforced polyester under dynamic loads

Effects of Damage Arrestment Devices on the Fatigue Life of Impacted Composite Sandwich Beams

Contact Info

Product

Resources

About