A New Pair of Cumulative Fatigue Damage Models for Composite Materials

Mu, Peng; Wan, Xiao Peng; Zhao, Mei Ying

doi:10.4028/www.scientific.net/amr.160-162.226

Cited by 3 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…) When a laminate is subjected to certain fatigue loading, the material properties degradation may be reflected by the changes of stiffness and strength, and it is assumed that under the same damage state, the damage described by residual stiffness and by residual strength is completely equivalent, accordingly, a pair of cumulative fatigue damage models are developed to simulate damage evolution of overall life range in composites, these equations are presented in previous work [3]:…”

Section: Proposed Fatigue Damage Accumulation Modelmentioning

confidence: 99%

See 1 more Smart Citation

A New Approach to Fatigue Damage Modeling of Composite Laminates

Wan

Zhao

2011

AMR

Self Cite

View full text Add to dashboard Cite

Fatigue damage of composites can be described by the residual stiffness and residual strength, and the same damage state can be described by the two mechanical parameters equivalently. Based on this assumption, a new pair of fatigue damage accumulation models are established to simulate fatigue behavior and predict the fatigue life of composites. Each of two equations contains three parameters and has the similar form, and the power function relationships between the two damage indices are constructed. The proposed model, combining with constant life diagrams and failure criteria are used to estimate the fatigue life of composites, and good agreement is observed between the present model and experimental results.

show abstract

Section: Proposed Fatigue Damage Accumulation Modelmentioning

confidence: 99%

“…If unable to get the parameter m, may refer to the Ref. [3], m varies from 1.2 to 2.6 and an average value m=1.7 is suggested.…”

Section: Proposed Fatigue Damage Accumulation Modelmentioning

confidence: 99%

A New Approach to Fatigue Damage Modeling of Composite Laminates

Wan

Zhao

2011

AMR

Self Cite

View full text Add to dashboard Cite

show abstract

“…3,4 Generally, it is believed that the fatigue damage mechanisms of wind turbine rotor blade composites are very complicated, various forms of fatigue damage may appear during the fatigue process, such as matrix cracking, fiber/ matrix interface debonding and fiber fracture. 5 To avoid disastrous accidents, it is critical to predict fatigue life of wind turbine rotor blade under the random loads. Zhang et al 6 presented a fatigue life evaluation method for wind turbine rotor blade based on the multistage loading accumulative damage theory.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fatigue life prediction of wind turbine rotor blade composites considering the combined effects of stress amplitude and mean stress

Gao

Kou

2018

Proceedings of the Institution of Mechanical Engineers, Part O:

View full text Add to dashboard Cite

To predict fatigue life of wind turbine rotor blade composites under random loads, the combined effects of stress amplitude and mean stress are considered. First, the generalized s-N curved surface is introduced to characterize the fatigue properties of composites under constant amplitude cyclic load. Then, a modified Miner's rule is developed to reveal the evolution process of fatigue damage under variable amplitude cyclic loads. Finally, a fatigue life prediction model is presented based on the total probability formula and the modified Miner's rule, which can reflect the combined effects of stress amplitude and mean stress on fatigue life. The experimental data of wind turbine rotor blade composites are used to illustrate the specific process of the proposed method; the results indicate that the prediction values of the developed method are reasonable and effective.

show abstract

Residual strength assessment of wind turbine rotor blade composites under combined effects of natural aging and fatigue loads

Gao¹,

An²,

Ma³

et al. 2020

Eksploatacja i Niezawodność – Maintenance and Reliability

View full text Add to dashboard Cite

In this paper, the combined effects of natural aging and fatigue loads are considered to assess the residual strength of wind turbine rotor blade composites under actual service environments. Firstly, a comprehensive environmental factor (CEF) methodology is adopted to quantify the combined effects of environmental factors on residual strength. Meanwhile, the artificial accelerated aging test data are used to determine the weight coefficients of the CEF. Subsequently, a two-variable function is presented to characterize the relationship among residual strength, aging time and the CEF. The natural aging test data are utilized to estimate the unknown parameters of the two-variable function. Finally, the combined effects of natural aging and fatigue loads are considered, and a residual strength model is proposed to analyze the strength degradation behaviors of the wind turbine rotor blade composites. The results indicate that fatigue loads have negative effect on the residual strength, while natural aging has both positive and negative effects on the residual strength.

show abstract

A New Pair of Cumulative Fatigue Damage Models for Composite Materials

Cited by 3 publications

References 5 publications

A New Approach to Fatigue Damage Modeling of Composite Laminates

A New Approach to Fatigue Damage Modeling of Composite Laminates

Fatigue life prediction of wind turbine rotor blade composites considering the combined effects of stress amplitude and mean stress

Residual strength assessment of wind turbine rotor blade composites under combined effects of natural aging and fatigue loads

Contact Info

Product

Resources

About