Modeling multiple failures of composite box beams used in wind turbine blades

Xiao Chen*, Jing Tang, Ke Yang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Large composite structures, such as composite wind turbine blades, may exhibit multiple failure modes that challenge the modeling strategies and methodologies designers adopt in finite element (FE) analysis. This study develops a comprehensive and general FE modeling method to simulate interactive failure process of composite box beams used in wind turbine blades. The composite box beams are the primary loading-carrying members and could show different failure modes due to competing failure mechanisms. A continuum-damage mechanics based progressive failure analysis approach is developed in three-dimensional stress/strain domain to simulate failure behavior of the box beams. Structural nonlinearities associated with geometry, materials and contact are included. The material failures considered in this study are composite failure with three material failure modes, foam core crushing and adhesive failure. The in-plane shear stress versus strain relation of unidirectional composites is included in the material damage model. Comprehensive comparisons are made between numerical simulations and experimental observations with respect to strain response, ultimate loads, failure modes and failure progress. The modeling approach is found to be capable of predicting both strength and failure of box beams with reasonable accuracy and it exhibits great potential to predict failure response of composite wind turbine blades.

Original languageEnglish
JournalComposite Structures
Volume217
Pages (from-to)130-142
Number of pages13
ISSN0263-8223
DOIs
Publication statusPublished - 2019

Keywords

  • Competing failure mechanisms
  • Debonding
  • Delamination
  • Foam crushing
  • Fracture
  • Progressive failure
  • Shear nonlinearity

Cite this

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title = "Modeling multiple failures of composite box beams used in wind turbine blades",
abstract = "Large composite structures, such as composite wind turbine blades, may exhibit multiple failure modes that challenge the modeling strategies and methodologies designers adopt in finite element (FE) analysis. This study develops a comprehensive and general FE modeling method to simulate interactive failure process of composite box beams used in wind turbine blades. The composite box beams are the primary loading-carrying members and could show different failure modes due to competing failure mechanisms. A continuum-damage mechanics based progressive failure analysis approach is developed in three-dimensional stress/strain domain to simulate failure behavior of the box beams. Structural nonlinearities associated with geometry, materials and contact are included. The material failures considered in this study are composite failure with three material failure modes, foam core crushing and adhesive failure. The in-plane shear stress versus strain relation of unidirectional composites is included in the material damage model. Comprehensive comparisons are made between numerical simulations and experimental observations with respect to strain response, ultimate loads, failure modes and failure progress. The modeling approach is found to be capable of predicting both strength and failure of box beams with reasonable accuracy and it exhibits great potential to predict failure response of composite wind turbine blades.",
keywords = "Competing failure mechanisms, Debonding, Delamination, Foam crushing, Fracture, Progressive failure, Shear nonlinearity",
author = "Xiao Chen and Jing Tang and Ke Yang",
year = "2019",
doi = "10.1016/j.compstruct.2019.03.018",
language = "English",
volume = "217",
pages = "130--142",
journal = "Composite Structures",
issn = "0263-8223",
publisher = "Elsevier",

}

Modeling multiple failures of composite box beams used in wind turbine blades. / Chen, Xiao; Tang, Jing; Yang, Ke.

In: Composite Structures, Vol. 217, 2019, p. 130-142.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Modeling multiple failures of composite box beams used in wind turbine blades

AU - Chen, Xiao

AU - Tang, Jing

AU - Yang, Ke

PY - 2019

Y1 - 2019

N2 - Large composite structures, such as composite wind turbine blades, may exhibit multiple failure modes that challenge the modeling strategies and methodologies designers adopt in finite element (FE) analysis. This study develops a comprehensive and general FE modeling method to simulate interactive failure process of composite box beams used in wind turbine blades. The composite box beams are the primary loading-carrying members and could show different failure modes due to competing failure mechanisms. A continuum-damage mechanics based progressive failure analysis approach is developed in three-dimensional stress/strain domain to simulate failure behavior of the box beams. Structural nonlinearities associated with geometry, materials and contact are included. The material failures considered in this study are composite failure with three material failure modes, foam core crushing and adhesive failure. The in-plane shear stress versus strain relation of unidirectional composites is included in the material damage model. Comprehensive comparisons are made between numerical simulations and experimental observations with respect to strain response, ultimate loads, failure modes and failure progress. The modeling approach is found to be capable of predicting both strength and failure of box beams with reasonable accuracy and it exhibits great potential to predict failure response of composite wind turbine blades.

AB - Large composite structures, such as composite wind turbine blades, may exhibit multiple failure modes that challenge the modeling strategies and methodologies designers adopt in finite element (FE) analysis. This study develops a comprehensive and general FE modeling method to simulate interactive failure process of composite box beams used in wind turbine blades. The composite box beams are the primary loading-carrying members and could show different failure modes due to competing failure mechanisms. A continuum-damage mechanics based progressive failure analysis approach is developed in three-dimensional stress/strain domain to simulate failure behavior of the box beams. Structural nonlinearities associated with geometry, materials and contact are included. The material failures considered in this study are composite failure with three material failure modes, foam core crushing and adhesive failure. The in-plane shear stress versus strain relation of unidirectional composites is included in the material damage model. Comprehensive comparisons are made between numerical simulations and experimental observations with respect to strain response, ultimate loads, failure modes and failure progress. The modeling approach is found to be capable of predicting both strength and failure of box beams with reasonable accuracy and it exhibits great potential to predict failure response of composite wind turbine blades.

KW - Competing failure mechanisms

KW - Debonding

KW - Delamination

KW - Foam crushing

KW - Fracture

KW - Progressive failure

KW - Shear nonlinearity

U2 - 10.1016/j.compstruct.2019.03.018

DO - 10.1016/j.compstruct.2019.03.018

M3 - Journal article

AN - SCOPUS:85062689365

VL - 217

SP - 130

EP - 142

JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

ER -