3 Rotor structure and materials

The following reports of Work Package 3 'Transmission and Conversion' will be available on this website shortly:

  Deliverable 3.1.2 Life cycle analysis of wind turbine materials - Inclusion of LCA data in the materials database NEW!

  Deliverable 3.1.3 Recommendations and procedures for qualification tests of materials and subcomponents NEW!

  Deliverable 3.1.4 Guidelines for design, stress analysis and testing of a structural blade detail NEW!

  Deliverable 3.1.6 Assessment of Fibre Bragg Grating optical strain sensors - Fatigue of specimens with embedded and surface-mounted sensors NEW!

  Deliverable 3.1.7 Randomising New Wisper - Development and implementation of a method for rainflow equivalent randomisation of variable amplitude sequences NEW!

  Deliverable 3.1.8 Experiments and modelling of influence and interaction of temperature and frequency on fatigue life NEW!

  Deliverable 3.2.1.Report A Computational damage model of fiber reinforced composites NEW!

 Deliverable 3.2.1.Report B Stiffness Degradation Models NEW!

  Deliverable 3.2.1.A Background theory and multipole expansion technique based code NEW!

  Deliverable 3.2.1.B Model and numerical study of the micro damage induced anisotropy NEW!

 Deliverable 3.2.1.C Model of fatigue micro damage in FR composite NEW!

  Deliverable 3.2.1.D Model of progressive partial/complete matrix-fiber debonding NEW!

  Deliverable 3.2.1.E Micromechanical fatigue strength theory of composite NEW!

  Deliverable 3.2.2.A SEM in-situ laboratory investigations on damage growth in GFRP composite under three-point bending tests NEW!

  Deliverable 3.2.2.B Damage growth in glass fiber reinforced polymer (GFRP) composite under tension-tension fatigue loads NEW!

  Deliverable 3.2.2.D Single fibre and multifibre unit cell analysis of strength and cracking of unidirectional composites NEW!

 Deliverable 3.2.3 Experimental validation of models NEW!

  Deliverable 3.2.3.A Environmentally assisted degradation of fiber reinforced polymer composites: a review

  Deliverable 3.2.3.B Micromechanics of diffusion induced damage evolution in reinforced polymers NEW!

Deliverable 3.2.3.C Low-cycle fatigue analysis of single-fibre cell model NEW!

  Deliverable 3.2.4 Development and testing of compressive damage model of polymer FRP NEW!

  Deliverable 3.3.1 Material model incorporating loss of strength and stiffness due to fatigue NEW!

 Deliverable 3.3.2 Probabilistic strength assessment of FRP laminates NEW!

  Deliverable 3.3.4 Verified material model incorporating progression of damag e due to static loading and the effect of fatigue on residual strength and stiffness (FADAS) NEW!

  Deliverable 3.3.6 Test results of in-plane mechanical properties for modeling complex stress states NEW!

  Deliverable 3.4.3 Scaling limits & costs regarding WT blades (connecting WP3 with WP1B4) NEW!

  Deliverable 3.3.5 Probabilistic Strength Assessment of Rotor Blades NEW!

ARTICLES IN PRESS

Kushch, V.I., Shmegera, S.V. and Mishnaevsky Jr., L (2008) Meso cell model of fiber reinforced composite: interface stress statistics and debonding paths, International Journal of Solids and Structures, Vol. 5 Issue 9 - May 2008 (ISSN 0020-7683)

Hayman, B., Wedel-Heinen, J. and Brøndsted, P. (2008) Materials challenges in present and future wind energy, MRS Bulletin, Vol. 33 April 2008

Brøndsted, P., Holmes, J.W. and Sørensen, B.F (2008) Wind rotor blades materials technology, European Sustainable Energy Review, issue 2- 2008

Mishnaevsky Jr, L. and Brøndsted, P. (2008) Three-dimensional numerical modeling of damage initiation in unidirectional fiber-reinforced composites with ductile matrix, Materials Science and Engineering - Elsevier, (doi:10.1016/j.msea.2007.09.105)

Mishnaevsky Jr, L. and Brøndsted, P. (2007) Modelling of fatigue damage evolution on the basis of the kinetic concept of strength, International Journal of Fractures (doi: 10.1007/s10704-007-9086-1)

Brøndsted, P., Lilholt, H. and Lystrup, A. (2005) Composite materials for wind power turbine blades, Annual Review of Materials Research, Vol. 35 - 2005 (doi: 10.1146/annurev.matsci.35.100303.110641)

Østergaard, R.C., Sørensen, B.F and Brøndsted, P. (2007) Measurement of interface fracture toughness of sandwich structures under mixed mode loadings, Journal of Sandwich Structures and Materials, Vol. 9 - Sept 2007 445 (DOI: 10.1177/1099636207070578)

REPORTS

Mishnaevsky Jr., L. and Brøndsted, P. (2007) Micromechanical modeling of strength and damage of fiber reinforced composites - Annual Report on EU FP6 project UpWind,Risø Report ex. 1601 - March 2007 (ISBN 978-87-550-3588-1)

Mishnaevsky Jr., L. and Brøndsted, P. (2007) Micromechanical modeling of unidirectional long fiber reinforced composites - introduction and basic training,Risø Report ex. 1234 - January 2007 (ISSN 0106-2840) 

PAPERS

Van Leeuwen, D.A., Nijssen, R.P.L., Westphal, T., Stammes, E. (2008) Comparison of static shear test methodologies; test results and analysis, China Wind Power & Global Wind Power 2008, Beijing 29-31 October 2008

Nijssen, R.P.L., González Canales A., Stammes, E. (2008) Subcomponent testing for wind turbine blades, China Wind Power & Global Wind Power 2008, Beijing 29-31 October 2008

Holmes, J.W., Sørensen, B.F, and Brøndsted, P. (2007) Reliability of wind turbine blades: an overview of materials testing, Wind Power Shanghai 1-3 November 2007

Mishnaevsky Jr., L. and Brøndsted, P. (2007) Software for automatic generation of 3D microstructural models of fiber reinforced composites with damageable elements, Risø Symposium 2007

Wang, H. Zhou, H. and Mishnaevsky Jr., L. Single Fiber and multfiber unit cell analysis of strength and cracking of unidirectional composites, International Journal of Fractures

Mishnaevsky Jr., L. and Brøndsted, P. Fiber bridging in GFRP composites: mesomechanical analysis, Stockholm

PRESENTATIONS*

Brøndsted, P., Holmes, J.W. and Sørensen, B.F (2008) Reliability of wind turbine blades, DMS 2008

Epoxy 11 Figures  

*For contributions of WP3 partners to the UpWind mid-term workshop and to the European Wind Energy Conferences 2007, 2008, and 2009, please see the News and Eventssection of this website.