Experimental data, validated against numerical results, supports the development of more effective turbine blades with longer fatigue life,
by A Raimondo · 2025 · Cited by 1 — This study presents a computationally efficient numerical methodology for simulating the progressive erosion of wind turbine blade surfaces
permission is required to reuse all or part of the article published by MDPI, including figures and tables. In this paper, we discuss the application of durability and damage tolerance analysis (DADTA) approaches to trailing edge service life prediction. DADTA is mandated in the aerospace sector to support airworthiness certification and to provide an updated life prediction of the structure based on the different stages of their service life. The current paper provides an extensive review of these methods and shows how these can be applied to the wind turbine blade industry, specifically for predicting the structural design life of the trailing edge of composite wind turbine blades. The review includes (a) defining wind turbine trailing edge failure modes, (b) trailing edge design procedures, and (c) a detailed discussion of the application of durability and damage tolerance analysis for trailing edge life prediction.
EXPECTED OUTCOMES The outcome of this meeting will be a document summarizing • Presentations from the participants • A framework for the DADT process for wind blades • Recommendations for changes to blade standard • Needed research activities to support standards updates • Formulation of inputs for the IEA Wind Strategic Plan's update 9 AGENDA Note: The agenda includes the links to the presentations uploaded on the IEA Wind platform Tuesday, June 12th (JABS 405) 12:00 PM Check-in and Badging 1:00 PM Introductions Doug Cairns, Montana State University Josh Paquette, Sandia National Laboratories 1:30 PM IEA Wind TCP and Task 11: Nadine Mounir, IEA Wind 1:45 PM Durability and Airworthiness Requirements of Civil Aerospace Products: Carey O'Kelley, Delta 2:30 PM Aerospace Experience in Durability and Damage Tolerant Design: Doug Graesser, NSE Composites 3:15 PM Break 3:30 PM Current (New) International Standard for Wind Blade Design and Manufacturing: IEC 61400-5 (PT5): Derek Berry, NREL 4:15 PM Day 1 Wrap-Up 6:00 PM No-Host Social Event Wednesday, June 13th (JABS 405) 7:30 AM Breakfast 8:30 AM Manufacturing Process and Flaws: Steve Nolet, TPI Composites 9:30 AM The Importance of Damage Tolerance Analysis in Establishing Proper Inspection Oversight of Wind Turbine Blades: Dennis Roach, Sandia National Laboratories 10:30 AM Break 10:45 AM Manufacturing/Inspection Breakout Sessions (Led by Steve Nolet and Dennis Roach) 12:15 PM Lunch 1:15 PM Continuum and Discrete Damage Modeling Techniques of the Effects of Manufacturing Defects to Composite Structures: Doug Cairns, Montana State University 2:15 PM Multi-Scale Testing: Henrik Stang, Danish Technical University 3:15 PM Break 3:30 PM Multi-Scale Modeling/Testing Breakout Sessions (Led by Doug Cairns and Henrik Stang) 5:00 PM Day 2 Wrap-Up 6:00 PM No-Host Social Event 10 Thursday, June 14th (JABS 405) 7:30 AM Breakfast 8:30 AM Blade Rain Erosion: Raul Prieto, VTT 9:00 AM Wind Blade Repair Methods and Standards: Dayton Griffin, DNV-GL 9:30 AM Structural Health Monitoring and Operational Modifications: Josh Paquette, Sandia National Labs 10:00
# The challenges of wind turbine blade durability. Blade durability has become a significant challenge in wind turbine technology. During operations of wind projects, DNV has observed that wind turbine blades have transitioned from relatively low-maintenance components to the leading problem for some operators. ## Request a copy. This paper examines the factors that are contributing to this transition through the lens of broad trends across the life cycle of blades – design, manufacturing, transportation/handling, operations, and life extension – and synthesizes a perspective based on DNV’s experience providing technical support to owners, operators, and turbine manufacturers. Perspectives provided here are driven by a combination of observations made through DNV’s interactions with the industry, including seeing the commercial and contractual forces driving new projects, providing certification-related services, performing blade design reviews and blade manufacturing evaluations, observing operational damage from inspections, and investigating blade failures.
A **.gov** website belongs to an official government organization in the United States. # Blade and Drivetrain Testing Advance Wind Turbine Efficiency and Reliability. The Wind Energy Technologies Office (WETO) has funded the blade and drivetrain testing facilities since the 1990s, providing crucial knowledge and expertise to the ongoing expansion of commercial wind power—both domestically and globally. ### Blade Testing History at the National Renewable Energy Laboratory and Beyond. As international industry standards came into place, the U.S. Department of Energy’s (DOE) Wind Energy Technologies Office (WETO) supported the National Renewable Energy Laboratory (NREL) to develop the facilities, equipment, methods, and procedures for validating a wind turbine blade design and certifying its compliance with standards. In 1990, NREL commissioned its high bay testing facility at the National Wind Technology Center (NWTC). This facility was sufficiently large to accommodate blades of that era (less than 30 meters long) and included the ability to apply loads for blade-strength tests. NREL and industry engineers devised and demonstrated many testing innovations at this facility.
Advanced offshore blade design report: 25-30 year marine durability, smart monitoring systems, and cost-effective solutions.
Mark Forrest Mohammed Almoghayer 1 2 CONTENTS 1 Project Overview and Aims 5 2 Introduction 5 3 Review of Current Blade Manufacturing Processes 6 3.1 Manufacturing Process Overview 6 3.2 Review of Current Blade Manufacturing and State-of-the-Art 9 3.2.1 Vacuum Infusion 9 3.3 Current State-of-the-Art in Mould Production 10 3.3.1 Mould Design 10 3.3.2 Plug Fabrication 11 3.3.3 IntegralBlade Process 11 3.3.4 Innoblade Process 12 3.4 Review of Current Blade Structures and Materials 14 3.4.1 Fibres 14 3.4.2 Matrices 15 3.4.3 Sandwich Core Materials 17 3.4.4 Bonding Materials 19 3.5 Structural Applications 19 3.5.1 Basic Overview of Blade Structures 20 4 Optimised Reference Blade Design 22 4.1 Reference Blade Overview 22 4.2 Methods 23 4.2.1 Load simulations 23 4.2.2 Optimisation 23 4.2.3 FE modelling 25 4.3 Analysis of the baseline 25 4.4 Optimisation results 26 4.5 FE shell analysis of optimised blades 29 4.6 FE Optimisation of core thickness 31 4.7 Finalised Blade Design 34 4.7.1 Bill of Materials 34 4.7.2 Consumables 36 4.7.3 Other Inputs Required for Blade Life Cycle Assessment LCA 36 4.7.4 Energy Usage During Manufacture 39 4.8 Conclusions 40 3 5 Key Considerations for Low Carbon Manufacturing Opportunities 41 5.1 Background to Life Cycle Assessment 41 5.1.1 Life cycle impact assessment 41 5.1.2 Embodied Energy 42 5.2 LCA of Composites 44 5.2.1 Composite manufacture 44 5.3 LCA of Resins 46 5.3.1 Epoxy resins 46 5.3.2 Polyester Resin 46 5.3.3 Vinyl ester resins 47 5.4 LCA of