High rate response of elastomeric coatings for wind turbine blade erosion protection evaluated through impact tests and numerical models

Autor:	Kristine Munk Jespersen, Mohammadali Eftekhar, Nicolai Frost-Jensen Johansen, Jakob Ilsted Bech, Leon Mishnaevsky, Lars Pilgaard Mikkelsen
Rok vydání:	2023
Předmět:	Wind turbine blades Viscoelastic materials Mechanics of Materials Mechanical Engineering Automotive Engineering High strain rates Aerospace Engineering Ocean Engineering Leading-edge erosion Safety Risk Reliability and Quality Civil and Structural Engineering
Zdroj:	Jespersen, K M, Eftekhar, M, Frost-Jensen Johansen, N, Bech, J I, Mishnaevsky Jr., L & Mikkelsen, L P 2023, ' High rate response of elastomeric coatings for wind turbine blade erosion protection evaluated through impact tests and numerical models ', International Journal of Impact Engineering, vol. 179, 104643 . https://doi.org/10.1016/j.ijimpeng.2023.104643
ISSN:	0734-743X
Popis:	The high strain rate (above ~ 104/s) behavior of an elastomer is characterized using low strain rate (below ~ 101/s) dynamic mechanical thermal analysis and time–temperature superposition. This approach is validated using high strain rate ball impact experiments and finite element predictions of ball deformations and rebound speeds. The ball impact experiments are performed by shooting 6 mm rubber balls with a controlled impact speed of 50–170 m/s at steel and polyurethane targets. An explicit axisymmetric finite element model of the ball impact experiment is established in the commercial code Abaqus. The validated material properties are used to model the viscously dissipated energy and the corresponding temperature increase in the polyurethane target. The region with the largest dissipated energy in the target material is predicted to be in a ring around the impact center with a radius of approximately 1 mm. This region corresponds well to locations of early damage initiation observed in the impact fatigue experiments for similar materials. The predictions are confirmed by the observed temperature distributions using thermal camera imaging of the rubber ball impact experiment. The experimental setup was developed for impact fatigue testing of anti-erosion coatings for the leading-edges of wind turbine blades.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4176cd58f832c7b03a5c9cf85b226e0d https://doi.org/10.1016/j.ijimpeng.2023.104643 Zobrazit plný text záznamu Full Text from ScienceDirect