Moisture absorption analysis of offshore wind turbine blade adhesive bonding under multi-environmental stresses

Abstract

Abstract Due to long-term serving in harsh environmental conditions with high temperature, high humidity, salt fog, etc., the structural performance degradation of adhesive bonding in wind turbine blades will easily occur. Considering that material moisture absorption is closely related to structural performance, a study on moisture absorption of bonded structures under multi-environmental stresses is performed in this paper. In particular, 3 environmental stresses, the temperature, aging time, and saline concentration, are considered. A series of environmental aging tests are conducted using the variable control method. The moisture absorption properties are analyzed. The performance degradation laws of the bonded structure under the effects of multi-environmental stresses are obtained. The results are meaningful for structural performance investigation of offshore wind turbine blade adhesive bonding.