Pore flaws formed during the manufacturing process of wind turbine blades directly affect the basic mechanical properties of the overall structure. They decrease the load-carrying capacity and may lead to blade failure. The paper combines macro performance experiments and fine-scale model simulation and utilizes a multiscale analysis method predict the basic mechanical performance parameters of the main beam laminate for wind turbine blades. Firstly
through experimental study and numerical simulation
a fine-scale model of the carbon fiber main beam is established
the relationship between six mechanical property parameters and fiber volume content is obtained
and the validity of the numerical method used in this paper is verified. Furthermore
the fundamental material properties of a large tow carbon filament/epoxy main beam were predicted by utilizing the Monte Carlo approach to develop a model of a carbon fiber main beam with 0-10% pore flaws
assuming that the pore defects are randomly distributed in the matrix. While the other five mechanical property parameters (
and ) were significantly impacted by the pore content
with reduction rates approaching 11%
the fiber directional modulus of elasticity () proved to be insensitive to changes with pore content.
ZHANG J Y, XIE J, ZHAO X Z, et al.Influence of void defects on impact properties of CFRP laminates based on multi-scale simulation method[J]. International journal of impact engineering, 2023, 180: 104706.