Boundary Element Method for the dynamic evolution of intra-tow voids in dual-scale fibrous reinforcements using a Stokes–Darcy formulation

摘要: Abstract The Boundary Element Method (BEM) is implemented in the simulation of compression, displacement, migration and splitting intra-tow voids dual-scale fibrous reinforcements. last three processes have not been simulated at mesoscopic scale previous works due to consideration a constant pressure channels Representative Unitary Cell. In this work, both tows are modeled using Stokes Darcy equations, respectively, gradient prescribed along fluid motion, full air compressibility deemed, thereby allowing consider these processes. void process from weft towards channel analyzed terms ratio between average velocity liquid velocity, normalized rate channel. According BEM results, bubble can migrate lower higher velocities with respect removal out occur after several stages compression–displacement–migration–splitting; additionally, breaks up cycles expansion compression. results also show that surface tension, important influence process.