Modeling and Analysis of Composite Laminates with Continuous Fiber around a Circular Hole

Abstract

The stress distribution of glass woven roving composites containing a cir cular hole was examined. Two types of circular hole, drilled and moulded-in, were con sidered. A finite element model which used the panel method to simulate the fiber con figuration was used in the stress analysis of laminates with moulded-in circular hole. Experimental verification of strain distribution to check the accuracy of the model is also conducted. The stress distributions of [0°], [90°], [0°/90°] s and [±45°]s laminates were investigated. Numerical results show that the stress distribution σy on laminates with a moulded-in hole is smaller than that with a drilled hole when loading in the fiber direc tion, but it is reversed when loading in the perpendicular direction. The fiber configura tions and strain distributions of numerical and experimental were compared. The results agree well.