Molding of Oriented Short-Fiber Composites. II. Flow through Convergent Channels,

摘要

Superior mechanical properties can be attained in a short fiber composite by using the flow in transfer or injection molding to align the fibers into the direction of highest stress. This is best accomplished in an elongational flow field,such as occurs in a converging channel. A model is derived to describe the changes in orientation distribution resulting from this flow. The author investigated the effects of the geometric,material,and processing variables on the orientation parameters of this model,the resulting orientation level and the tensile modulus of molded rods. (Author)