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While plastics have many desirable properties, their relatively low stiffness and strength can limit their structural applications. However, this limitation can be overcome by forming composites in which the plastic matrix acts as a glue that holds stiffer and stronger fibers together. This chapter discusses several stiffening mechanisms, including the use of aligned fibers in advanced composites, and reinforcing materials such as small chopped fibers, flakes, and particulates in injection moldable compounds. Characteristics of the commonly used fibers, flakes, and particulates are also described. The chapter provides information on continuous and discontinuous fiber reinforcements. A practical means for estimating the stiffening effects of different types of filler types is provided by the Halpin–Tsai equations. These semi‐empirical equations are based on extrapolations of accurate solutions for simple filler geometries.
While plastics have many desirable properties, their relatively low stiffness and strength can limit their structural applications. However, this limitation can be overcome by forming composites in which the plastic matrix acts as a glue that holds stiffer and stronger fibers together. This chapter discusses several stiffening mechanisms, including the use of aligned fibers in advanced composites, and reinforcing materials such as small chopped fibers, flakes, and particulates in injection moldable compounds. Characteristics of the commonly used fibers, flakes, and particulates are also described. The chapter provides information on continuous and discontinuous fiber reinforcements. A practical means for estimating the stiffening effects of different types of filler types is provided by the Halpin–Tsai equations. These semi‐empirical equations are based on extrapolations of accurate solutions for simple filler geometries.
Stiffening Mechanisms
Stokes, Vijay K. (author)
Introduction to Plastics Engineering ; 199-213
2020-05-11
15 pages
Article/Chapter (Book)
Electronic Resource
English