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Advanced Fiber Reinforced Plastics (FRP) have been increasingly used in various automotive applications, including side fender, body panel, and under-hood devices. The primary advantages include lightweight and high strength, therefore high ratios of strength and stiffness to weight. The strength/stiffhess of FRP is almost attributed to the fibers, since the polymeric matrix has negligible values in comparison to the fiber. Therefore it presents a challenging question as to whether a polymeric matrix is the optimal choice. In this paper, a cement-based matrix replacing polymer resin is developed to make thin sheet random short fiber and 3-D continuous fiber reinforced composites. Among the many advantages of cement based material, low cost and higher temperature resistance are the most attractive. In addition to mixing with short fibers, three-dimensional glass fiber fabrics, consisting of two biaxial woven fabrics, which are connected by vertical fibers are used. The height (or thickness) of the fabric can vary, ranging from 3 mm to 10 mm. Other thicker dimensions also are possible. The 3-D fabric is then impregnated with cement slurry to form a thin sheet composite plate. In our preliminary tests, very high flexural stress (43 MPa) and excellent ductility have been achieved with a low fiber content of approximate 7% by volume. With increasing fiber contents, even higher strength and ductility can be expected.
Advanced Fiber Reinforced Plastics (FRP) have been increasingly used in various automotive applications, including side fender, body panel, and under-hood devices. The primary advantages include lightweight and high strength, therefore high ratios of strength and stiffness to weight. The strength/stiffhess of FRP is almost attributed to the fibers, since the polymeric matrix has negligible values in comparison to the fiber. Therefore it presents a challenging question as to whether a polymeric matrix is the optimal choice. In this paper, a cement-based matrix replacing polymer resin is developed to make thin sheet random short fiber and 3-D continuous fiber reinforced composites. Among the many advantages of cement based material, low cost and higher temperature resistance are the most attractive. In addition to mixing with short fibers, three-dimensional glass fiber fabrics, consisting of two biaxial woven fabrics, which are connected by vertical fibers are used. The height (or thickness) of the fabric can vary, ranging from 3 mm to 10 mm. Other thicker dimensions also are possible. The 3-D fabric is then impregnated with cement slurry to form a thin sheet composite plate. In our preliminary tests, very high flexural stress (43 MPa) and excellent ductility have been achieved with a low fiber content of approximate 7% by volume. With increasing fiber contents, even higher strength and ductility can be expected.
Can cement composites be used in automotive applications?
Sind Zementverbundwerkstoffe für Automobilanwendungen einsetzbar?
Wu, H.C. (author)
2001
7 Seiten, 4 Bilder, 25 Quellen
Conference paper
English
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