Long fibers reinforced composites

Zhou G, Movva S L and Lee J (2008), Nanoclay and long-fiber-reinforced composites based on epoxy and phenolic resins , J Appl Polym Sci, 108, 3720-3726. 

In recent developments of long-fiber-reinforced composites described by Prewo (1989), the toughness was increased to more than 8 MPa m -. In this case, however, the fiber pull-out properties from the matrix contributed to the increase in the toughness of the material. 

Fracture mechanical methods evaluate the propagation of cracks and damage in materials under dynamic load (crack or damage propagation tests). However, there are several objections to applying classic - linear elastic - fracture mechanical methods to long fiber-reinforced composites due to the heterogeneity and anisotropy of fiber composites [125] ... 

The development for fibers is even more complex. Hatta and Taya presented three similar equations to describe randomly oriented isotropic short-fiber reinforced composites, through the plane aligned but randomly oriented long-fiber reinforced composites, and in-plane aligned long-fiber reinforced composites [28]. The equations used to predict the thermal conductivity of an isotropic short-fiber reinforced composite are ... 

Sakai, M. (1995). Strengthening in long-fiber-reinforced composites, [in Japanese]. Journal of the Society of Materials Science (Japan), 44, 138-143. doi 10.2472/ jsms.44.138. 

For the remainder of this book, fiber-reinforced composite laminates will be emphasized. The fibers are long and continuous as opposed to whiskers. The concepts developed herein are applicable mainly to fiber-reinforced composite laminates, but are also valid for other laminates and whisker composites with some fairly obvious modifications. That is, fiber-reinforced composite laminates are used as a uniform example throughout this book, but concepts used to analyze their behavior are often applicable to other forms of composite materials. In many Instances, the applicability will be made clear as an example complementary to the principal example of fiber-reinforced composite laminates. 

Thomason, J. L., Long fiber reinforced polypropylene composites, presentation given at the Gordon Conference on Composites, Ventura, CA, 10-15 January, 1997. 

The first all-around automobile application of composite leaf-springs was made in the Sherpa 200 series van and mini buses built by Freight Rover. These fiber-reinforced plastic (FRP) components for high stress, high-temperature uses were developed by GKN. ICl s Verton, a long-fiber reinforced thermoplastic is also suitable for such applications. 

More recently, DiCarlo (1997) has compared ceramic composites to the best superalloy using the strength-to-density ratio versus the Larson-Miller parameter, q. In this analysis (Figure 3-25), the Nextel 720 fiber-reinforced composite is inferior to the metal in short-term fracture but comparable to the superalloy in long-term rupture. On this basis, the Hi-Nicalon fiber is superior to the superalloy except at short times and high stress levels, when fiber failure is dominated by slow... 

Interim storage of the fiber composite material is realized in a heat accumulator, from which it is discharged in cycles by a ram, chopped into molding compound units by a cutter at the end of the accumulator, and transported on a discharge belt. The plasticized material produced in this way is transferred into a compression mold, then formed into a structural component in an extrasion process. The finishing steps are the same as in other CM methods used for long fiber-reinforced thermoplastics. 

D.M. Bigg, Manufacturing methods for long fiber reinforced polypropylene sheets and laminates, ed. by J. KaigCT-Kocsis, in Polypropylene Structure, Blends and Composites. voL 3 (Chapman Hall, London, 1995), pp. 263-292... 

Important distinguishing properties of the composite materials are the shape of the reinforcement phase, such as long fibers, short fibers, and particle. Concerning the mechanical properties, the best results are achieved by long-fiber reinforcements. Since they are not economically feasible because of their complex manufacturing process, it is preferred to use short-fiber or particle reinforcements. They do not have the same resistance as the long-fiber reinforcement, but the potential gain of stiffness, resistance to wear, and other property improvement are usually sufficient and acceptable. 

A. R. Bhatti and P. M. Farries, Preparation of Long-fiber-reinforced Dense Glass and Ceramic Matrix Composites, in Carbon/carbon, Cement and Ceramic Matrix Composites, R. Warren, Ed., Elsevier Science Ltd., Oxford, (2000). p. 645-667. 

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