Polat Sendur

Abstract: The main critical factors, which have direct influence on the fracture toughness and imapct strength properties of natural fibers composites, are reviewed in details in this paper. Considering the vast body of literature on the aforementioned subject, there are six main factors controlling these properties: (i) Intrinsic properties of the constituents related to packing arrangements, length, loading and orientation of the fibers; (ii) Type of physical and chemical treatment on natural fibers; (iii) Environmental conditions such as temperature and moisture; (iv) Material properties of reinforcing fiber and hosting resin, which constitute the natural composites; (v) The type of hybridization of natural composites such as self-hybridization based on same natural fiber and hybridization of natural fiber with another natural or synthetic fibers; (vi) Type of nano reinforcements, which is used to improve the fracture toughness of natural composites at nano and micro scale levels. Among the aforementioned factors, it is found out that the most critical factors affecting the fracture toughness and impact strength of natural composites are the type of physical and chemical treatments used to improve interfacial adhesion at fiber-matrix interface and the type of hybridization process.

TL;DR: The complex modal characteristics of different TPMS types suggest that they can be jointly used to meet the ever-challenging design requirements using the modeling guidelines proposed in this study.

TL;DR: In this article, the frequency response predictions of a finite element-based model of the gyroid sandwich structure were first validated against the modal testing in terms of its natural frequencies and mode shapes using the Dewesoft software.