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Über dieses Buch

This is the first book presenting dynamic responses and failure of polymer composite structures as they interact with internal and/or external fluid media. It summarizes authoritative research carried out by the author in the past decade on various aspects of Fluid-Structure Interaction (FSI) to present important effects of FSI on composite structures. The topics include impact loading on composite structures with air-back, water-back, or containing water; FSI effects on frequencies, mode shapes, and modal curvatures; cyclic loading for fatigue failure with FSI; coupling of independent composite structures by fluid media; and moving composite structures in water. Numerical techniques for FSI are also presented. Research was conducted both experimentally and numerically to complement each other. The book offers a timely, comprehensive information to fluid-structure interaction of composite structures for students, researchers or practicing engineers.

Inhaltsverzeichnis

Frontmatter

Chapter 1. Introduction

Abstract
Composite materials have been used increasingly for engineering applications, especially for load-carrying structural members. Additionally, composite materials have been extended for marine applications where both structures and fluids interact during their dynamic motions. This chapter provides a brief introduction of composite materials as well as fluid-structure interaction. Then, the scope of the book is presented at the end.
Young W. Kwon

Chapter 2. Experimental Study of FSI with Impact Loading

Abstract
While low velocity impact is not a major concern for most metallic structures, it has received a broad attention to polymer composite structures because such impact loading may cause internal damage to composite structures, resulting in their unexpected premature failure as load-carrying members.
Young W. Kwon

Chapter 3. Numerical Modeling of FSI Under Dynamic Loading

Abstract
Numerical analyses of FSI problems subjected to dynamic loading require coupling of two different solvers; one for the fluid domain and the other for the structural domain. There are multiple techniques to solve structural problems.
Young W. Kwon

Chapter 4. FSI Effect on Frequencies, Mode Shapes, and Modal Curvatures

Abstract
When a structure moves dynamically inside a fluid medium, there is an added mass effect. The added mass influences the vibrational frequency of the structure. This effect is significant for polymer composite structures in water. This chapter investigates the effect of FSI on vibrational frequencies, mode shapes, and modal curvatures of composite structures. Both experimental and numerical studies were undertaken.
Young W. Kwon

Chapter 5. FSI Study with Cyclic Loading

Abstract
Fatigue failure is one of the most common failure modes for structures. This is also true for composite structures that are in contact with water. This chapter presents the experimental results of composite structures subjected to cyclic loading while they were under water (Kwon et al. in Exp Mech 56(4):645–652, 2016, [1]). Then, a numerical study was also conducted to further explain the test results (Kwon in Appl Compos Mater 21(1):227–245, 2014, [2]).
Young W. Kwon

Chapter 6. FSI Study of Structures Containing Fluid

Abstract
Some structures contain fluids internally. One of the examples is a fluid tank. When such structure is subjected to dynamic loading, FSI occurs for the system. Hydrodynamic ram is one of the phenomena as a projectile penetrates into a structure such as a fuel tank. This chapter investigated the dynamic responses of composite structures containing different amounts of water while the structures were impacted by mechanical loading [1].
Young W. Kwon

Chapter 7. Structural Coupling by FSI

Abstract
Independent structures do not interact each other unless there is a mechanism to couple their responses. One of the coupling mechanisms is a fluid medium. Dynamic response of a structure (called the primary structure) can be transferred to a neighboring structure (called the secondary structure) through a fluid medium, especially when the fluid is water. Then, the secondary structure responds to the motion of the primary structure. Conversely, the response of the secondary structure also influences the dynamic response of the primary structure. As a result, both structures influence each other through FSI.
Young W. Kwon

Chapter 8. Composite Structures Moving in Fluids

Abstract
Many structures such as ships move in fluids while other structures such as offshore structures are surrounded by moving fluid. In both cases, the structures are subjected to fluid loading and can experience FSI. In addition, the fluid may contain solid objects such as floating icebergs in oceans. As a ship navigates in such an environment, there are multiple interactions among a structure, fluid, and floating solid objects. This chapter presented those topics.
Young W. Kwon
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