One of the most exciting areas of composites research is the development of modeling techniques to predict the response of composite materials to different forms of stress. In this book modeling approaches range from the micron to the meter in scale, and the authors explore the strengths and weaknesses of each particular model. A variety of material types from laminates and fiber-reinforced composites to monolithic and sandwich composites are discussed and a range of stress types and stress responses, from fracture and impact to wear and fatigue, are analyzed.