The Defence Research Establishment, Valcatier (DREV) has been studying the application of composite materials for use in a lightweight anti-tank recoilless gun. Since thermoset resins are very sensitive to impact, it is important to determine the severity of damage using a nondestructive technique in order to establish the serviceability of the tube.

In this book, two kinds of analysis based on acoustic emission recorded during mechanical tests are investigated. In the first, individual, analysis, acoustic signature of each damage mechanism is characterized. So with a clustering method, AE signals that have similar shapes or similar features can be group together into a cluster. Afterwards, each cluster can be linked with a main damage. The second analysis is based on a global AE analysis, on the investigation of liberated energy, with a view to identify a critical point. So beyond this characteristic point, the criticality can be modeled with a power-law in order to evaluate time to failure.

This detail-oriented text is intended for engineers and applied mathematicians who must write computer programs to perform wavelet and related analysis on real data. It contains an overview of mathematical prerequisites and proceeds to describe hands-on programming techniques to implement special programs for signal analysis and other applications.

This open access book presents papers displayed in the 2nd International Conference on Energy and Sustainable Futures (ICESF 2020), co-organised by the University of Hertfordshire and the University Alliance DTA in Energy. The research included in this book covers a wide range of topics in the areas of energy and sustainability including: • ICT and control of energy;• conventional energy sources;• energy governance;• materials in energy research;• renewable energy; and• energy storage. The book offers a holistic view of topics related to energy and sustainability, making it of interest to experts in the field, from industry and academia.

Composites Evaluation contains the proceedings of the Second International Conference on Testing, Evaluation and Quality Control of Composites-TEQC 87, held at the University of Surrey, UK on September 22-24, 1987. The papers review the physical and chemical properties of composites and the testing and evaluation of these materials. This monograph is comprised of 29 chapters split into nine sections, organized around the themes of nondestructive testing, fatigue testing, impact testing, processing-property relationships, acoustic emission, fracture, mechanical tests, and specialized test equipment and assessment of in-service behavior. The first chapter deals with the nondestructive testing of welds in continuous carbon fiber reinforced thermoplastics, while the second focuses on the use of an automated coin-tap technique for the nondestructive testing of composite structures. The chapters that follow explore hysteresis measurement for obtaining characteristic quantities during dynamic fatigue; real-time recording of impact experiments on composite laminates; the use of statistical methods for determining design data for advanced composite materials; and the strain dependence of elastic modulus in unidirectional composites. The final chapter describes a methodical approach for studying and predicting polymer fiber composite serviceability influenced by cold climate factors. This text will appeal to mechanical and structural engineers as well as materials scientists and technologists.