Sunil K. Sinha – författare

Impact Dynamics: A Numerical Approach enables safer aerospace and mechanical designs by providing state-of-the-art techniques and methodologies for impact simulation and crashworthiness analysis of critical structural components. It investigates the shock type of dynamic loading situations as a part of mechanical design discussions.Classical approaches to impact problems rely on purely empirical methods that correlate large amounts of experimental data; this approach, while useful for specific problems, often fails when extrapolating to design conditions outside the tested velocity ranges. In contrast, this book focuses on numerical simulations using current models to explain the underlying physics and demonstrate how this physics-based approach provides better insight into impact events and enables successful extrapolation of test data into new design spaces for handling complex industrial problems.This book will be useful to aviation safety professionals, researchers, and practicing aerospace and mechanical design engineers.

Accurate prediction of wastewater pipe structural and functional deterioration plays an essential role in the utility asset management process and capital investment planning. The key to implementing an asset management strategy is a comprehensive understanding and prediction of asset condition and performance.  The primary objective of this research is therefore to develop protocols and methods for predicting the remaining economic life of wastewater pipe assets. The limits of deterioration prediction capabilities are not in mathematical models or statistical analysis methods, but in lack of accurate and consistent data. This report presented the short-term phase-1 which has been completed with results from intensive literature reviews, various interviews with utilities, and pipe associations. In this phase, the research team investigated the life cycle of wastewater pipeline and identified the causes of pipe failure in different phases including design, manufacture, construction, operation and maintenance, and repair/rehabilitation/replacement. The research team has prepared various modes and mechanisms of pipe failure in wastewater infrastructure system as well as identified environmental and societal consequences of the failure. After reviewing all relevant reports and utility databases, the research team has developed a set of standard pipe parameter list (data structure) and pipe data collection methodology. The data structure has been classified into Gold, Silver, Bronze and Wood standard.