Endurance of Mechanical Structures
Physical and Statistical Approaches
Published in September 1990
Book
Hardback
464 pages
978-0-444-98807-2 (ISBN)
Description
This book pays special attention to the safety and endurance of mechanical structures such as aircraft, bridges, nuclear reactors and other structures subject to stochastic loads, and to how safety and endurance relate to material properties, production technology and design philosophy. By "endurance", the authors understand the resistance of the structure to strength failures in critical zones of structural components. These failures are produced by fatigue damage processes in the broadest sense of the term. Emphasis is placed on the integration of physical and statistical approaches and large-scale testing of observational aspects, as well as on the dominant role of the probabilistic structure in the conceptual formulation of decision-making and life-estimating procedures for proving the serviceability (airworthiness, for example) of a new design. The book presents much practical and theoretical material based on experience with endurance problems in complex mechanical structures; this material was previously scattered throughout a variety of publications.
This book pays special attention to the safety and endurance of mechanical structures such as aircraft, bridges, nuclear reactors and other structures subject to stochastic loads, and to how safety and endurance relate to material properties, production technology and design philosophy. By "endurance", the authors understand the resistance of the structure to strength failures in critical zones of structural components. These failures are produced by fatigue damage processes in the broadest sense of the term. Emphasis is placed on the integration of physical and statistical approaches and large-scale testing of observational aspects, as well as on the dominant role of the probabilistic structure in the conceptual formulation of decision-making and life-estimating procedures for proving the serviceability (airworthiness, for example) of a new design. The book presents much practical and theoretical material based on experience with endurance problems in complex mechanical structures; this material was previously scattered throughout a variety of publications.
This book pays special attention to the safety and endurance of mechanical structures such as aircraft, bridges, nuclear reactors and other structures subject to stochastic loads, and to how safety and endurance relate to material properties, production technology and design philosophy. By "endurance", the authors understand the resistance of the structure to strength failures in critical zones of structural components. These failures are produced by fatigue damage processes in the broadest sense of the term. Emphasis is placed on the integration of physical and statistical approaches and large-scale testing of observational aspects, as well as on the dominant role of the probabilistic structure in the conceptual formulation of decision-making and life-estimating procedures for proving the serviceability (airworthiness, for example) of a new design. The book presents much practical and theoretical material based on experience with endurance problems in complex mechanical structures; this material was previously scattered throughout a variety of publications.
More details
Series
Language
English
Place of publication
Oxford
United Kingdom
Publishing group
Elsevier Science & Technology
Target group
College/higher education
Professional and scholarly
Dimensions
Height: 230 mm
ISBN-13
978-0-444-98807-2 (9780444988072)
Copyright in bibliographic data is held by Nielsen Book Services Limited or its licensors: all rights reserved.
Schweitzer Classification
Content
1. Introductory Notes. General. Methodology of testing large-scale structure components. Initial and boundary conditions of the cracking state of a mechanical structure. The notion of weak structural point. Delimiting the field of interest. Brief survey of studies concerning the statistical fatigue theory and its applications. Some historical remarks. Western Europe participation. Outside of Europe contribution. USSR participation. Czechoslovak participation. 2. Effect of Environmental Random Forces on Elastic Mechanical Structures. Statistical analysis of environmental effects on elastic mechanical structures. Environmental effects on an elastic aeroplane structure. Environmental effects data classification. Problems related to first order statistics of atmospheric turbulence data measured in flight. Problems related to second-order statistics of atmospheric turbulence data measured in flight. Passage of random processes through mechanical systems, considering both linear and nonlinear problems. Passage of random processes through: linear systems; nonlinear systems. Problems in modelling random environmental effects on mechanical structures. A study of a hybrid dynamic installation for fatigue testing of material and structure model specimens. A study of a hybrid dynamic installation for fatigue testing structural component. Problems of testing serviceability of large-scale mechanical structures. 3. Critical State of Bodies. Basic model of fractures in bodies. Principal findings ascertained by fractography. Initiation of cracks in bodies under cyclic loads. The process of fatigue cohesion failure of metals caused by mechanical stresses at elevated temperatures and creep. Temperature fatigue of metals. Contact fatigue of metallic bodies. Propagation of small cracks. Laws of propagation of developed fatigue cracks. Important effects having bearing on crack propagation under service conditions. Barriers to crack propagation. Effect of body size on fatigue properties. Final stage of sudden fracture formation. Application of findings relating to fatigue failure. Application of theoretical concepts of the initiation and propagation of fatigue cracks to welded joints and structures. Evaluation of service failures of welded locomotive frames and analysis of service data. Some additional aspects of the rate of damage accumulation. 4. Selected Statistical Problems in Mechanical Structure. Mechanical-structure strength problems related to quasi-state damage mechanisms. Mechanical structures: not involving cracks; involving fatigue cracks. Mechanical structure strength problems related to fatigue damage mechanisms. The safe-life (SL) design concept. The damage-tolerance (DT) design concept. References. Index.