Civil Engineering Association

Fatigue and Fracture Reliability Engineering

ABOUT THIS BOOK

Fatigue and Fracture Reliability Engineering is an attempt to present an integrated and unified approach to reliability determination of fatigue and fracture behaviour, incorporating probability, statistics and other related areas.

A series of original and practical approaches, are suggested in Fatigue and Fracture Reliability Engineering, including new techniques in determining fatigue and fracture performances. It also carries out an investigation into static and fatigue properties, and into the failure mechanisms of unnotched and notched CFR composite laminates with different lay-ups to optimize the stacking sequence effect. Further benefits include:

a novel convergence-divergence counting procedure to extract all load cycles from a load history of divergence-convergence waves;
practical scatter factor formulae to determine the safe fatigue crack initiation and propagation lives from the results of a single full-scale test of a complete structure; and
a nonlinear differential kinetic model for describing the dynamical behaviour of an atom at a fatigue crack tip.
Fatigue and Fracture Reliability Engineering is intended for practising engineers in marine, civil construction, aerospace, offshore, automotive and chemical industries. It is also useful reading for researchers on doctoral programmes, and is appropriate for advanced undergraduate and postgraduate programmes in any mechanically-oriented engineering discipline.

Content Level » Research

Keywords » Fatigue Reliability - Fatigue Reliability Analysis - Fracture Reliability - Reliability Design - Reliability Engineering

Related subjects » Mechanical Engineering - Physical & Information Science - Production & Process Engineering - Special types of Materials

TABLE OF CONTENTS
1. Deterministic Theorem on Fatigue and Fracture.- 2. Reliability and Confidence Levels of Fatigue Life.- 3. Principles Underpinning Reliability based Prediction of Fatigue and Fracture Behaviours.- 4. Data Treatment and Generation of Fatigue Load Spectrum.- 5. Reliability Design and Assessment for Total Structural Life.- 6. Reliability Prediction for Fatigue Damage and Residual Life in Composites.- 7. Chaotic Fatigue.

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Fatigue and Fracture Reliability Engineering

It has been reported that [1, 2] 80–90% of failures in load bearing structures are related to fatigue and fracture. Therefore, fatigue reliability analyses now are widely used to underpin design for safe operation of such artefacts. Fatigue loading on engineering structures results in the onset of damage which, from time to time, will require repair. This can be expensive if the structure/artefact has to be taken out of service for the repair to be effected. Occasionally, if the damage is not identified at an early stage, there is a likelihood of sudden, catastrophic failure. Thus it is important to determine, as precisely as possible, the service life and inspection periods in order to ensure safety. From practice, it is proved that because of the random nature of external loading on structure and the internal heterogeneity of the structural material and manufacturing variabilities, for the same style of structure under the same load conditions, the full-lives display large variations. Thus, it is difficult for a deterministic methodology to evaluate the service life of the product sample and to include the randomness above mentioned. Thus also there is a need for probabilistic approaches through a combination of probabilistic statistics and mechanics.

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