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Rhys Jones

Bio: Rhys Jones is an academic researcher from Monash University, Clayton campus. The author has contributed to research in topics: Paris' law & Stress intensity factor. The author has an hindex of 44, co-authored 378 publications receiving 7517 citations. Previous affiliations of Rhys Jones include DST Systems & Defence Science and Technology Organization.


Papers
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BookDOI
01 Jan 1988
TL;DR: In this article, the authors present a detailed analysis of adhesive-bonded repairs for thin sheet metal construction and apply them to composite aircraft structures, including the Mirage III lower wing skin.
Abstract: 1. Introductory chapter.- 1.1 Bonded vs bolted repairs.- 1.2 Combined bonded/bolted repairs.- 1.3 Adhesives.- 1.4 Adhesive testing.- 1.5 Surface preparation.- 1.6 Environmental behaviour.- 1.7 Summary.- 2. Surface treatments for bonded repairs of metallic components.- 2.1 Introduction.- 2.2 Background.- 2.3 Structural aluminium alloys.- 2.4 Phosphoric acid anodizing.- 2.5 Chromic acid anodizing.- 2.6 Titanium alloys.- 2.7 Summary.- 3. Design and analysis of bonded repairs for metal aircraft structures.- 3.1 Introduction.- 3.2 Design of adhesive bonded repairs in thin sheet metal construction.- 3.3 Residual strength of flawed or damaged bonded joints.- 3.4 Acceptance criteria for bonded flaws and damage.- 3.5 The pitfalls of life prediction for adhesive-bonded joints.- 3.6 Surface preparation for adhesive bonded repair of metal structure.- 3.7 Conclusions.- 4. Crack patching: design aspects.- 4.1 Introduction.- 4.2 The finite element formulation.- 4.3 Repair of cracks in Mirage III lower wing skin - a design study.- 4.4 Neutral axis offset effects.- 4.5 Initial design procedures.- 4.6 Comparison with experimental and 3-D results.- 4.7 Repair of semi elliptical surface flaws.- 4.8 Repair of cracked holes.- 4.9 Repair of cracked fastener holes.- Appendix A.- 5. Theoretical analysis of crack patching.- 5.1 Introduction.- 5.2 Formulation and notation.- 5.3 Load transfer to bonded reinforcements.- 5.4 Two stage analytical solution.- 5.5 Residual thermal stress due to adhesive curing.- 5.6 Bending effects.- 5.7 Partial reinforcement.- 5.8 Conclusion.- 6. Crack patching: experimental studies, practical applications.- 6.1 Introduction.- 6.2 Adhesive system and process selection.- 6.3 Thermal and residual stress problems.- 6.4 Design correlations and materials allowables.- 6.5 A preliminary design approach.- 6.6 Crack propagation behaviour.- 6.7 Applications of crack patching.- 7. Repair of composite aircraft.- 7.1 Introduction.- 7.2 Composite fabrication.- 7.3 Defects.- 7.4 Repair materials.- 7.5 Bonded repair - composite repair concepts.- 7.6 Effect of moisture on bonded repairs of composites.- 7.7 Design of bonded repairs.- 7.8 Composite service damage experience.- 7.9 Specific component repair.- 7.10 Future requirements.

443 citations

Book
23 Jan 2003
TL;DR: The availability of efficient and cost-effective technologies to repair or extend the life of aging military airframes is becoming a critical requirement in most countries around the world, as new aircraft becoming prohibitively expensive and defence budgets shrink.
Abstract: The availability of efficient and cost-effective technologies to repair or extend the life of aging military airframes is becoming a critical requirement in most countries around the world, as new aircraft becoming prohibitively expensive and defence budgets shrink. To a lesser extent a similar situation is arising with civil aircraft, with falling revenues and the high cost of replacement aircraft. This book looks at repair/reinforcement technology, which is based on the use of adhesively bonded fibre composite patches or doublers and can provide cost-effective life extension in many situations. From the scientific and engineering viewpoint, whilst simple in concept, this technology can be quite challenging particularly when used to repair primary structure. This is due to it being based on interrelated inputs from the fields of aircraft design, solid mechanics, fibre composites, structural adhesive bonding, fracture mechanics and metal fatigue. The technologies of non-destructive inspection (NDI) and, more recently smart materials, are also included. Operational issues are equally critical, including airworthiness certification, application technology (including health and safety issues), and training. Including contributions from leading experts in Canada, UK, USA and Australia, this book discusses most of these issues and the latest developments. Most importantly, it contains real histories of application of this technology to both military and civil aircraft.

211 citations

Journal ArticleDOI
TL;DR: In this article, the effect of impactor shape on the impact response of thin woven carbon/epoxy laminates was investigated using a drop weight test rig, using steel hemispherical, ogival and conical impactors, all 12mm in diameter.

184 citations

Journal ArticleDOI
TL;DR: In this paper, the authors examined the fatigue crack growth histories of a range of test specimens and service loaded components and concluded that in all cases, the crack growth shows, as a first approximation, a linear relationship between the log of the crack length or depth and the service history (number of cycles).

152 citations

Journal ArticleDOI
TL;DR: In this paper, the present status of the damage tolerance approach for composites and critical issues as they relate to the problem of delamination damage, an aspect of primary concern, are briefly discussed and a unified theoretical approach is proposed.

135 citations


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Posted Content
TL;DR: Deming's theory of management based on the 14 Points for Management is described in Out of the Crisis, originally published in 1982 as mentioned in this paper, where he explains the principles of management transformation and how to apply them.
Abstract: According to W. Edwards Deming, American companies require nothing less than a transformation of management style and of governmental relations with industry. In Out of the Crisis, originally published in 1982, Deming offers a theory of management based on his famous 14 Points for Management. Management's failure to plan for the future, he claims, brings about loss of market, which brings about loss of jobs. Management must be judged not only by the quarterly dividend, but by innovative plans to stay in business, protect investment, ensure future dividends, and provide more jobs through improved product and service. In simple, direct language, he explains the principles of management transformation and how to apply them.

9,241 citations

Journal ArticleDOI
TL;DR: An overview of various self-healing concepts for polymeric materials published over the last 15 years is presented in this article, where Fracture mechanics of polymeric material and traditional methods of repairing damages in these materials are described to provide context for the topic.

1,249 citations

Journal ArticleDOI
01 Mar 1970

1,097 citations

Journal ArticleDOI
TL;DR: In this article, a review of low-velocity impact responses of composite materials is presented, where major impact-induced damage modes are described from onset of damage through to final failure and the effects of composite's constituents on impact properties are discussed and post-impact performance is assessed in terms of residual strength.
Abstract: This paper is a review of low-velocity impact responses of composite materials. First the term ‘low-velocity impact’ is defined and major impact-induced damage modes are described from onset of damage through to final failure. Then, the effects of the composite's constituents on impact properties are discussed and post-impact performance is assessed in terms of residual strength.

1,058 citations

Journal ArticleDOI
TL;DR: Topology optimization is the process of determining the optimal layout of material and connectivity inside a design domain this paper, which is the same as the problem of finding the optimal configuration of a set of components.
Abstract: Topology optimization is the process of determining the optimal layout of material and connectivity inside a design domain. This paper surveys topology optimization of continuum structures from the year 2000 to 2012. It focuses on new developments, improvements, and applications of finite element-based topology optimization, which include a maturation of classical methods, a broadening in the scope of the field, and the introduction of new methods for multiphysics problems. Four different types of topology optimization are reviewed: (1) density-based methods, which include the popular Solid Isotropic Material with Penalization (SIMP) technique, (2) hard-kill methods, including Evolutionary Structural Optimization (ESO), (3) boundary variation methods (level set and phase field), and (4) a new biologically inspired method based on cellular division rules. We hope that this survey will provide an update of the recent advances and novel applications of popular methods, provide exposure to lesser known, yet promising, techniques, and serve as a resource for those new to the field. The presentation of each method's focuses on new developments and novel applications.

1,052 citations