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Keynote speech
Source: Keynote speech (by Prof. Leonard J. Bond)   Publish Time: 2015-05-21 21:21   638 Views   Size:  16px  14px  12px
Keynote speech (by Prof. Leonard J. Bond)

From NDT to Prognostics: advanced technologies for improved quality, safety and reliability


Leonard J. Bond

Center for Nondestructive Evaluation (CNDE)

Department of Aerospace Engineering & Department of Mechanical Engineering

 Iowa State University, Ames, IA 50011, USA



Abstract

Nondestructive testing (NDT) is now considered to be a mature technology with a total market including both equipment and services, which was estimated to generate revenue of $ 3.77 B in 2013 and is expected to reach $ 6.88 B by 2020*.  Recent decades have seen a move from NDT to consider nondestructive evaluation (NDE) and now advanced diagnostics, material state awareness, which seeks to give materials characterization in addition to defect detection and prognostics. Many consider NDT to be expensive: no - it is the failure to inspect which is expensive, particularly when considered in terms of management of life-cycle costs.  

This speech will discuss the trends and transitions from a desire to find smaller defects to probabilistic and risk based assessments for prediction. Advanced monitoring includes managing allowable indications, (living with defects), while at the same time improving quality, safety and reliability throughout a product life cycle. Examples will show the benefits of how integration of NDE tools into processes and through the life-cycle, including structural health monitoring, is moving towards providing a capacity for proactive management of materials degradation. Such changes are moving quality assessment beyond simple implementation of NDT codes and standards. Application areas for growth are seen as being energy, transportation and aging infrastructure, and both new materials and manufacturing technologies.  It will be shown that there is a compelling need to provide new and improved measurement science and technology, together with appropriate methodologies, for the analysis, monitoring, protection and management of parts, systems and structures.   

A particular focus of discussion will be research activities in advanced diagnostics and prognostics in ultrasonic and opportunities for expansion of its field of application. Such advances and changes are complicated by the introduction of new materials, such as for composite aircraft and the use of embedded, continuous and real-time data evaluation, to give advanced diagnostics and prognostics.  Finally, some trends will be reviewed in terms of  where NDE is going, looking at its application: drivers of quality, safety, sustainability AND cost of ownership. The impacts of large data, the need for permanent records, better equipment, automation and robotics, as well as some integration into manufacturing  for process monitoring, measurement and control, including providing  material state and mechanical properties, for full characterization. These trends are driven by a merging of NDE, materials science and design, with increasing use of models. It will be shown how NDE will be used to minimize ownership costs and be fully integrated into engineering and product  life cycle, design for inspectability and monitoring, andquantification of uncertainty  in the ill-posed measurement problems, through to data use in prognostics.


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