TU Delft
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2014/2015 Aerospace Engineering Master Aerospace Engineering
Holistic Structural Integrity Process
Responsible Instructor
Name E-mail
Dr. M.J. Martinez    M.J.Martinez@tudelft.nl
Name E-mail
Dr. C.D. Rans    C.D.Rans@tudelft.nl
Ir. M.J. Schuurman    M.J.Schuurman@tudelft.nl
Contact Hours / Week x/x/x/x
Education Period
Start Education
Exam Period
Course Language
Course Contents
The courses discusses a Holistic Structural Integrity Process (HolSIP) founded upon the primary idea that all failure mechanisms involved in the degradation of the structure are interconnected and should not be analyzed as merely the sum of individual mechanisms. In reality many failure mechanisms interact synergistically and are much more complex and challenging to understand, and thus the requirement for a holistic physics based analysis and design approach to structural integrity problems. The final goal of this holistic approach is to more accurately assess the reliability and structural integrity of aerospace and wind energy structures while maintaining and achieving higher safety conditions. The course is divided into the following topics:

Introduction to Holistic Structural Integrity Process (HolSIP): The need for a multi-disciplinary physics based lifing methodology.
Engineering Failures and the Lessons Learned. This section examines several engineering case studies to illustrate the potential synergistic interaction between failure modes and their catastrophic effects.
Variability in Initial and In-Service Conditions: This section will examine how variability in part-to-part conditions can affect their life and failure. For initial conditions, the effects of residual stresses, corrosion, wear, creep, and their combination will be examined. For in-service conditions, the variability in usage and resultant loading will be examined.
HolSIP as an umbrella to: Health Usage Monitoring (HUMS), Structural Health Monitoring (SHM), Prognostic Health Management (PHM) and Condition Based Monitoring Plus (CBM+). This section of the courses puts into context the different terminologies considered today by the scientific community as it relates to Structural Integrity (The word of the day!).
Direct and indirect measurements of loading spectra: This section of the course would consider the use of sensors (i.e. accelerometers, strain gauges) for determining the bending, moment and shear diagrams for a wing as an example. Indirect measurements techniques such as machine learning algorithms will also be considered.
Structural Health Monitoring as a damage detection technique: Strain Gauges, Fiber Optics, Piezoelectric Actuators and Sensors (Lamb Wave theory). The course will also highlight the link between the current NDI techniques and their corresponding Probability of Detection (POD) curves in the aerospace industry.
Future trends in HolSIP.
Study Goals
To provide the students with an overview of a new upcoming structural integrity philosophy and how this one is related to future aerospace and wind energy needs. The student will be exposed to Structural Health Monitoring, Load Monitoring and initial environmental factors affecting aging and new aerospace and wind energy structures.
Education Method
Traditional lectures and project based learning.
A 2-person team project that will be divided into:

Midterm progress update (10%)
Final report (60%)
Final presentation (30%).