15640 - Structural Diagnostics

Learning outcomes

The first aim of this course is to present a complete review of the failure mechanisms of materials. A further aim is to introduce the main methods for experimental stress analysis and for non-destructive tests.

Course contents

Non-destructive test methods: Penetrant liquids, Magnetic particles, Eddy Currents, Ultrasound inspection.

Experimental stress analysis by strain gauges. Determination of residual stresses by the Hole Drilling method: experimental procerdure and data processing by theoretical models, exercises and examples.

Low-cycle fatigue: cyclic hardening or softening, the cyclic curve, the hysteresis curve. Manson-Coffin model and rain-flow method.

Specific Lab exercitations on: dye penetrants, magnetic particles, eddy currents and ultrasound inspection. Relevant applications of strain guges and low-cycle fatigue.

Readings/Bibliography

Handouts by the Professor.

A. Freddi, G. Olmi, L. Cristofolini, Experimental Stress Analysis for Materials and Structures. Stress Analysis Models for Developing Design Methodologies, Cham (ZG), Switzerland, Springer International Publishing, 2015.

Teaching methods

Explanations by notes on a tablet. Practical exercitations and training in the Lab.

Assessment methods

Student assessment is performed by a written test, consisting of threequestions. They may have a theoretical or a practical content, with reference to the main Course topics (including practical applications of the studied experimental techniques).

Teaching tools

Slide projector. A tablet used as "virtual blackboard". Copies will be provided (by publication on virtuale.unibo.it) at the end of the lectures.

Some practical skills on: Strain gauges, Non-Destructive Control Techniques.

Office hours

See the website of Giorgio Olmi