Unit information: Residual Stress - Impact on Materials Performance in 2014/15

Unit name	Residual Stress - Impact on Materials Performance
Unit code	MENGM6050
Credit points	10
Level of study	M/7
Teaching block(s)	Teaching Block 2 (weeks 13 - 24)
Unit director	Professor. Smith
Open unit status	Not open
Pre-requisites	MENG33112, MENG33111 or equivalent
Co-requisites	None
School/department	Department of Mechanical Engineering
Faculty	Faculty of Engineering

Description including Unit Aims

This unit is split into two parts: in the 1st 10 lectures we consider advanced techniques used to simulate the creation of residual stresses in engineering materials, providing detailed theoretical solutions to their distribution in simple shapes using the underlying stress analysis methods developed throughout years 1 to 3 of the undergraduate course, particularly in Materials 1 and 2 (MENG11100 & MENG21100). We show that these solutions also provide a route to developing methods for measuring residual stresses for more complex shaped components. We also illustrate sophisticated techniques for measuring residual stresses.

In the 2nd set of 10 lectures we provide an understanding of how residual stress impacts on structural integrity of safety critical engineering components, including aspects covering fracture and fatigue mechanics. These topics require detailed background understanding from units MENG 33112 (Failure of Materials) and MENG 33111 (Finite Element analysis) or equivalent for H301 and H311 students. The students will also receive lectures from external industrial speakers to explain the challenges faced by industry in this field.

Aims:

The focus of this course is to provide M level students direct contact with the research challenges facing the stress analysis community when considering the impact of residual stresses on the structural integrity of safety critical engineering systems. Students will become familiar with advanced stress analysis method for predicting the development of residual stress in engineering materials and structures. The course will explain methods for quantifying residual stresses in practical engineering components and expose students to the advanced methods developed in fracture and fatigue mechanics that are subsequently used to quantify the impact of residual stresses on structural integrity.

Intended Learning Outcomes

By the end of the course the student will be able to do the following:

• Use advanced stress analysis methods to derive residual stress distributions and solve problems.

• Understand the requirements for predicting residual stresses in engineering components using finite element models.

• Be aware of the state of the art methods for measuring residual stress and understand the advantages and disadvantages of their application.

• Use known residual stresses to estimate their impact on the structural integrity of engineering materials.

• Interact with industrial and university research teams to understand research challenges faced by the Structural Integrity community.

Teaching Information

Students will receive a 2 hour lecture per week over the 2nd teaching block Included in the lectures will be external speakers to provide talks about the industrial and research context of the work. Groups will be expected to attend laboratory demonstrations on experimental methods. Examples of a standard similar to exam questions will be provided so that the students can work through them in their own time.

Assessment Information

There is a 2-hour written paper in the summer, which accounts for 100% of the marks.

Reading and References

Mechanical Behaviour of Materials, N. Dowling Prentice Hall, 2006

Theory of Elasticity, S.P Timoshenko and J.N Goodier, 1970