Teaching Responsibility
LJMU Schools involved in Delivery:
LJMU Partner Taught
Learning Methods
Lecture
Practical
Tutorial
Module Offerings
6511USST-JAN-PAR
Aims
To enable students to develop an understanding of the performance of materials and structures subjected to load in terms of deformation based failure, fracture and fatigue.
Learning Outcomes
1.
Apply deformation based structural integrity analysis.
2.
Apply fracture and fatigue based structural integrity analysis.
3.
Evaluate and apply software tools to predict failure.
Module Content
Outline Syllabus:Deformation Based Failure
Plastic Deformation
Basic plasticity, review of yield criteria, von-Mises, Tresca, yield locus – 2D and 3D representation.
Post yield behaviour, hardening rules, elastic perfectly plastic, elastic linear strain hardening.
Application to beams in bending, shape functions, plastic collapse, limit loads.
Application to pressure vessels, bursting of thin walled vessels, bursting of thick walled vessels.
Application to the bursting of spinning discs.
Buckling
Review of basic theory for struts, extension to deep walled beam sections and thin walled tubes under torsional loading.
FEA methodology for bucking, eigenvalue extraction.
Creep Deformation
The classical creep curve, creep mechanisms, stages of creep, creep (Arrhenius) equation, effects of temperature and applied stress, creep testing.
Fatigue and Fracture
Linear Elastic Fracture Mechanics
Stresses at a crack tip, energy approach, stress intensity factor approach, effects of finite geometry, compendia solutions.
Crack tip plasticity, effects of material thickness on fracture.
LEFM testing.
Elastic Plastic Fracture Mechanics
J integral, effects of constraint.
Failure assessment diagrams, application to real structures
EPFM testing
Finite Element Analysis of Fracture
Modelling stress singularities, the need for crack tip elements, determination of K and J, use of software.
Fatigue
Review of high cycle fatigue, S-N curve approach, mechanisms of fatigue, crack initiation and growth, Paris law and LEFM approach to fatigue.
Non-destructive testing methods.
Additional Information:The module will provide students with an in depth understanding of structural integrity and the assessment of materials and structures under load.
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