SD2413 Fibre Composites - Analysis and Design 6.0 credits

Fiberkompositer- analys och design

The course aims to give the student theoretical and practical knowledge of composite materials. The main part of the course deals with theoretical principles which are then put into practice in a design assignment and a computer exercise.

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Course information

Content and learning outcomes

Course contents *

This course deals with the theory, analysis and design of fibre reinforced composite materials. Composite materials, e.g. carbon fibre composites, are highly efficient materials for structural applications enabling substantial weight savings and thereby reduced energy consumption and environmental impact for especially vehicles such as a cars, trucks, airliners, ships and trains. A composite material is built up of two or more constituents; a fibre phase and a matrix phase. The architecture is such that enables tailoring of properties by utilising the stiff and strong fibre in the directions where they are most useful. However, this creates an anisotropic material which requires special treatment in its analysis and design.

In this course we develop the theory for composite laminates in order to predict stiffness and strength properties. We develop a special computer code for its application to general types of laminates. We then extend this to study composite plates. We also study some other special features of composite laminates including an overview of how to use FEM when designing composite structures. At the end of the course an open-ended design problem is solved in order to train engineering skills. Industrial relevance of the course contents are provided by guest lectures from industry.

Intended learning outcomes *

After completing course the student shall be able to

  • Explain the mechanical behaviour of anisotropic materials and how they differ from classical construction materials
  • Apply classical lamination theory to analyse the stiffness and strength of composite laminates
  • Design a composite laminate with given requirements
  • To formulate and solve a composites design problem and communicate and defend the results orally

For higher grades, the student shall also

  • Be able to analyse composite plates subjected to various loads
  • Be familiar with methods for more advanced tools of composites analysis and design including failure theories and their implementation, the effect of holes, fatigue, and models for the prediction of compressive failure mechanisms and describe potential problems and ways to analyse composite structures with FEM.

Course Disposition

This course has a classical (or if you like – old fashioned) setup. The lectures are given mainly on the white-/black board presenting theory combined with solving examples. The theory development is following a quite straight forward evolution in the first half of the course. The first part of the home work problem follows exactly the same evolution so the theory and the computer code are very much parallel. The pedagogic idea is thus that the computer exercise is a way to learn the theory. It also gives the student a very powerful aid for problem solving.

The second part of the course is more an overview of important aspects of the mechanics of composite materials. The theory is still given by lectures but there is less training by problem solving. Training in synthesising and design is provided in the design problem.

Literature and preparations

Specific prerequisites *

Completed degree project on Bachelor level.

Recommended prerequisites

SD2411 Lightweight Structures and FEM is strongly recommended. The course SD2414 – Fibre composites: Materials and processes, is recommended. Some experience with MatLab or programming in some other computer language is required.

Equipment

No information inserted

Literature

Zenkert D. and Battley M., Foundations of Fibre Composites, FLYG, paper 96-10, 1996.

Examination and completion

Grading scale *

A, B, C, D, E, FX, F

Examination *

  • TEN1 - Examination, 3.0 credits, Grading scale: A, B, C, D, E, FX, F
  • ÖVN1 - Assignment, 3.0 credits, Grading scale: P, F

Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

Other requirements for final grade *

Report from assignment (ÖVN1; 3 university credits)
Written exam (TEN1; 3 university credits).

Opportunity to complete the requirements via supplementary examination

No information inserted

Opportunity to raise an approved grade via renewed examination

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Examiner

Dan Zenkert

Further information

Course web

Further information about the course can be found on the Course web at the link below. Information on the Course web will later be moved to this site.

Course web SD2413

Offered by

SCI/Aeronautical and Vehicle Engineering

Main field of study *

No information inserted

Education cycle *

Second cycle

Add-on studies

SD2415 Process Modelling for Composite Manufacturing 6.0 credits
SD2416 Structural Optimisation and Sandwich Design 6.0 credits

Ethical approach *

  • All members of a group are responsible for the group's work.
  • In any assessment, every student shall honestly disclose any help received and sources used.
  • In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.