Course detail

Mechanics and Failure of Non Metallic Materials

FCH-MCO_MPMAcad. year: 2017/2018

Introduction to solid mechanics, basic terms, stress and strain tensor, strain energy, linear and non-linear elasticity, stress concentration. Yielding, yield criteria. Plastic deformation in polymeric solids. Elastic stress field around crack tip in a homogeneous isotropic solid. Stress intensity factor, shape factor, calibration factor F, solution for a finite dimension solid, mixed mode of failure, scale factor. Systems with energy dissipation - failure criterion, failure types, J integral. Mechanisms of crack initiation - microshear bands, crazes, cavitation, percolation concept in polymer failure. Fracture behavior of various materials (PMMA, PC, PP, PE, HIPS, ABS, PVC, epoxy). Impact failure. Brittle ductile transition.

Learning outcomes of the course unit

Principles of solid state mechanics, introduction to fracture mechanics, Yield and fracture criteria for plastics, examples of failure of plastics and composites, fatigue

Prerequisites

polymer physics

Co-requisites

Not applicable.

Recommended optional programme components

Not applicable.

Recommended or required reading

Pokluda J., Kroupa J., Obdržálek L.: Mechanické vlastnosti a struktura látek. PC-DIR spol. s r.o., Brno 1994. (CS)
Beer F. P., Johnston E. R.: Mechanics of Materials. McGraw-Hill, New York 1991. (CS)
Anderson T. L.: Fracture Mechanics. CRC Press, Boston 1995. (CS)
Jancar J.: Mechanics and Failure of Plastics. FCH VUT Brno, Brno 2005. (CS)

Planned learning activities and teaching methods

The course uses teaching methods in form of Lecture - 2 teaching hours per week. The e-learning system (LMS Moodle) is available to teachers and students.

Assesment methods and criteria linked to learning outcomes

oral exam 30 minutes, 1 written test during semester

Language of instruction

Czech

Work placements

Not applicable.

Course curriculum

1. Introduction

2. Plastic deformation

3. Fracture

4. Elastic stress field at crack tip

5. Stress intensity and strain energy release rate:

6. Fracture with energy dissipation

7. Micromechanisms of polymer fracture

8. Impact fracture

9. Fatigue

Aims

This graduate course aims to provide students of materials science majors an introduction to mechanics of solids, especially, outlining the existing relationships between elastic and viscoelastic stresses and strains in both isotropic and anisotropic solids under complex loading states. In the second part, introduction to fracture phenomena in non-metallic materials is provided along with introduction to linear elastic fracture mechanics with emphasis on effects of structural variables on failure of polymers, polymer blends, composites and ceramics.

Specification of controlled education, way of implementation and compensation for absences

none

Classification of course in study plans

  • Programme NKCP_CHM Master's

    branch NKCO_CHM , 1. year of study, summer semester, 4 credits, compulsory

  • Programme NPCP_CHM Master's

    branch NPCO_CHM , 1. year of study, summer semester, 4 credits, compulsory

  • Programme CKCP_CZV lifelong learning

    branch CKCO_CZV , 1. year of study, summer semester, 4 credits, compulsory-optional

Type of course unit

 

Lecture

26 hours, optionally

Teacher / Lecturer

eLearning