DESIGN AND CONSTRUCTION OF A CREEP TESTING EQUIPMENT FOR LOW TEMPERATURE MELTING MATERIAL (PLASTICS)

DESIGN AND CONSTRUCTION OF A CREEP TESTING EQUIPMENT FOR LOW TEMPERATURE MELTING MATERIAL (PLASTICS)

ABSTRACT

Engineering materials have to be tested for creep before they are used for any project.  The low temperature creep apparatus fabricated for this project uses a simple levels to transmit a tensile stress to a specimen.The elongation of the specimen due to the tensile stress is measured using a dial gauge.  A weight hanger and a stirrup are provided for the weights which are used to produce this tensile stress.  To hold the specimen in place, loading pins are loading stirrups a re provided and a rest pin beeps the apparatus steady when not in for the setting up of the whole apparatus. Results of experiments carried out with the apparatus are provided and the general friends agree with those in the literature.

TABLE OF CONTENTS

CHAPTER ONE

Introduction                                                                                                1

1. Creep concept                                                                     2

1.2      The purpose of the project                                             6

1.3      Demand for the equipment                                            6

1.4      Literature review                                                               7

1.5      Kinds of phenomena                                                         8

1.6      Examples                                                                              10

1.7      Mechanism                                                                          11

CHAPTER TWO      

Description of apparatus and design theory                          13

2.1      static equilibrium conditions                                           17

1. Bending analysis for ac channel section                      18

CHAPTER THREE

Calculation                                                                                       21

3.1      Calculation the maximum load                                       24

CHAPTER FOUR

1. Fabrication                                                                           30

4.1      Experimental procedure and result                              34

4.2      Method of assembly                                                         36

DESIGN AND CONSTRUCTION OF A CREEP TESTING EQUIPMENT FOR LOW TEMPERATURE MELTING MATERIAL (PLASTICS)