Examples of Wheel Failures

Slides:

Advertisements

Similar presentations

CHE 333 Class 18 Fracture of Materials.

Advertisements

AS Physics Unit 11 Materials – Further Reading Mr D Powell.

Metallurgy of Welding.

LECTURER5 Fracture Brittle Fracture Ductile Fracture Fatigue Fracture

Fundamental Mechanical Properties Fatigue Creep

CHE 333 Class 20 Fracture continued.

Failure of Materials in Service What is Failure? How is it defined?

Brittle Creep: How it works and its role in fracture 02/05/2014 Stephen Perry.

MSM Lab . ( Graduate Student )

NOTCH EFFECTS INTRODUCTION OF A NOTCH AFFECTS THE FRACTURE PROCESS Eg: INCREASES THE DUCTILE-BRITTLE TRANSITION TEMPERATURE OF STEEL NOTCH CREATES A LOCAL.

FE Post Processing Plotting Campbell Diagram Goodman Diagram Fracture Yield Principal Stress.

Basic Mechanisms of Fracture in Metals

ENGR 220 Section 4.7. Saint-Venant’s Principle When loading is applied at a point on a body, it tends to create a stress distribution that becomes more.

Lecture # 7 Mechanical Properties(Cont) Intended learning Outcomes: After the end of this lecture the student should be able to: 1- Evaluate and measure.

LECTURER6 Factors Affecting Mechanical Properties

Examples of Aluminium Fractography

1.Failure occurs at the intersection of the round pocket and the outlet rifle drilling (just barely visible in white, behind the yellow outlet plunger),

Lecture # 6 Failure Intended learning Outcomes: 1.Describe the mechanism of crack propagation for both ductile and brittle modes of fracture. 2. Explain.

Early structural concepts  Some of the structures in earlier have endured for ages.  Materials used were brittle type like bricks, stones, mortar: poor.

Fracture This is BIG topic Underlines all of Failure Analysis – One of the big fields that metallurgists/ material scientists get involved in There are.

Chapter 15: Fundamentals of Metal Forming

Fatigue Fatigue is the lowering of strength or the failure of a material due to repetitive stress, which may be above or below the yield strength. Many.

Material failure analysis

Failure Analysis of a Hollow Bar

FATIGUE Fatigue of Materials (Cambridge Solid State Science Series) S. Suresh Cambridge University Press, Cambridge (1998)

1 Design for Different Type of Loading Lecture Notes Dr. Rakhmad Arief Siregar Kolej Universiti Kejuruteraan Utara Malaysia Machine Element in Mechanical.

ENVIRONMENT ASSISTED CRACKING  When a metal is subjected to a tensile stress and a corrosive medium, it may experience Environment Assisted Cracking.

FATIGUE Fatigue of Materials (Cambridge Solid State Science Series) S. Suresh Cambridge University Press, Cambridge (1998) MATERIALS SCIENCE &ENGINEERING.

Failure Analysis Virtual Lab A failure occurred on the tail section of a commercial aircraft (the failure was video recorded). The transportation safety.

Introduction Introduction to Brittle Deformation.

Mechanics of Materials II UET, Taxila Lecture No. (4&5)

4/29/2002, Monday Environment-Assisted Cracking Chapter 11.

Transocean Spitsbergen Summary failure in anchor line no 7,

Probability of ship fracture John Kent Contents 1What is brittle fracture 2Material fracture toughness 3Calculation overview 4Results.

Date of download: 5/27/2016 Copyright © ASME. All rights reserved. From: Reducing Residual Stress in 7050 Aluminum Alloy Die Forgings by Heat Treatment.

ISSUES TO ADDRESS... How do flaws in a material initiate failure? How is fracture resistance quantified; how do different material classes compare? How.

Failure Analysis of Mining Equipment – Why Bother ? By Peter Laczko (BSc)

Corrosion process and control (TKK-2289)

FAILURE ANALYSISOF WELDED COMPONENTS

A Seminar Report On Fracture Mechanism In Design And Failure Analysis

Technical Standards Branch Class B Bridge Inspection Course BIM Bridge Inspection and Maintenance Basic Structural Considerations INFRASTRUCTURE AND TRANSPORTATION.

Group 3 Steels: Eutectoid Composition Steels Steels with carbon contents just below the eutectoid to the eutectoid composition (0.6 – 0.8 C) are used.

Fundamental Mechanical Properties Fatigue Creep

SHUBHAM VERMA. Fracture Mechanism In Design And Failure Analysis PREPARED BY SHUBHAM VERMA ME-2 nd Roll No.:BT/ME/1601/020.

Introduction Bridge members must be able to carry the loads applied to them. This presentation considers: how loads are applied to members how bridge.

Materials info consultancy private limited

THE PROCESS OF CRACK INITIATION AND ITS PROPAGATION

Stress and Strain – Axial Loading

Materials Engineering

Types of Fracture.

The energy-balance approach

Fracture Behavior of Interfaces

Recall three PT margins

What is the Symptoms of Thermostat Failure in your Car?

CHE 333 Class 20 Fracture continued.

4/19/2002, Wednesday Three Stages Fatigue Fracture

Machinability of Metals

Fracture mechanics Subjects of interest Introduction/ objectives

Determination of Fracture Toughness

1/18/2019 6:28 AM C h a p t e r 8 Failure Dr. Mohammad Abuhaiba, PE.

Mechanical Properties: 2

Strength of Concrete Strength of concrete is commonly considered its most valuable property, although in many practical cases, other characteristics, such.

V. Fault Mechanisms and Earthquake Generation

Plastic Deformation of Metals and Recrystallization

FATIGUE FATIGUE Dr. Mohammed Abdulrazzaq

Plastic Deformation of Metals and Recrystallization

DR. AL EMRAN ISMAIL FRACTURE MECHANISMS.

CHE 333 Class 18 Fracture of Materials.

Presentation transcript:

Examples of Wheel Failures Wheel that failed immediately after overheating with fatigue crack in the rim. Wheel that failed immediately after overheating with fatigue crack in the flange. Wheel that failed in normal operation some time after overheating. Fatigue crack initiated from rim stamping. Wheel that failed in normal operation some time after overheating from fatigue crack in the tread surface.

Wheel failed immediately after cooling from overheating.

Broken rim from the above wheel

1 Fatigue crack, 2 brittle propagation while hot, 3 brittle propagation while cooling

Heat affected area at the fatigue crack location Heat affected area at the fatigue crack location. Occurred some time prior to failure.

The large gap at the fracture is due to the release of tensile residual stress present in the wheel rim. The wheel failed immediately after overheating.

The fracture did not initiate at the rim stamping.

The fracture initiated at the flange due the tensile residual stress.

Modification of the flange surface microstructure due to flanging added to the general tensile residual stress at the fracture initiation site.

Delayed Failure due to fatigue crack growth caused by tensile residual stress in the rim.

Delayed Failure Due to Overheating. Fatigue Crack arrowed

Fatigue crack initiated from stamped number

Macro etch did not show any evidence of overheating

Failed in service, the fracture opened up indicating tensile residual stress

The wheel had been overheated some time ago.

Surface crack near the fracture shown by Magnetic particle testing

Fatigue fracture at the initiation of the large brittle fracture Fatigue fracture at the initiation of the large brittle fracture. This is the same type of crack as that shown in the previous slide.