fracture mechanics

Assignment: Each student completes a term paper of selected topics that (a) addresses a fracture phenomenon in materials or structures, and (b) involves analyses using fracture mechanics. The project contributes 25% of the final grade, distributed as follows:

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hii all..

i am working on fracture mechanics. i had modeled a 4 pt bend specimen having single notch crack(in ABAQUS). i am trying to find the range of K-dominant region at the crack tip.i had modelled radial mesh at the crack tip and using 20 noded reduced integration elements. To analyze the K-dominat region, primarily i had compared the theoritical stress plots and computational stress plots. stress plots means Sxx Syy Sxy values plotted againt the angle(angle measured from uncracked segment) at particular radius.

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1. Introduction

2. Elements of linear elasticity

3. Stress intensity factors

4. Energy release rate

5. Fracture toughness

6. Applications of LEFM - Practical Issues 

7. Mixed mode and interface fracture

I wanted to get some insight in the transient stress intensity factor (SIF).

In the time history, we notice there is an overshoot (~27%)  from the
steady state SIF for a fixed (not propagating crack). I found the
overshoot occurs at the time when the reflected wave from the opposite
crack-tip comes back to the first crack tip. I wanted to know why this
overshoot occurs, what is the physical explanation?

Sandip Haldar 

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Add Problem 5: use the method of superposition to obtain the stress field around a hole in an infinite sheet under uniaxial remote stress.

Due date extended to Monday, January 28, 2008. 

Homework Problem 1: Self introduction in iMechanica (due January 21, 2008)

Homework Problems 2-5 (due January 28, 2008) 

Homework Problems 5-8 (due February 7, 2008) 

Homework Problems 9-18 (due March 3, 2008) 

Homework Problems 19-23 (due March 24, 2008) 

Homewrok Problems 24-28 (due April 9, 2008) 

1. Post a comment to this entry to explain to your teaching staff and classmates why you are taking this class. Include the following items in your comment:

• Which department or graduate program are you currently enrolled in?

• Your prior courses in solid mechanics.

• Your undergraduate major and where you were enrolled.

• What might be your strength and weakness related to this course.

• Your research group if you already belong to one (please give a link to the web page of your group).

• Your likely research direction(s).

Time: Monday and Wednesday 3:00 - 4:30 pm

Place: WRW 312, University of Texas at Austin

Instructor: Rui Huang, WRW 117D, (512) 471-7558, ruihuang@mail.utexas.edu

Lecture notes 

Homework Sets

Term Papers (with links to abstracts, presentation slides and final reports)