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Home » Authors » Debbie Aliya

Articles by Debbie Aliya

Debbie Aliya

More about Fatigue (part 1)

Debbie
Debbie Aliya
April 7, 2021
No Comments

For those of you who have been following along with this blog recently, or the magazine, you have seen my previous writings about how to recognize fatigue cracks when they do not have obvious beach marks. This time we will start with a couple of images where the classical fatigue features known as beach marks are very obvious.


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Debbie Aliya

Fracture of a Punch with Confusing Features (part 2)

Debbie
Debbie Aliya
March 2, 2021
No Comments

Detailed inspection of the upper portion of the crack (Figure 2, rotated to an orientation about halfway between the left and right views of Figure 1) revealed a ridge pattern with finer steps merging to coarser ones from bottom to top (equivalent to left to right on Figure 1).


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Debbie Aliya

Fracture of a Punch with Confusing Features (part 1)

Debbie
Debbie Aliya
February 16, 2021
No Comments

Tooling failure analysis can be very challenging. Frequently, we have to deal with complex loading and multiple simultaneous damage processes.


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Debbie Aliya
TECHNICAL TALK

Failure Analysis for our Times: Fracture of a Punch with Confusing Features

Debbie
Debbie Aliya
February 16, 2021
One Comment

Tooling failure analysis can be very challenging. Frequently, we have to deal with complex loading and multiple simultaneous damage processes. Because the tools are so hard, fracture surface features are often very faint.


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Debbie Aliya

Why did the part fail? (part 3)

Debbie
Debbie Aliya
February 10, 2021
No Comments

The purpose of science is to reveal how the physical world works. The human world, including psychology and other social sciences, is part of the physical world. The human experience of consciousness, including our ability to experience aspects of the physical world through our sensory apparatus, is part of science.


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Debbie Aliya

Why did the part fail? (part 2)

Debbie
Debbie Aliya
January 26, 2021
No Comments

This is the second part of Debbie Aliya’s blog “Why did the part fail?”


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Debbie Aliya

Why did the part fail? (part 1)

Debbie
Debbie Aliya
January 12, 2021
No Comments

Speaking with greater clarity, why did the subject of the investigation deform or break? Why did some of its material disappear? Why have the strength characteristics become degraded?


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120920-Aliya

Planning and Writing a Report for a Failure Analysis

Debbie
Debbie Aliya
December 9, 2020
2 Comments

As I plug away at writing the materials-engineering-informed failure-analysis book that has been on and off my “Get it Done!” list since 2003, I have at last come to the part about writing the report.


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Debbie Aliya

How to Think About Failure Analysis of a Thing

Debbie
Debbie Aliya
November 2, 2020
No Comments

Failure is a loaded word. It implies fault. But the type of failure analysis engineers usually work on is of things.


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Debbie Aliya

Why did it fail?

Debbie
Debbie Aliya
October 2, 2020
No Comments

So, why did it fail? If the failure is due to mechanical causes, including fracture, wear and deformation, a true answer is always “because the stress exceeded the strength.”


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