Michael William Spindler

12 Questions 74 Answers 0 Followers

Questions related from Michael William Spindler

Should we divide Creep Rupture up into (1) Time Dependent Plastic Collapse, trans-granular fracture and (2) creep failure, inter-granular fracture?

Should we divide Creep Rupture up into (1) Time Dependent Plastic Collapse, trans-granular fracture and (2) Creep Failures, inter-granular fracture? Trans-granular failures caused by time...

01 October 2019 4,801 4 View

When does plastic hole growth dominate over diffusion controlled creep cavity growth?

Dr Bin Yang asked an interesting question: https://www.researchgate.net/post/How_to_distinguish_between_creep_voids_and_dimples I am currently working on a phenomenological creep damage model...

11 September 2019 607 4 View

How does Plastic Instability affect Mechanical Property Tests?

I wish to open a discussion on the way that Plastic Instabilities influence the results of Mechanical Tests. For example, tensile tests, creep tests, torsion tests, pressurised tubes test, etc.....

29 May 2018 3,604 47 View

The engineering stress & strain are defined by the original area and original gauge length respectively. Is this by definition, at room temperature?

In mechanics of materials the engineering stress & strain (Cauchy) are defined by the original area and original gauge length respectively. Is this by definition, at room temperature at which the...

03 January 2018 4,017 20 View

When is it appropriate to use Expert Judgement in Science and Engineering and when must one's actions and decisions be bounded by Knowledge?

There are circumstances when acting upon expert judgement is desirable; for example: 1. In an emergency situation where a quick decision is vital. 2. Where an innovation is being made that has not...

19 April 2017 4,299 11 View

To what extent is creep rupture life determined by necking?

Most creep tests are performed under constant load, some creep tests (notably at Swansea University) are performed under constant stress (assuming uniform strain). However, the localisation of...

01 December 2016 1,020 9 View

Does Dynamic Strain Ageing (DSA) in Metals Cause Damage?

Of course this question is loaded with sub-questions so feel free to take your answers wherever you feel inclined. For me I am interested in solution annealed, 300 series austenitic stainless...

07 October 2016 1,446 8 View

What effects does stacking fault energy have on plasticity and creep of FCC metals?

I believe that stacking fault energy is an important factor in elevated temperature plasticity, both monotonic and cyclic and creep properties. In particular in FCC metals and alloys. However,...

11 July 2016 2,077 10 View

What causes an austenitic stainless steel to shrink when exposed to elevated temperature and plastic deformation?

I have conducted a number of stress relaxation tests (strain controlled creep tests) at elevated temperature on an austenitic stainless steel. In a great many cases the stress increases during...

07 July 2016 8,020 28 View

I am looking for a suitable equation to describe the effect of temperature on the fracture toughness of steel?

It is usual for the effect of temperature on the facture toughness of steel to show a lower shelf at low temperatures, then as the temperature increases to exhibit a rapid rise (a transition...

09 December 2014 7,335 3 View

Why is Creep-Fatigue challenging to solve? Alternatively; Creep-Fatigue, why are there so many different methods for predicting endurance and life?

Brian Dyson (https://www.researchgate.net/scientific-contributions/BF-Dyson-2003401809) used to joke that there were many times more models for predicting creep-fatigue than there were researchers...

01 January 1970 9,377 3 View

New Book by Rolf Sandström Basic Modeling and Theory of Creep of Metallic Materials

Basic Modeling and Theory of Creep of Metallic Materials which is available online https://link.springer.com/book/10.1007/978-3-031-49507-6 Can anybody recommend other similar books and papers on...

01 January 1970 4,242 1 View