Patrick N.B. Anongba

8 Questions 39 Answers 0 Followers

Questions related from Patrick N.B. Anongba

Is the treatment of Fracture Mechanics completed within the framework of the theory of Elasticity?

This question deserves to be posed and clarified. It is at this price that we will be able to consider an improvement involving analyses including new concepts. The answer to this question is...

12 July 2023 8,903 1 View

What is the concept of the stress intensity factor as defined by Irwin and its utility?

The ʺstress intensity factorsʺ concept is known from Irwin (1948, 1957) who linked these to the energy release rate (crack extension force per unit length of the crack front) in the case of a...

05 January 2023 9,056 2 View

How to estimate the average rough conoidal crack shape (angle, height, circular basis) observed in high strength materials (steel, nickel alloys)?

Fatigue fracture surfaces of broken high strength materials exhibit rough conoidal cracks at the vertex of which are located inclusions or heterogeneities Experimental: The observations refer to...

23 December 2022 1,428 2 View

What are the theoretical estimates of the terminal velocity VT of tensile cracks in brittle materials and their validity with respect to experiments?

When a planar crack is loaded in tension (mode I) in brittle materials, the velocity V of the crack is observed to increase from zero to a terminal velocity VT, then follows crack branching on...

25 April 2020 8,201 4 View

Does anyone have a measurement of the stress to fracture an interface crack of length 2a, loaded in tension, as a function of crack half length a?

We are currently considering an interface crack of length 2a, at the centre of the interface, inside two materials A and B, loaded in tension. Surprisingly, this apparently simple special...

18 April 2014 8,759 13 View

I wonder whether the solution of the attached singular integral equation has been used in a previous work involving the interface crack under load?

This singular integral equation, whose solution is also given, is basic in a class of problems involving the interface crack under load. In order to give proper credit to former endeavors, please...

25 March 2014 7,636 4 View

Does anyone have experience with predicting the failure surface in brittle fracture?

POSED PROBLEM: Apply a remote general loading (mixed mode I+II+III) to a large fracture specimen. Find the achieved fracture surface corresponding to the applied loading. We consider large cracks...

01 January 1970 4,031 12 View

Can we definitely believe in the existence of an electric potential round a dislocation in a metal that originates from the dilatation of lattice?

A connected question is: what is known (or measured experimentally) about the electromagnetic fields round an elastic-plastic crack that propagates quasi-statically in metallic materials? Based on...

01 January 1970 7,724 7 View