What is overpressure in explosion papers?

Hi all, I have seen the "overpressure" concept in many papers, such as "Computer simulation of shock waves transmission in obstructed terrains", by Spyros Sklavounos, Fotis Rigas in which...

05 June 2019 5,587 4 View

Metal melts: Newtonian or non-Newtonian??

Hi all. Are metal melts considered Newtonian or non-Newtonian? If they are non-Newtonian, do you know which kind of non-Newtonian fluid they are? I know that we can do water modeling for some...

01 February 2018 3,388 5 View

Stress Work & Viscous Dissipation

Hi all, I have read many papers in which use two different formulas for Viscous Dissipation: tau : grad(U) tau : D [ D = 0.5* ( grad(U) + transpose(grad(U)) ) ] Which one is...

01 January 1970 792 2 View

Dominant mechanism of heat transfer, conduction or convection

Hi, Is there any criterion (e.g. a non-dimension number) to find out which heat transfer mechanism is dominant in a phenomenon? I've solved a heat transfer problem and now I want to know which...

01 January 1970 9,973 18 View

How to define and get results (stresses) for certain points of a model in abaqus, using python? When the size of the model changes?

I want to do a parameter study of a aixsymmetric cylinder in Abaqus. I want to create several jobs where I get the stresses for 3 different points in my model. These points are defined. I wrote a...

01 March 2021 10,078 1 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How relevant is Mini slump cone?

for all the rheology researchers, my question is, how relevant is a mini slump cone (smaller than a standard 50 cent rheometer). currently based on testing, the thickness of slumped material is...

26 February 2021 3,668 1 View

Stress/strain tensors decomposition ???

25 February 2021 6,760 1 View

How to reduce residual stresses in MD simulation?

I am working on a preparation of representative polymeric structures of some popular polymers, such as polyimide or PTFE for MD simulation, during which a single nitrogen or oxygen atom will be...

24 February 2021 8,105 3 View

Suggestions for occupational stress surveys?

I am currently writing a masters thesis on reasons for occupational stress in the early childhood classroom, and want to include a short survey assessing participants work-related stress levels. I...

24 February 2021 8,678 2 View

The most suitable method to calculate the stress intensity factor in the presence of contact between the crack lips?

I'm trying to study cracked structures under a compressive load taking into account contact between the crack lips. I would like to know if the method of extrapolation by displacement remains...

21 February 2021 8,694 4 View

Can anyone help with an Accurate Diffuser Expansion Loss formula for rectangular shaped diffusers in turbulent flow regime?

I have tried Idelchik's Handbook of Hydraulic Resistance 4th Edition (2007 page 300) formulas and across some range the formulas are reported valid for, the law of conservation of energy is...

20 February 2021 2,504 1 View

What are backpropagation formulas for residual neural networks?

14 February 2021 4,194 3 View

How to assign two different material/section properties in Abaqus(UMAT)?

Hi everyone, I am conducting a non-linear multi-layer pavement structure analysis which is a stress-dependent. So far, I am able to define the nonlinearity for one soil layer for its resilient...

11 February 2021 9,607 3 View