# mechanician

## Safety Factor and Material Factor or Amod, what is the difference?

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Hello, everyone! When talking about allowable stress, Safety Factor is introduced. While in offshore engineering, there are allowable stress modifier in API and material factor in NPD. So what is the difference between safety factor and allowable stress modifier or material factor? Are they used in special load conditions?

You help will be appreciated. Many thanks!

## residual stress and strain definitions (through-thickness) in ABAQUS/Explicit

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Hello everyone,

I need some help regarding the definition of initial residual stresses and plastic strains in a shell finite element (S4R) model in ABAQUS/Explicit.

I have determined the residual stress distributions and initial plastic strains and I need to assign these distributions to a given element set.

I understand I should be looking at:

*INITIAL CONDITIONS, TYPE=STRESS

ELSET_A, S11, S22, S33

## total solution time in dynamic explicit analysis

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Hello,

I'd like to know how the computation time depends on the element number in a model (dynamic explicit analysis in Nastran). When I work with a simple model which has a rather coarse mesh the function is linear, so 10 steps with the increment 0.001 is equivalent to 100 steps with the increment 0.0001. But I don't know how this dependency will evaluate if I build a much more complex model. Maybe it will be exponential?

Thank you

## Dispense materiali compositi

Dispense materiali compositi

## question

hi....I have one question...it is: what is the minimum weight of a water droplet pending on the roof that it will fall down....my question is this ...shall we use both ΔP and surface tension for the solution??? plz guid me....thanks

## Bird strike on engine fan blade

Good afternoon all,

I am doing bird strike analysis on engine fan blade,I have used lagrangian simulation for this model,very high plastic strain are coming. please suggest  how to retify it and if any one have example problem of bird strike(.k file) please share it

Regards,

Nizam

Hi

I work  on the damage to the adhesive.

in a abaqus please ,after viewing the results how to calculate the damage surface of the adhesive (damage rate).

Mhamdia.R

## The ANAND model in ABAQUS.

Hi, all

I am a newer with ABAQUS. I have to simulate mechanics of a new material with ANAND model.

I want to know whether a built-in ANAND model was in ABAQUS6.91 right now. And how to use it? I have seen in somewhere that someone said ABAQUS 6.5 had built ANAND model, but I don't find any information about ANAND model in ABAQUS6.91 I am using now.

I hope you can tell me something about it.

Thank you very much.

zidane

## hello ,everyone ,ask for thermal extended finite element crack growth or thermal extended finite element program code .

hello , i am new for xfem ,i want to simulate crack growth with thermal load using xfem ,have some one know what website has free thermal xfem or thermelastic xfem code ? or can send me to z770428@126.com , material is arbitrary , 2Dor 3D , THANK YOU

HONGGANG

## periodic boundary conditions

Dear all,

i have implemented the periodic boundary conditions in x-directon for my simple model. In the screed i see the moement of the body in x direction. I think it is not correct. Should be additional boundary conditions be applied? Whichones?

Best regards

ABAgirl

## 2012 BENJAMIN FRANKLIN MEDAL IN MECHANICAL ENGINEERING

2012 BENJAMIN FRANKLIN MEDAL IN MECHANICAL ENGINEERING

Zvi Hashin, Ph.D.
Tel Aviv University
Tel Aviv, Israel

Citation: For groundbreaking contributions to the accurate analysis of composite materials, which have enabled practical engineering designs of lightweight composite structures, commonly used today in aerospace, marine, automotive, and civil infrastructure.