# opinion

## Is peridynamics a superset of Continuum Mechanics?

Recently, I have found a new theory, called Peridynamics, used to solve, mainly, fracture mechanics problems in materials. But, I am confused about the issue if it is a superset of continuum mechanics or is it a totally new theory that reformulate our previous understanding of continuum mechanics? How do you measure material properties with this theory? Do we need to reformulate our theories to deal with fracture mechanics problems? Is it a totally accepted scientific theory?

cordially,

Mario J. Juha

## ansys command using IRLF,1

i m little bit confused about doing inerta relief command analysing free free model...such as aircraft....

i have an quey that.. if command IRLF,1 used in ansys for static analysis... but model is in dynamic ?

what will be the the displacement and stress plot using IRLF,1 command....will these simmulate the correct model??

please guide me in this regards..

Dileep

## Today is Pi day and Einstein's birthday, again!

Google's logo is very cute today !

Today is defined as Pi day, it is also Albert Einstein's birthday. Besides, today is Japaness lover's "white day".

According to Wiki, "In the 1980s the Japanese National Confectionery Industry Association launched a successful campaign to make March 14 a "reply day", where men are expected to return the favour to those who gave them chocolates on Valentine's Day, calling it White Day for the color of the chocolates being offered."

## ROPS Analysis

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Need some help with ROPS analysis and design Criteria

I am aware that the (Roll Over Protection Structure) ROPS analysis is an ocean and I have just started to explore it as there is a need of it at my work. As of now, I have more questions and many wrong answers. So kindly bare with me. I will start with a brief introduction of what I know followed  by my question.

## How to classify vehicle parts into sprung and unsprung mass?

I am currently working on deriving equations for different vehicle models using Lagrangian and Newtonian methods. I am need of parameters to test few MATLAB models, and in vague to know exactly how to classify the mass into sprung and unsprung. Similarly, how do I obtain the MOI separately for the unsprung mass?

Operation of the keyword *load-blast of LS-Dyna

How it works and its various applications in the simulation of an explosion of a mine

## higher order shell theories and finite elements

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Hello,

Recently I faced few questions in a course that I am attending:

1) Outline the salient features of different higher order shell theories.

2)Explain why some shell theories are not suitable as the basis of element formulation.

3) Discuss any limitations of elements being used in relation to their underlying formulation ( e.g use of shallow shell theory or cylindrical shell theory).

## Stress/Strain calculation

Hello

what do think why investigators await about 3 decades to calculation of local stress/strain by elastic-plastic fracture mechanics?and basically why elber's discovery[crack closure] was so important and play a key role in numerous articles?

How can i calcualtion the amount of load transfer through the contacting crack faces?

How can i determine the location of it?

Thank you

## Successful people will choose Ed Hardy

The
ed hardy Clothing was getting out to everyone and I noticed, in certain areas, that people were really into this shit. I thought it was a little weird mostly. Why? Because its based on a tattoo artist by the name of Don Ed Hardy. Christian Audigier was pretty much making shirts based of his tattoos. I admit, I do like Don Ed Hardy’s tattoos on people but not on clothes. Don’t get it twisted. I found the tattoo concept interesting. But it only appeals to me it as a coloring book on a shirt.

## need help in Ansys static analysis

sir ,i ahve some problems in use ansys element CERIG,MPC 184 and RB3 elements....what is difference in transfering loads to slave nodes using MPC184 elements and command CERIG and RBE3 ..

and also why mass21 elements are required if u defining coonection usimg CERIg and RBE3 command..

plz...advice and clarify my doubts to understand better..

thanks and regards..

-dileep

## How can I model a bridge which consits of a small beam of composite that surrounded with ceramic layer

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Hi dear

I am going to model a bridge in dental work which it consists of two parts:

1: a small beam which it is made of composite 5 plys

2: a cramic part which surround the beam.

I want to model it with Abaqus. Please help me if you can. I'd appreciate if you help me and send its steps to my email: kian32m@yahoo.com