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Updated: 16 hours 59 min ago

Re: Job or business

Sat, 2017-06-17 16:59

In reply to Engineer: Career Pathway Conundrum – job or business

Dear Farhan,

There are consultants in Silicon Valley who charge $10000 a meeting to discuss similar questions.  The reason they can charge such fees is that they have a strong network of connections that they can point a potential business person to.  I don't have that network, so I'll offer my views for free.  Also note that this is an academic forum and most people who post here have probably never worked outside of academia and will not be able to answer your questions.  I, on the other hand, have actually tried running a business and have a clearer idea about what's involved.

Here are some of my thoughts:

1) Start your business as early as you can.  Youth gives you the advantage of not having family obligations and the energy to work 16 hour days.

2) Unless you have existing capital, don't quit your day job.  Put your 8 hours into the day job and then 8 hours on your business.

3) Find a customer first and then build the product.  Look for extra money only when you need to grow.

4) Get a business partner to share the load.  It's lonely out there and you will be rejected more times that you can count.  A business partner can help in the initial stages.

5) Most importantly, work the phones and become an expert at selling.  Create a network of contacts and keep in touch with them regularly.  My rule of thumb is at least one new contact a week.

6) Finally, don't expect success overnight.  It might take five years or more to learn the art of creating and running a business.  Keep in mind that business is like any other field; you'll have to learn a lot but primarily about how to work with humans and human psychology.

-- Biswajit


Thank you for your generous

Sat, 2017-06-17 09:19

In reply to A cohesive zone framework for environmentally assisted fatigue (code included)

Thank you for your generous sharing!

Great news! Rapid review will

Fri, 2017-06-16 07:57

In reply to the new impact factor for JAM

Great news! Rapid review will attract more and more high quality papers.

This is good news

Thu, 2017-06-15 10:28

In reply to the new impact factor for JAM

While review process should be given the due time it needs, some journals take unusually long time for  reviewing papers. It is great to see your committment to rapid review and get the work out where other researchers can read. I will be glad to submit any work to JAM when the opportunity arises. Thank you.

Wonderful! I believe JAM will become better and better!

Wed, 2017-06-14 19:31

In reply to the new impact factor for JAM

Wonderful!  I believe JAM will become better and better!  Thanks for your great efforts!

Abaqus mailing list

Mon, 2017-06-12 15:16

In reply to Evaluation of J-integral in a 2D non-linear Abaqus model

Subscribe to and seek assistance from the
ABAQUS mailing list
or from the ResearchGate discussion forum.

Search the archive of the list before posting in it.

Good luck


Brillant and inspiring! Thank

Sat, 2017-06-10 18:25

In reply to Learning to be a PhD advisor

Brillant and inspiring! Thank you Prof. Suo.

It reminds me of my years as graduate sudent with Prof. Jean Baptiste Leblond in Paris, France.

Sad news

Fri, 2017-06-09 22:00

In reply to Professor Walter Noll

Indeed it is a great loss to the community. We all learnt alot from his manuscripts.

The position is still open.

Fri, 2017-06-09 17:29

In reply to Postdoc position at the department of Mechanical and Materials Engineering, Western University, Canada

The position is still open. You are welcome to apply. 

link to bone remodeling code

Fri, 2017-06-09 17:05

Just to note...

Fri, 2017-06-09 14:30

In reply to Stress or strain: which one is more fundamental?

Just to note: I think I have reached what I think is a proper resolution of this issue in my mind.



Initializing solution dependent variables in vumat.

Thu, 2017-06-08 13:57

In reply to How to Assign Initial Solution-dependent State Variable to VUMAT

Dear All,
I am working in user defined materail subroutine VUMAT. I need to initialize the SDVs for a particular set of elements. I have 6 SDVs. For that i made following cahnge in my input file :

*initial conditions, type = solution
elset_name, 0, 1, 0.5, 0, 1, 0



With regards


Seeking help in MATLAB code of EFGM for CFD problems

Thu, 2017-06-08 00:37

In reply to Implementing boundary conditions using Penalty method for EFGM method

Implementing J. Dolbow T. Belytschko MATLAB code of EFGM for CFD pronlems where more than one partial differential equations are involved such as continuity, momentum and energy equations. 

Can anaybody share the MATLAB code for a heat transfer problem of EFGM method using Penalty method for implementing boundary conditions.

Thanks & regards


nanoindentation is NOT a low velocity impact method

Wed, 2017-06-07 15:11

In reply to Dear Dr. Xu,

Dr. Chandrashekar,

We didn't call that, this reviewer called. Of course, nanoindentation is a static test method. This reviewer just didn't have nanoindentation experience like you. Is it clear to you now? 

Roy Xu


Dear Dr. Xu,

Wed, 2017-06-07 13:34

In reply to Seek your input on nano-indentation or basic mechanics of materials

Dear Dr. Xu,

Altough your proposed ideas sound interesting, calling nanoindentation as 'low velocity impact method' might confuse a lot of people. Nanoindentation is primarily applied to measure material properties, where the tip penetrates into the sample at extremely low velocities. I have worked for many years relating computational mechanics with nanoidnentation experiments. My knowledge on studying impact related problems using nanoindentation is very limited. Furthermore, the literature on such problems is sparse. I totally understand the points made by the reviewers. 


Dr. Gurudutt Chandrashekar


The job input file "Job-Test

Wed, 2017-06-07 09:32

In reply to How to define Element based surface/Node based surface in Abaqus

The job input file "Job-Test.inp" has been submitted for analysis.

Error in job Job-Test: 3 nodes are missing degree of freedoms. The MPC/Equation/kinematic coupling constraints can not be formed. The nodes have been identified in node set ErrNodeMissingDofConstrDef.

You have perfectly understanding!

Wed, 2017-06-07 01:25

In reply to Dear Dr. Xu,



You have perfectly understanding! Nanoindentation and projectile impact sound very different. However, for low-speed impact (unlike bullet penetration), projectile impact is a kind of dynamic indentation so we can use indentation mechanics to connect these two topics. I list our two papers on these two different topics below if you’re interested. The value of our proposal is to combine  nanoindentation with modern computational mechanics to predict/simulate complicated impact problem. Our purpose to use Nanoindentation is to measure contact stiffness--- like (static) Young’s modulus. However, our great idea from three faculty members was just killed by a reviewer who even doesn’t know Nanoindentation is a static method or low velocity impact method. My point here: for young researchers, your nice work or treasure might be treated as “trash”. But if you think you’re doing the right thing, never give up because our scientific research is mainly to discover truth, not just for job and money (of course we need them)!



Roy Xu



Dear Dr. Xu,

Tue, 2017-06-06 22:37

In reply to Seek your input on nano-indentation or basic mechanics of materials

Dear Dr. Xu,

I have worked on characterization of polymers by nanoindenation for a few years. Based on my experience in this field, I haven't seen any impact problem where nanoindentation has been applied. Nanoindentation is a quasistatic method, and studying high velocity impact/material damage problems could be beyond the scope of this method.

Thanks a lot for sharing your thoughts, Michael!

Tue, 2017-06-06 10:39

In reply to Dear Sung Hoon: One challenge

Thanks a lot for sharing your perspectives.
As many people are working on making hierarchical structures with multiple materials and/or with controlled organizations, hopelly it will allow us to develop more accurate physical models. 

Dear Sung Hoon: One challenge

Tue, 2017-06-06 08:23

In reply to Thank you very much for your informative and inspiring article.

Dear Sung Hoon: One challenge in this field is the development of more accurate physical models for mechanical testing. Unfortunately, most 3D-print technologies are limited to polymeric materials, and often single material constructs. As we know, biological materials are usually composed of complex hierarchical structures with architectural organization across several size scales < 100 microns (the typical resolution limit of many desktop 3D-printers). Many natural materials are also composite systems composed of mineralized subunits, but ceramic and composite 3D-printing is still in its infancy. Improvements in these areas will likely allow for the creation of more accurate biomimetic models for research in biomechanics, with better replication of hierarchical size scales and more complex ceramic/composite compositions.


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