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Partial Differential Equations for Scientists and Engineers


I am an instructor who teaches the partial differential equatioin for mechanical engineering students at Myong Ji University in South Korea using the book, "partial differential equations for scientists and engineers" written by Prof. Stanley J. Farlow.

Luckly our department professor handed me over a copy of solution manual but which was not completed. Thus I wonder if anyone has a complete solution manual for this book. It will be grateful if I may be able to obtain a complete solution manual.

Thank you very much,

Young June Yoon

Mixed formulation

Dear All


 Does anybody have this paper?.


On some variational principles in the theory of elasticity and the theory of plasticity

HC Hu - Scientia Sinica, 1955

Thank you


Teng Li's picture

Your Students Are Your Legacy

by Prof. David A. Patterson (Professor of Computer Science at U.C. Berkeley,Fellow and past president of ACM)

Viewpoint from a Berkeley professor after 32 years of mentoring Ph.D. students. Hope you enjoy as I do.

You may also find an earlier discussion thread in iMechanica interesting:

Learning to be a PhD advisor



how to create e-glass epoxy composite material shaft in ansys? and what is classical lamination theory?

Choose a channel featured in the header of iMechanica: 

please help me how to create a model of e-glass epoxy composite material shaft in ansys and how to analyse it? and what is meant by classical lamination theory? and how to obtain the graph.  and alson if u know genetic algorithm help me to write the algorithm.

Zhigang Suo's picture

Finite Deformation: Special Cases

The notes on finite deformation have been divided into two parts: special cases and general theory (node/538). In class I start with special cases, and then sketch the general theory. But the two parts can be read in any order.

Estimate of Burst Strength of Dents in Pipe

Hi all,

I am a master student doing an analysis to estimate the burst strength of dented pipes, I have been able to model the indenter and pipe. I did a non-linear analysis to create the dent but my problem is how to remove the indenter and apply pressure to come about the burst. please how do I achieve this kind of analysis. I would be very grateful to contributors and examples that would help me solve the problem. The model is being done using ANSYS 11.0

My email is

Amit Acharya's picture

Notes on Implicit Update for Bergstrom-Boyce Network B

This post is in response to the imechanica request


 (a separate post, as I have to attach notes - it would be really nice to be able to attach documents to imechanica comments)

 Attached are hand-written notes I have used to implement the Network B for the Bergstrom-Boyce model. They were written for my use only, so if it seems stream-of-consciousness at times, don't blame me. The details should all be there, though.

g_rakesh2's picture

stresses at constraint locations

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hello everybody...

can anybody tell me about, "How to neglect stresses at constraint locations?".



rahul1986's picture


i need a big help. . .im having problems . . .in my problem there is a stationary block at origin . . .  a prisim is falling from some height . . . the problem is its workin fine . ..EXCEPT. . the prism is going through the block . . . i REALLY need help

Seeking Phd position in Mechanics / MEMS


I am a Mechanical Engineer with a Masters from Indian Institute of Science Bangalore. I have been working in various fields of Mechanical Engineering: Product development of forging components and in software development of hyper-elastic finite element software development.

msd.jacob's picture

Springback analysis using ANSYS

I am carrying out spring back analysis using LS-dyna and hyperform. The procedure as follows: forming is carried  using LS-dyna and then the spring back  is included in to the result file using hyperform and .k files are created using hyperform itself. While running the analysis, after certain number of iterations, the analysis aborts with message equilibrium can’t be achieved.  I have included the both the input files (with and without spring back).

model a composite laminate in abaqus?

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hi guys, im new to abaqus.

anyone know how to model a unidirectional composite laminate in abaqus?


CAn any one explain me what is the difference between tension and tension-tension loadings....

Can you become a mechanic by reading books?

Well I am really wondering about thsi right now as I read  that I should really try to further my education via Distance learning .

please help!! two solid mechanics problem relating stress, gears etc.


i am having problems solving two solid mechanics problems... can anyone please help??? the problems are:


Question 4:

A 2380 Nm torque is applied to gear D due to input torque from the motor at A, as shown in figure 4. Shafts 1 and 2 are both solid steel, 44 mm in diameter and 600 mm long. Gear B has a diameter of 250 mm and gear C has a diameter of 350 mm. The shear modulus G for steel is 80GN/m^2

Michael Borowicz's picture

Hard stage materials in Ansys


I'm trying to simulate and compare principal stresses in model of bolt and nut, for different material data. I would like to get the soft/hard stage comparison. The problem is that I just do not know how to define hard stage material, it is not in standard material library in ansys (workbench or classic).

If anyone could help me giving some examples of hard stage materials data I would be greatfull.

Gouse's picture

Nominal stress Vs Nominal strain plot in FE simulations

Hi all,

 I want to plot nominal stress Vs nominal strain plot from my FEA simulation. In generally I will get stress and strain at element level, now how can I plot stress-strain for the overall struture. I am applying uniaxual load on specimen. My analysis is non-linear.

Thank you




Zhigang Suo's picture

Free Energy

For a system in thermal contact with the rest of the world, we have described three quantities: entropy, energy, and temperature. We have also described the idea of a constraint internal to the system, and associated this constraint to an internal variable.

Zhigang Suo's picture

Evolving small structures

I taught this course at the University of California, Santa Barbara, in Winter 1994, Winter 1995, Spring 1996; at Princeton, Spring 2003; at Harvard, Spring 2004.  The notes posted here are those distributed to the class in Spring 2004.


Zhigang Suo's picture

How does temperature become a number

An essential step to “understand” thermodynamics is to get to know temperature: how temperature comes down as an abstraction from empirical observations, and how it rises up as a consequence of the fundamental postulate.  I have just updated my notes on temperature.  The beginning paragraphs of the notes abstract temperature from empirical observations.  These paragraphs are posted here.

lyyl's picture

sourse of fluid mechanics



I want to learn  fluid mechanics myself,  but  i have no idea how to do and where to search the sourses fluid mechanics ?? 

Thanks in advance


Visualization of point displacements


I'm a new ABAQUS user. I wander if I can get the displacements of any point just by putting the mouse arrow near by it like what is done in the SAP program.

I'm searching for that option but till now didn't find it

Thanks a lot in advance

Viewing the displacement on the deformed shape


I'm a new user of ABAQUS. I want to be able to view the displacements on the CAE deformed shape. Like to put the mouse arrow over a certain node and it writes the exact value of the deformations. (Like what can be done easily by the SAP program)

I just want to figure out how is that possible


Thank you in advance


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