Skip to main content

Explicit vs. implicit FDM: Could you please suggest a reference?

Submitted by Ajit R. Jadhav on

The context is the finite difference modeling (FDM) of the transient diffusion equation (the linear one: $\dfrac{\partial T}{\partial t} = \alpha \dfrac{\partial^2 T}{\partial x^2}$).

Two approaches are available for modeling the evolution of $T$ in time: (i) explicit and (ii) implicit (e.g., the Crank-Nicolson method).

It was obvious to me that the explicit approach has a local (or compact) support whereas the implicit approach has a global support.

[Call for Papers] 3D Printed Soft Materials, ASME IMECE 2016

Submitted by Sung Hoon Kang on

We would like to invite you to submit an abstract to the session on 3D Printed Soft Materials at the ASME 2016 IMECE to be held from November 11 to November 17, 2016 in Phoenix, AZ.

Additive manufacturing, also known as 3D printing, offers unique opportunities to explore novel properties and mechanics of soft materials. This session calls papers from research efforts related to soft materials with novel properties realized or created using 3D printing techniques. Specific topics of interest include, but not limited to:

My Top 10 Free 3D Model Databases

Submitted by Stefan Suwelack on

There are plenty of websites or repositories for 3D models. In practice I’ve often found myself searching through a lot of them when looking for a particular model. In my opinion, there isn’t a one stop shop solution. Instead, there are several really good websites that are worth to check out. In this post I’ll present my favorite 10 3D model databases divided into these four categories:

  • CAD models: If you are a mechanical engineer and are looking for models to re-use in your own design, then these repositories are for you.

A perspective paper on flexoelectricity by Prof. Pradeep Sharma

Submitted by Yonggang Huang on

A perspective paper on flexoelectricity by Professor Pradeep Sharma (University of Houston) is published in the March (2016) issue of the Journal of Applied Mechanics.  A perspective paper describes an important, emerging field in mechanics.  The first perspective paper, by Professor Huajian Gao (Brown University), has been downloaded more than 8000 times since its publication.  This new paper by Professor Sharma is the 3rd perspective paper published in JAM.  The paper is attached.

Orthogonality and closure relations in Stroh formalism

Submitted by Miroslav Hrstka on
Choose a channel featured in the header of iMechanica

Dear iMechanica members,

I deal with exteded Stroh formalism for piezoelectric media. I have problems with orthogonalization of Stroh´s matrices A, B, respectively how to fulfil the ortogonality relations (see attachments). I tried to "rape" it and made the left matrix inverse of the right matrix (then the product is an unit matrix) and I became very similar singularity expomemt as in the paper