Blog posts

Three PhD positions are available at the University of Groningen, The Netherlands, to work on

Dear Colleagues:The inaugural issue of International Journal of Applied Mechanics (IJAM) is now available on IJAM's website and all papers can be downloaded freely. IJAM website: http://www.worldscinet.com/ijam/ijam.shtml Regards

Hi everybody! I'm glad to join iMechanica, just hope to contribute something of interest...and share our penchant for this fascinating subject with all of you

Dear all, I post a study dealing with tack of prepreg materials. This kind of composite materials is increasingly used in the design of structural parts, particularly in the aerospace industry.Tack is one of the major properties that governs the ability of prepreg to be laid up. To investigate this property, we have developed a probe tack test to evaluate the effect of the temperature, the contact time, the contact force and the debonding rate on it.

I always have a question about the convergence problem: when a structure reaches its maximum load-bearing ability, the solution will end if the newton method is used in the finite element analysis. Then which form the stiffness stiffness in the finite element analysis takes on?  Singular or ill-conditioning?  How to explain the appearance of maximum load by variable stiffness matrix?