Dear eveyone,
I need to know the formula or expression to calculate the flexural rigidity (D) of RC Slab reiforced with steel bars. I know that for plain concrete, D can be taken as Et3/12(1-v2). However, I have no idea what is D when steel bars are added to slab. I really appreciate for any kind help. Thanks
Hellow,everyone here:
Anyone knows the fatigue limit and the long-crack threshold of Aluminum 2024-T3?Thanks very much.
Folks,
I'm embarking on a project to build a modified copy of a DIY 3D printer. See http://reprap.org/wiki/WebHome to get a rough idea. In my case, I have my own lathe and milling machine, so I can fabricate more substantial components, e.g., by machining aluminum. I also have larger stepper motors, some 3/8" precision rod and linear bearings that I can use.
I need to model viscoelastic behavior of polymer. I have storage modulus and loss modulus data as a function of temperature. I have found to determine the Prony series coefficients Ansys need shear and bulk modulus as a function of time-temperature. Does it mean complex shear moduls which can be calculated from storage and loss modulus. Can anyone advise me how I can use my data to calculate Prony series coefficients using Ansys?
SoftInWay Inc. continues the online training series on turbomachinery design and announces the schedule for the second part of 2010:
A number of 3 year PhD-Student positions in the areas of mechanical engineering, process engineering and applied mathematics is available in the Post-Graduate School "Micro-Macro-Interactions in Structured Media and Particle Systems", Otto-von-Guericke-University Magdeburg, Germany.
Further information can be found at http://www.uni-magdeburg.de/gkmm/free-position-new-gk.htm
A recent discussion at iMechanica following my last post here [^] leads to this post. The context of that discussion is assumed here.
I present here three sample problems, thought of almost at random, just to see how the suggestions made by Jaydeep in the above post work out.
Dear All,
I am doing modal analysis using ANSYS.
1) why every one is particularly taking first six modes of vibration for their results?. Is the probability of occurance of the first six exitation is very higher?
2) But how the frequencies for first 6modes are in ascending order ?
3) Just for verification, Assume ,
a) the earthquake frequency is around 22 to 25Hz.
b)Obtained natural modes for a system 5,7,8.8,9,10.2.
