hi all,
can anyone explain about the following basic questions
1. me the difference between the proportional limit and elastic limit.
Please dont give the definitions of both, i need some detailed explaination.
2. How many natural frequency a object can have?
Regards
sagar
The research on stretchable and twistable electronics by Yonggang Huang at Northwestern University and John A. Rogers at the University of Illinois at Urbana- Champaign has been featured on the cover of the NSF Budget Request to the United States Congress for the fiscal year 2011.
Details available at http://www.nsf.gov/about/budget/fy2011/cover_caption.jsp
I am refering to the book - Mechanics of Materials by Beer, Johnston and DeWolf (McGraw-Hill) topic 8.2.
When we design a wide-flange beam, we must consider two conditions. First, the shear stress at the maximum shear section must not exceed the allowable shear stress. Second, the principal stress at the junction of the web and the flange at the section of the maximum moment must also be compared to the allowable normal stress. This is straightforward and clear to me.
I want to find the material damping of polymer material through ansys, Is it possible to find the damping of a material damping by using ansys. In the experimental work the polymer material perspex is used in which 9 layers of perspex material are mounted on milling machine bed and machining is done along with work piece material to reduce the vibration and to found out the damping. How this can be analysed in ansys and which models can be used for this. Many layers are stacked one upon the other and damping has to be found out.How this modelling can be done.
Dear Colleague,
The 21st Australasian Conference on the Mechanics of Structures and Materials (ACMSM21) will be held at the Conference Centre of the City Campus, Victoria University, Melbourne, 7-10 December 2010. The conference will be hosted by the Faculty of Health, Engineering and Science, Victoria University, Melbourne, Victoria, Australia.
The Attached flyer outlines the conference scope, important dates, registration fees, topics covered and other conference details.
Dear Colleague,
I am writing to advertise an opening of a lectureship in the Mathematical Institute at the University of Oxford
The lectureship is in the Oxford Centre for Collaborative Applied Mathematics part of the Mathematical Institute . I am particularly interested in candidates at the interface between mathematics and mechanics.
The Global Enterprise for Micro Mechanics and Molecular Medicine (GEM4, www.gem4.org) and the Research Centre of Excellence (RCE) in Mechanobiology will be organizing a Summer School on Cellular and Molecular Mechanics with a focus on Mechanobiology. The 2010 GEM4 Summer School will be held from July 25 - 31, 2010 at the National University of Singapore. This 2010 Summer School will comprise both lectures and lab demonstrations.
As we all know, finite element matrices are sparse and many memory can be saved if their sparsity is exploited. Due to the latter, we are often provoked to declare the nxn stiffness matrix as a sparse one just before the element loop. Be careful of this method since the larger the matrix the slower the assembly operations. There is a better and more efficient way to code the assembly procedure in Matlab. I will show how to accomplish this. For the sake of simplicity, the stiffness matrix of the two-dimensional heat conduction problem on the domain (0,1)x(0,1) is considered.
