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The composite strength of Reinforced Concrete which is a mixture of two main materials can be calculated by the formula given by Tsai : X=(vf+vm*Em/Ef)*Xf where vf is the fiber (steel) fraction and vm is the concrete (cement+sands+gravels) fraction. Xf is the yield strength of Steel and Xm is the compressive strength of the Concrete matrix. For the application case: vf=0.01911, vm=0.98089, Xf=270 MPa, Xm=40 MPa, Ef=207.000 GPa, Em=30.798 GPa we obtain X=44.563 MPa.
Under the actions of internal pressure and electric voltage, a spherical dielectric elastomer balloon usually keeps a sphere during its deformation, which has also been assumed in many previous studies. In this article, using linear perturbation analysis, we demonstrate that a spherical dielectric elastomer balloon may bifurcate to a nonspherical shape under certain electromechanical loading conditions.
I have a question about the superpositon principle in Elasticity Mechanichs. Does there exist such a state which can composited to one plane stress state and plane deformation?
A reliable numerical model is crucial for the design and analysis of modern dynamic engineering systems such as automobiles, helicopters and aircrafts. Uncertainties should be taken into account for credible predictions of quantities of engineering interest of such systems (such as internal stresses, vibration levels). Uncertainties in complex systems include (a) parametric uncertainty (e.g.
The RILEM Multi-scale Modelling Course for Concrete (MMC2) provides the opportunity for participants to become familiar with modelling cementitious materials at four different levels of detail. Different ways of schematization and numerical approaches are considered to simulate the chemical, physical and mechanical behaviour of cementitious materials.
EML Special Issue on 3D Assembly by Cutting, Bending and Folding
When patterned with different materials, gradients or cut-outs, thin structures such as sheets and rods can bend or fold either spontaneously or by actuation in response to a force or stimulus to form a pre-designed three dimensional structure. This special issue addresses the design and mechanics of these structures with a special emphasis on programmability and non-linearity.
Manuscript Submission:
The Department of Electrical Engineering at Stanford University (http://ee.stanford.edu/) invites applications for a tenure-track faculty appointment at the junior level (Assistant or untenured Associate Professor) in the broadly defined field of electrical and computer engineering. The department is especially interested in candidates in computer architecture, embedded systems, autonomous systems, and energy systems.
