Question: 3D implicit surface mesher
I want to mesh a 3D surface given as an implicit equation into triangle elements. For example, cos(x)+cos(y)+cos(z)+0.2=0 with -pi<x<pi, -pi<y<pi,-pi<z<pi. Is there any software can do it?
research
Prediction of arterial failure
We enhanced a bi-layer fiber-matrix microstructural arterial model with softening and analyzed the artery inflation under the internal pressure. Numerical simulations lead to the following three findings. Firstly, it is found that the fiber strength dominates the strength of the media layer. Secondly, it is found that the strength of the media layer dominates the overall arterial strength and plays the crucial role in the load-bearing capacity of arteries. Thirdly, it is found that residual stresses can increase the overall arterial strength significantly. The pre-existing compression in arteries delays the onset of rupture like the pre-existing compression in the pre-stressed concrete delays the crack opening.
torque
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Dear, I use the abaqus present , how can apply a tightening torque between an implant (screw) and the bone with abaqus......... thank you ¶
Fiber Composites Failure Criteria
A new failure criterion has been formulated for fiber composite materials. It is the anisotropic counterpart of a recently derived isotropic criterion. The targeted applications are for carbon fiber, polymeric matrix (or equivalent) types of materials.
Buckling behavior of metal film/substrate structure under pure bending
Many studies on the thin film/substrate structure and its failure mechanism were reported in recent years. The direct experimental results of thin film/substrate structure by scanning electron microscopy (SEM) presents an intriguing problem:there exists a buckling failure mechanism at the lateral edge of metal film under pure bending. The qualitative theoretical analysis has been done on such buckling failure of thin film/substrate structure.
Tension Testing of Individual Collagen Fibrils
In a recent discussion it was suggested that it would be useful to perform tension tests on collagen fibrils. We have developed a MEMS-based experimental procedure that is capable of applying very large strains to individual collagen fibrils. The attached paper presents illustrative data; an upcoming paper will present much more data that illustrates the rich behavior of these fibrils during loading and unloading tests.
About piezoelectric resonance.
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For 31 mode piezoelectric plate. I have measured it's electric impedance spectrum (curve of Log IZI~ Frequency). I found that, when I used this plate for a piezoelectric sensor to receive mechanic signals. the maximum output occured at antiresonance frequency; For example, for piezoelectric hydrophone or receiving-type piezoelectric transducers, It works at antiresonance frequency (at the maximum electric impedance).
modeling a composite tube using ansys
hi everybody,
i am working with ansys and trying to madel a composite tube i have chosen element "solid 46" the first problem i faced is in the "material model" "orthotropic material" i am working with 2d composite materials (plane stress) (i have Ex Ey Gxy)
in ansys for an orthotropic material we need to fill also Ez Gxz Gzy wich we dont have in plane stress .
also what system of coordinates should i use cartesian or cylindrical.
and for the mesh is it importsnt the kind of mesh or i can choose betwwn free and mapped.
Ferromagnetic, Piezoelectric & Magnetoelastic Plates & Shells Vibartions
We are solved analytically and numerically by exact space treatment, proposed for elastic plates by Novatsky, the problems of determination of free vibrations of thin piezoelectric plates and shells frequences and mode comparision with Kirchoff theory, showing that in contrast to pure elastic case, the tables of frequences obtained by space treatment and by hypothesis are quite different. During last eight years you obtained the some results for magnetoelastic and ferromagnetic thin plates and shells, almost for all cases it is shown that Kirchoff hypothesis is not applicable.