Partial- and
full-thickness cartilage lesions of the knee caused by trauma, disease or joint
instability are a common disorder affecting people of all ages. Implanted
cartilage replacements (ICR) have the potential to overcome the limitations of
conventional treatment methods and are a promising approach to restore
functionality of the joint. In spite of some success in engineering
cartilaginous tissue, inferior biomechanical and biochemical properties of ICR
compared to native articular cartilage (AC) and inadequate quality of fixation
I am trying to perform a response spectrum analysis of a tall tower. I work with abaqus 6.10, but i am unsure of how to define a spectrum. there is no spectrum radio button on the create amplitude menu... so i guess i have to edit the keywords.
does anyone have an example of how a spectrum can be defined? i'd be much grateful
Equilibrium theories for a continuum body may be formulated by either of the
following the classic paradigms: (1) We begin with the stress postulation(Cauchy’s formulation) and write down the kinematics, conservation laws, and
constitutive relations. In this way, one can obtain a system of field equations
which, presumably, can be solved upon specifying boundary conditions and
determine the equilibrium state of the body. (2) A second way is to start from
the energy postulation (Green’s
Iam presently using Ansys Composite Prepost (ACP) for composite material modelling. I looked at some tutorials and understood the procedure, but when I applied it to simple case of simply supported rectangular plate with uniform load, the results donot match the theoritical textbook results. I tried it in ANSYS Mechanical APDL, the results were exactly same with theoritical value. Iam unable to find the mistake. Is it possible to get the validation results for ACP similar to the validation results which are available for ANSYS APDL(provided by ANSYS ).
I am doing flow induced vibration analysis in pipe using ansys workbench. First i created fluent model and this output(solution) is couple with tranient structural setup. FInally the pipe gets displaced becuase of fluid pressure. After that i want to calculate the modes. So it is possible to couple transient structural solution to modal setup? I have tried but i didnt know how to couple modal analysis and transiest structural analysis. Please help me regarding in this.
If slip is the only mechanism of
plastic deformation of a crystal and Schmid law governs the slip
activity, the overall response of an aggregate of such crystals
features the normality rule of classical plasticity, see node/15347
for a rigorous recent proof. Any deviation from Schmid law is
referred to as a non-Schmid effect. In general, these effects may be
of two kinds: in addition to the resolved shear stress (on a slip
system), other stress components may influence slip activity or/and
the hardening of a slip system (representative examples for each kind
are described, for example, in Qin and Bassani(1992) and Spitzig
In the classical (rate-independent)
theory of metal plasticity, the plastic spin has been an issue of
research and debate for about thirty years. Judging by the content
of current publications on the topic (regarding modeling
possibilities, consequences and applications), it seems that the
concept has acquired a certain degree of acceptance, although no
rigorous justification, at theoretical level, has ever been provided.
In the attached preprint this matter is investigated starting from
The 2013 Timoshenko Medal paper "Completion and Closure on Failure Criteria for Unidirectional Fiber Composite Materials " by Professor Richard Christensen from Stanford University is published in the Journal of Applied Mechanics in its January issue, 2014. Professor Christensen will receive the ASME Timoshenko Medal at the IMECE conference in San Diego, CA, in November, 2013.
I have used XFEM in Abaqus for static analysis. I use traction-separation cohesive behavior with XFEM.
I want to use XFEM in implicit dynamic analysis. I am using Abaqus version 6.12. As far as I know xfem was allowed only with static analysis in earlier Abaqus versions (6.9). I read that the newer versions have implicit dynamic analysis compatiblity with XFEM.
I am looking to recruit a new PhD student in the area of computational modeling of soft active materials. The position will begin as early as January 2014, or alternatively in September 2014. Requirements for this position including the ability to program in C++, knowledge of nonlinear finite element methods and continuum mechanics, and a good background in solid mechanics. If interested, please contact me at parkhs(at)bu.edu, with a copy of a CV and a description of your previous research experience.
Journal of Applied Mechanics just published the 2011 Drucker Medal Paper: Localized Compaction in Porous Sandstones, authored by Profesor John Rudnicki from Northwestern University.
my name is mohamad. I am phd student in mechanical engineering. I want to use of total lagrangian formulation for analysis of a cantilever. my difficulty is on implementation of newton raphson method and incrementing load. my code does not converge. can you help me. if there is a simple code I was wondering if someone aware me.
We introduce a geometric framework to calculate the residual stress fields and deformations of nonlinear solids with inclusions and eigenstrains. Inclusions are regions in a body with different reference configurations from the body itself and can be described by distributed eigenstrains. Geometrically, the eigenstrains define a Riemannian 3-manifold in which the body is stress-free by construction. The problem of residual stress calculation is then reduced to finding a mapping from the Riemannian material manifold to the ambient Euclidean space.
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