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The effects of boron dopings and boron grafts on the mechanical properties of single-walled carbon nanotubes

Submitted by haiyang song on
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The effects of boron doping and boron grafts on the mechanical behaviour of armchair (6, 6)

and zigzag (10, 0) single-walled carbon nanotubes (SWCNTs) under axial loading are

investigated using the molecular dynamics (MD) simulation method. The results show that

Young’s moduli, the tension strength, the buckling loads and the buckling strains of SWCNTs

decrease after functionalization. The influences of the distribution density of functionalization

on Young’s moduli of SWCNTs are also systematically studied. The results show that Young’s

Concrete Damaged Plasticity

Submitted by looyong on
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Hi, I am currently trying to model a RC connection and I am using Concrete Damaged Plasticity, CDP, to model my concrete. WIthin this model, you would need to specify the tension damaged against strain or displacement. I have looked through the literature, there are many papers that talk about the damage, but they do not show how the tension damage was obtained.

Help!!! How to calculate the consistency parameter by consistency condition (potential function) of plasitc flow

Submitted by michael_chn on
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Plasticity
plastic flow
Potential Function
consistency parameter
consistency condition

hi, there!

I have read a "Manual for LS-DYNA Wood Material Model 143"(website: http://www.tfhrc.gov/safety/pubs/04097/sec150.htm#toc_1_5_1 and http://www.tfhrc.gov/safety/pubs/04097/append_e.htm).

I have two question:

Force Matrix for Transient Thermal Analysis

Submitted by shrimad on
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Computational Mechanics Forum
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Transient thermal analysis

Hi,



I have developed a 2D transient thermal analysis FE code which doesn't
seem to be correct. I am sure there is a conceptual problem in the
formulation itself which I have not been able to understand and could
not find concrete information in books.



I am putting up the question in a very simplified form so as to address the correctness of the formulation.



Let's say we have a square of unit length with 4 nodes at each corner
(Q4 element). Initial temperatures are specified as 100 for all nodes

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