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Non zero initial accelerations in a dynamic computation on Abaqus

Submitted by mtannous on

I want to start a dynamic calculation in Abaqus in which, for every node, I specify the displacements, velocities and accelerations. I know that by the *IMPORT command, I can start a calculation with a deformed mesh, and that the velocities can be defined by in the *INITIAL CONDITIONS, but how to deal with non zero user defined accelerations? Have any body did that? Is it possible with a subroutine?

Thanks for any help

Viscoelastic material model in Abaqus

Submitted by Sajib Saha on

Hi,

I am trying to model asphalt concrete as viscoelastic mayterial in abaqus. As I have seen from past studies, people have used prony series parameters for time domain viscoelasticity and additionally also used elastic modulus from resilient modulus test data. As I already have dynamic modulus test data, I can calculate prony series parameter from it but the problem is with resilient modulus. Do I need to run resilient modulus test again to get the elastic parameter in abaqus or is there any other way to work with dynamic modulus test?

Global dimming and Global warming, hazardous effect of green house gases on our planet earth

Submitted by Omololu Oyebola on

Global dimming is simply described as the reduction in the amount of solar radiation reaching the earth. This is caused by the following, increased amount of particulate matter and pollutants such as carbon monoxide, sulphur dioxide and soot. Due to the increase in energy demand, fossil fuel combustion has led to the emission of green house gases which causes global dimming. These subatances coalease with water droplet on the cloud, as the pollution increases more bonds are formed and a reflective layer is formed the impedes solar radiation from reaching the surface of the earth.

Topic 33: Discuss the future of Biomass as an Alternative Source of Energy- Risk and Challenges

Submitted by victor.adukwu on

Biomass is currently one of the latest sources of renewable energy. Biomass consists of plant matter that is specifically grown for its ability to generate heat or electricity. Mostly this would mean that Biomass consists of dead plant matter, but plants that are still alive can also generate heat and are therefore also included in the term Biomass.

Mini-symposium “Fracture and Instabilities in Soft Materials” on ICF13

Submitted by Wei Hong on

We are organizing a mini-symposium, "Fracture and Instabilities in Soft Materials", on the 13th International Conference on Fracture, which will be held during June 16-21, 2013 in Beijing, China. We would like to invite you to submit an abstract on your recent research findings in related areas. The deadline for abstract submission has now been extended to October 31, 2012.  Instructions on abstract submission can be found at http://www.icf13.org/. The conference anouncement is at http://www.icf13.org/wordpress/wp-content/uploads/2012/08/final0830.pdf.