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Educational iPad app on structural mechanics

Submitted by Julian J. Rimoli on
education
structures
Plasticity
buckling
dynamics
statics
truss
iPad
deformable bodies
game
I would like to share with fellow mechanicians an educational iPad app I recently developed. The name of the app is Truss Me! and the main goal is to help students, all the way from high school to college, to build intuition on how truss structures behave. The video below highlights some features of the app:
 
The app utilizes state of the art simulation techniques to provide the most realistic behavior for the structures.



How to get the update the local material coordinate in large deformation for hyperelasitc rubber-like materials?

Submitted by Jiang Chen on
education
hyperelasticity
large deformation
material coordiante
anisotropic hyperelasitc

Hello, 

I want to ask things about the updation of local material coordinate in large deformation. 

Does there exist two ways for this?

1. Polar decomposition of Gradient Deformation Tensor F to get the rotation tensor.

2. Update each basis vector of local material coordinate system using modified Gradient Deformation Tensor F_bar = F*J^(-1/3).

What I cared about is the second method, is the second method available?

Wish someone could help me, : ). Thanks!! 

Compatibility: Surface-Based Cohesive Behavior in UEL

Submitted by Lucy_E on
education
ABAQUS
interaction
UEL
cohesive behaviour
overlay

Hi all,

 

I have been trying to model the surface interaction between two blocks of material using surface-based cohesive elements (*cohesive behavior). This works well in ABAQUS CAE (standard) when I set the material properties as "Mechanical, Elastic" so no problem with that.

However, I would now like to use the material properties from a fortran code. To do this, I was planning on defining the elements using *UEL with an overlay to record all the values. Is this compatible with cohesive zone elements? 

 

Questions about tensors and matrices

Submitted by AP on
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tensor

Hello,

I am having questions with tensors. I know that not all matrices are tensor. Tensor is a homogeneous, linear and vector valued function. So my questions are:

 

  1. Are all 3*3 matrices tensors?
  2. Are all anisymmetric second order tensors orthogonal?
Thanks.

 

Analysis problem on ansys 14.5

Submitted by Nagarjun Singh on
education
elasticity

I am a student using ansys for solve problems but i have a problem "how to find at which force value the component will be fail". A ball has to pass through a cone and i am intrested to know that force value at which boll will be pass through cone nerrow section while boll diameter is large than small dia of cone.

 

Plz help me anyone ansys masters

Thanks dear frnd & sir... 

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