# stiffness

## Cable bending stiffness: new test data

A new paper by Chen et al.: Experimental research on bending performance of structural cable. In: Construction and Building Materials, 15 October 2015, Vol. 96, pp. 279-288. Equivalent bending stiffness has been obtained applying a force at midspan of simply supported, about one meter long, specimens. A number of tensile force levels have been applied (including zero). Non-linear force-deflection curves are shown.

## "A stiffness degradation model for cracked multidirectional laminates with cracks in multiple layers"

http://www.sciencedirect.com/science/article/pii/S0020768314004843

## Anisotropic stiffness of isotropic material

Dear colleagues,

Consider a simple non-linear elastic material with stress given as

σ = D(εdev) εdev + B εiso

where εdev is the norm of εdev, D is a function of εdev and B is constant. The material is isotropic since the principal directions of  σ and ε will coincide.

If we differentiate σ wrt ε to obtain the material stiffness the form of the stiffness tensor will be

## Non Linear Analysis Ansys

When Working on Ansys Non Linear Static Structural Analysis, I couldn't comprehen while defining and assigning material properties to corrosponding bodies.

When I give different random values for density in Engineering Data and runing the jobs parallely the results look SIMILAR for all the independent values, I couldn't fish out on what basis do the software is giving out results.

## Ansys Non Linear ANALYSIS

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When Working on Ansys Non Linear Static Structural Analysis, I couldn't comprehen while defining and assigning material properties to corrosponding bodies.

When I give different random values for density in Engineering Data and runing the jobs parallely the results look SIMILAR for all the independent values, I couldn't fish out on what basis do the software is giving out results.

## Clamping with a specific stiffness in Abaqus

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Hello,

is there a simple possibility to set a boundary condition to clamp my sheet in Abaqus with a specific stiffness?

Usually you use the "encastre"-boundary condition. But I would like to give this condition a specific stiffness.

## how to set the absolute contact stiffness when considering cohesive zone material (CZM)property

I'm simulating the interface between a steel plate and the fire proof coatings covering the steel plate. The elements i use in the simulation is contact 173 with a material property of debonding,which is defined as cohesive zone model.(CZM)

CZM in ansys provides  TBDATA such as maximum contact stress,contact at the completion of debonding, but what's the problem is that I failed to set the initial contact stiffness. it's true that ansys provides FKN to define the contact stiffness, but it's just a stiffness factor.

## Stiffness of a beam

Hi,

As a part of my research, I would like to break down a simply supported beam to two beams shown in the attachement.  I expect to remove the bond and use of springs for transforming deformation of upper beam to lower beam. What could be the stiffness of springs which could be used in new model?

Parisa

## Stiffness matrix from ANSYS Classic

I want to get stiffnes matrix from ANSYS Classic. I used substructure analysis and using list->other-> super element data and got stiffness matrix of whole structure. But I want to get stiffness matrix of individual elements. Can I do it in ANSYS Classic?

## How to reduce the stiffness of force versus deflection linear curve at elastic phase analysed with ABAQUS?

Dear Abaqus Users,

## Journal Club Theme of 1 May 2008: Mechanical Behaviors of Polymer-matrix Nanocomposites

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1. Definition of nanocomposites Nanocomposites are a novel class of composite materials whose reinforcements have dimensions in the range of 1-100 nm. Although nanoscale reinforcements (or nanofillers) of nanocomposites have different kinds of fillers such as nanofibers, nanowires, nanotubes and nanoparticles etc, their mechanical behaviors have some common features.