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Prediction of CTEs of orthotropic composites

Submitted by Gao Yunxin on

Hello

Are any analytical solutions for the effective CTEs (coefficent of thermal expansion) of orthotropic composites available?

I am trying to predict the CTEs of a resin matrix with Al reinforced fibers which have a rectangular cross-section (not a square). All the fiber in 90 degree direction. I know the volume fractions and the details of the rectangular cross section as well as the properties of the resin and Al. The CTEs in the two transverse directions are different.

 Thanks and regards

 Yunxin

Applying load on a Compact Tension specimen in Abaqus

Submitted by Chizyuka on

Hi there,

I have been trying to model fracture toughness test in abaqus but unfortunately I am faced with difficulties of how to apply the tensile loading on the compact tension model's pin holes. Most papers I have come across show only pressure being applied on the flat upper most edge of the test specimen instead of the pin holes. Please could there be someone out there who could show me how to apply this tensile loading right on the holes?

Thanks in advance. 

Tensile test under LS-DYNA

Submitted by Manaliac on

Dear all,

I would like to run a tensile test under ls-dyna of a mild steel  and
apply a 7000 N load to the dog bone specimen on a explicite scheme.

Unfortunately, I
have wild deformations ( and an error) on the nodes on edges where the
load is applied, so can you please tell me what are the importants
constants (like time termination, mass scale,...) and how to perform a
perfect run?

 

Have a good day,

 

Thank you

M.

PhD student recruit (Composite materials, Korea)

Submitted by mekchu on

It is pleasure to announce that there is an
opening for students who want to join a PhD course or combined master + PhD
course (Going to directly Ph.D. course without master thesis after B.S.) in
Department of Aerospace Engineering, GyeongsangNational University, South
Korea.

 

The successful candidate will do research
under the advise of Prof. Jin-Hwe Kweon in Structures and Composites Lab. Research areas include testing and finite element analysis of:

 

1. Composite Cylinder under hydrostatic
pressure,

Modelling of Sandwich plates in ABAQUS

Submitted by VINAY YADAV on
Choose a channel featured in the header of iMechanica

Hi,

I am learning Abaqus to model sandwich composite struture. If anyone has done that or has any tutorial for that, then please share.

Also I want to refer mathematical formulation of sandwich plates for dynamic stability analysis, please share.

 

Thanks,

Vinay

IIT Delhi