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reading nodal values (EFENRRTR) into a UMAT routine

Submitted by jodavies03 on

Hi,



I am using the VCCT method to model crack propagation and I am finding the value of G/Gc is too large for any sensible time step (1e-25).



I am attempting to incorporate a time incrementation scheme into my UMAT which monitors EFENRRTR and modifies the time step (or PNEWDT) according to it's value.



Nonlinear vibration of a nanoplate embedded on a Pasternak-type foundation using nonlocal continuum theory

Submitted by Payam Soltani on

Nonlinear vibration of a nanoplate embedded on a Pasternak-type foundation using nonlocal continuum theory

BY: Payam Soltani, V. Kamali , O. Pashaei Narenjbon,  A. Farshidianfar 

Abstract:

Nonlocal plate continuum model is utilized to investigate the nonlinear vibration behaviour of a singlelayer

nanoplate. The isotropic nanoplate is assumed to be embedded on a Pasternak-type elastic foundation with the

Theoretical models to predict the flexural failure of reinforced concrete beams under blast loads

Submitted by Flavio Stochino on

The paper by Carta G. and Stochino F. presents two alternative approaches for the study of reinforced concrete beams under blast loads. In the first approach, the beam is modeled by means of Euler–Bernoulli’s theory and its elastic–plastic behavior is expressed through a new nonlinear relationship between bending moment and curvature. In the second approach, instead, the beam is idealized as a single degree of freedom system.

Simulation of fracture toughness test

Submitted by sufian163 on
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Hi, I am new to ABAQUS. I want to simulate the fracture toughness test to predict the behaviour of materials(brittle/ductile). Please help me how can I proceed?

If possible give me some guidelines and if you have any documents regarding this topic kindly send it to: sufian.ulsan [at] gmail.com

Thanks in advance for your valuable suggession.

Living cells behave as fluid-filled sponges

Submitted by emadmoeen on
Animal cells behave like fluid-filled sponges in response to being mechanically deformed according to new research published in Nature Materials.

Scientists from the London Centre for Nanotechnology at UCL have shown that animal cells behave according to the theory of ‘poroelasticity’ when mechanically stimulated in a way similar to that experienced in organs within the body. The results indicate that the rate of cell deformation in response to mechanical stress is limited by how quickly water can redistribute within the cell interior.

Maximum Time Step Problems in ABAQUS

Submitted by jodavies03 on

Hi,

 I hape a relatively simple question. I am trying to set a maxmimum time step for a job by the lines:

*Static, allsdtol=0, continue=NO

0.05, 1., 1e-25, 0.05

 

so I believe the maximum time step should be 0.05 giving me a minimum of 20 increments in the step in total. However the STA file below shows that the job starts at 0.05 and the appears to ignore the maximum time step command. Can anyone tell me why this occurs?