Professor YC Fung, the widely-recognized father of modern biomechanics, recently challenged the field by asking this fundamental question: “What axioms of the classical continuum mechanics have to be changed for biology?”
I did some preliminary study on free-standing self-assembled monolayer (only 1 nm thick). Bulge test was used to determine the elasticity and residual stress in the membrane. I just took the model from Prof. Vlassak's paper (J mater. Res 7,1992,3242). Althought the model could explain the data very well.
IF I have a 2-D slab (plate) which has some openings - can the XFEM prove advantageous over conventional FEM for such case?That is, can I use enrichment functions around the openings (as around the cracks).
Hi every one,
I think that there is a method for automatic failed element removal using UMAT subroutine, I mean that at every iteriation failed elements with the help of a failure criterion to be indicated and to its material behaviour to set to zero and this means that a path for crack propagation will form .... Anyway, if any body is intrested we can clarify this subroutine step by step for all of the visitors in this website, I mean that an open source subroutine to be expanded here.
Thank you,
Hi,
I am simulating failure of concrete in tension and compression on a concrete representative element volume. I have modeled mortar matrix and aggregate (inclusion) separately i.e my model consists of two material and assumed them as perfectly bonded. My question is, if I add interface zone between matrix and inclusion how will it effect my overall failre or can I neglect inerface.
With Warm Regards
Gouse
Hi,
I want to know what is the effect of coarse aggregate size or size of the aggregate on compressive strength of concrete.And similarly what is effect of aggregate size on tensile strength of concrete.
I have few papers which contradicts each other so I am confused.
With Warm Regards
Gouse
Dear All,
I have a problem simulating earthquake effect on a very simple structure. The structure is a 2 story steel plan frame structure. with lumped mass at its corners.
I am applying the Northbridge earthquake on it but I am getting very strange results.
I am applying the Material density beside the lumped mass at corners.
Both, eignvalues and frequencies and also responses are not correct.
Hello;
I have a problem of extracting structural damping coefficient of a sandwich plate type steel / polymer / steel. I have already entered the shear modulus of the polymer in ABAQUS G = G0 (iw) / (1 + iw) With the: *viscoelastic, frequency=TABULAR
I do not know if my approach is right?
My inp file has this form:
*NODE, NSET=ALLNODES, SYSTEM=R
..
*ELEMENT, TYPE=S4 , ELSET=THIN-SHELL1
..
*SHELL GENERAL SECTION,
ELSET=THIN-SHELL1 ,
Hi,
I am starting my research on mixed-mode fracture criterion. Are there any interesting papers or books to read on?
Thanks.
We know from fracture mechanics theories that fracture instability in a perfectly brittle material occurs when energy release rate (G) becomes equal or more than two times the surface energy (γ) of that material. The value of G = 2γ is known as fracture toughness Gc. This is the classical Griffith criteria of brittle fracture. Experimentally, however, we know that plasticity becomes eminent for most materials and this criteria does not work.
