Can anyone guide me in clearing this doubt? I would like to get the values of normalized flow stresses Vs Strain rate for 304 L stainless steel and Ti-6Al-4V. This values will be used as an input for simulating fan blade-out event. This values will be used since this process involves higher velocities, higher deformations and it occurs in less time.
Below is the error i get when i try to solve shell model.
please explain why and how to over come this issue. my model contains nealry 8lakh element. It has contacts,rigid beam used for screws, distributed coupling for load,
***ERROR: THE PROBLEM IS TOO LARGE TO RUN WITH Abaqus. TYPICALLY THIS IS
CAUSED BY THE EXISTENCE OF A VERY LARGE ELEMENT SUCH AS A
SUBSTRUCTURE WITH A LARGE NUMBER OF RETAINED DOF, A LARGE CAVITY IN
Several methods have been proposed for numerical homogeniation of linear viscoelastic materials, mainly based on Laplace transform or on multilevel (FE^2) approaches. In this paper, we introduce a much simpler technique based on a discrete representation of the effective relaxation tensor related to the homogeneous medium, which can then be used to evaluate the constitutive law in the form of a convolution product. In practice, calculations on the RVE reduce to 3 transient simulations in 2D and 6 in 3D. More details in
Hello All,
I have written a user material behavior using VUMAT for hyperelastic materials.
I am validating VUMAT on a flat square plate.
1. The plate is subjected to uniaxial loading.
2. It has 4 structured quad elements.
3. One side of the plate is fixed and the opposite side is subjected to shell edge load.
4. The element is of type S4R.
The Department of Industrial Engineering at the University of Pittsburgh anticipates an opening for a postdoctoral associate starting January 2012. The position’s primary area of research will focus on mechanics of micro-scale deformation processes and characterizing the thermomechanics of deformation at micrometer length-scales. Applicants with a strong background in computational solid mechanics and crystal plasticity will be preferred.
Interested Applicants are requested to Email their CV to: ravishm [at] pitt [dot] edu
‚Source truncation and exhaustion: Insights from quantitative in-situ
TEM tensile testing' by D. Kiener and A.M. Minor (http://dx.doi.org/10.1021/nl201890s).
We recently published two papers that present an optimization method to design multi-layer composites with damping properties. The method consists in adding elastomeric layers in the composite. In this way, a multi-criteria optimization tool has been developed to determine the best geometrical and material properties of the composite: position of the elastomeric layers, layers thickness, ...
Two new books:
M. Nosonovsky and P.K.Rohatgi Biomimetics in Materials Science:
Self-healing, self-lubricating, and self-cleaning materials (Springer
Series in Materials Science, Vol. 152, 2011, Hardcover, ISBN
978-1-4614-0925-0)
M. Nosonovsky and B. Bhushan (eds.), Green Tribology Biomimetics, Energy
Conservation, and Sustainability (Springer Series: Green Energy and
Technology, 2011, Hardcover, ISBN 978-3-642-23680-8 )
