Blog posts
Open webinar on Metamaterials, Massimo Ruzzene, May 14, 5:00PM-7:30PM, CET
May 14, 2021, 5:00PM-7:30PM, CET
Quasi-crystalline Structural Composites:
higher order symmetries and vibration localization
Massimo Ruzzene
P.M. Rady Department of Mechanical Engineering
Smead Aerospace Engineering Sciences
University of Colorado Boulder, Boulder CO, USA
Tensile Testing Concepts & Definitions
Tensile tests are used to determine how materials behave under tension load. In a simple tensile test, a sample is typically pulled to its breaking point to determine the ultimate tensile strength of the material. The amount of force (F) applied to the sample and the elongation (∆L) of the sample are measured throughout the test.
Mechanics to explain tsunamis---Rosakis and co-workers in PNAS
Ares Rosakis and collaborators across three other institute have just published a fascinating account of a rather unexpected mechanism for generating tsunamis. The paper, published in PNAS, is attached with this post.
The associated press-release provides a compelling lay-person summary: https://www.caltech.edu/about/news/contrary-to-previous-belief-strike-s…
Graduate research opportunity for PhD students-Stevens Institute of Technology
There is a Ph.D. position ( guaranteed paid research assistant for two years ) in the Energy, control, and Optimization (ECO) lab for Fall 2021 in the Mechanical Engineering department at Stevens Institute of Technology.
The project is related to the fundamental study of radiation heat transfer in thin-film nanomaterials. Prior computational knowledge and experience with heat transfer in nanomaterials are required. Being familiar with FDTD, COMSOL, MATLAB, and Optimization algorithms is a Plus.
Global Composites Experts Webinar by Dr. Pascal Hubert
cdmHUB invites you to attend the Global Composites Experts Webinar Series.
Title: Sustainable Manufacturing of Composite Materials
Speaker: Dr. Pascal Hubert
Time: 5/13, 11AM-12PM EST.
Please go to https://www.purdue.edu/cmsc/events/2020-webinars/ to register for this webinar.
Young’s Modulus, Tangent Modulus, and Chord Modulus
This blog post covers the description and determination of Young’s modulus, tangent modulus, and chord modulus. These properties, commonly used for product and material specification, can be calculated by subjecting a specimen to uniaxial force, measuring its stress and strain properties, and generating a stress-strain curve. The accuracy of the modulus determination depends on the precision of the load and strain measurements.
On Nye's Lattice Curvature Tensor
We revisit Nye's lattice curvature tensor in the light of Cartan's moving frames. Nye's definition of lattice curvature is based on the assumption that the dislocated body is stress-free, and therefore, it makes sense only for zero-stress (impotent) dislocation distributions. Motivated by the works of Bilby and others, Nye's construction is extended to arbitrary dislocation distributions. We provide a material definition of the lattice curvature in the form of a triplet of vectors, that are obtained from the material covariant derivative of the lattice frame along its integral curves.
Elastodynamic Transformation Cloaking for Non-Centrosymmetric Gradient Solids
In this paper we investigate the possibility of elastodynamic transformation cloaking in bodies made of non-centrosymmetric gradient solids. The goal of transformation cloaking is to hide a hole from elastic disturbances in the sense that the mechanical response of a homogeneous and isotropic body with a hole covered by a cloak would be identical to that of the corresponding homogeneous and isotropic body outside the cloak.
Using Abaqus CZM, How can I get crack length for each increment?
When using CZM for crack propagation, for each CZM element, once the separation delta > delta_c, the adhesive is completely damaged, cannot transmit stress. delta_c is the separation on the right side of the bilinear or trapezoidal models. How can I get the length of the crack for each increment of applied displacement or load? I can see that the totally damage element disappear from the Visualization but I need a better way that gives me crack length, not just a picture that shows the crack longer for each increment.