Dear fellow iMechanicians,
Here is our recent paper that studies and models the rheological behavior of PLA deposited by 3D printing and allows to highlight the important process parameters than enable a full healing of the interface between printed layers.
Abstract
Dear members of iMechanica, We are very pleased to announce the good health of the first overlay journal in Solid Mechanics, the so-called "Journal of Theoretical, Computational and Applied Mechanics" Journal of Theoretical, Computational and Applied Mechanics" which is a scholarly journal, provided on a Fair Open Access basis, without cost to both readers and authors. The Journal aims to select publications of the highest scientific caliber in the form of either original research or review in Solid Mechanics.
The new model of truss element is based on the same stress-strain curves of tension, compression, and shear with the hexahedron element under the equivalent external force. Comparing and analyzing a simply supported elastoplastic concrete beam with initial cracks by using the new element method and the finite element method, it can be found that the load-displacement curve, the load-crack opening displacement curve, the contour of the displacement under the various loads, and the distribution of the horizontal normal stress under the maximum load are all in good agreement.
For the plane stress problem and the spatial problem of the elasto-plastic analysis of concrete, a new truss element model is presented by using the deformations under the equivalent external forces are the same. Some examples is given, which is in good agreement with the calculation results of the solid element.
(Note: The model in this article is the world's top concrete model, much better than the concrete model provided by Ansys itself.)
The transition between necking-mediated tensile failure of glasses, at elevated temperatures
and/or low strain-rates, and shear-banding-mediated tensile failure, at low temperatures and/or
high strain-rates, is investigated using tensile experiments on metallic glasses and atomistic simula-
tions. We experimentally and simulationally show that this transition occurs through a sequence of
macroscopic failure patterns, parametrized by the ultimate tensile strength. Quantitatively analyz-
Understanding the fracture toughness of glasses is of prime importance for
science and technology. We study it here using extensive atomistic simulations in
which the interaction potential, glass transition cooling rate, and loading geometry
are systematically varied, mimicking a broad range of experimentally accessible
properties. Glasses’ non-equilibrium mechanical disorder is quantified through
Ag, the dimensionless prefactor of the universal spectrum of non-phononic
We developed an inverse design method for constructing 3D reconfigurable architected structures — we synthesized modular origami structures whose unit cells can be volumetrically mapped into a prescribed 3D curvilinear shape followed by volumetric shrinkage for constructing modules. After modification of tubular geometry, we searched modular origamis’ geometry and topology for target mobility using a topological reconstruction of modules.
Traditionally dynamic analysis is done using Newton’s universal laws of the equation of motion. According to the laws of Newtonian mechanics, the x, y, z, space-time coordinate system does not include a term for energy loss, an empirical damping term “C” is used in the dynamic equilibrium equation. Energy loss in any system is governed by the laws of thermodynamics. Unified Mechanics Theory (UMT) unifies the universal laws of motion of Newton and the laws of thermodynamics at ab-initio level.
