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0Defining periodic R.E.V for nonlinear matrix filled with monodispersed particles The objective is to define the constraints that define representative elementary volumes (R.E.V) for a nonlinear...
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Impact of matrix/filler adhesion on properties on local damage and macroscopic behavior of propellants
0With industrial partner Arianegroup, we studied the mechanical behavior of three propellant-like materials. Two materials were made of an inert matrix with about 55% of sifted...
Impression 3D des polymères / 3D printing of polymers
0Nous avons organisé une journée sur l’impression 3D des polymères dans le cadre de la la Chaire internationale d’enseignement et de recherche « Design and Modeling of...
On necessary precautions when measuring solid polymer linear viscoelasticity with torsion rheometers
0The linear viscoelasticity and time-temperature superposition of solid polymers are often characterized using a torsion rheometer since it is a common equipment in polymer labs. Specimen...
Fracture of carbon-black filled elastomers submitted to monotonous loadings
0We are currently interested in the catastrophic failure of carbon-black filled and unfilled elastomers submitted to monotonous loadings (not fatigue). First part of this work is to...
Bouncing balls: An illustration of the viscoelasticity and temperature dependent behavior of polymers
0Why are we playing with rubber bouncing balls when we are kids ? Can metal or ‘plastic’ balls bounce as well ? And why do squash players warm up...
Shape memory property of amorphous polymer networks. Experimental characterization (2)
0In a previous post, I have presented some of our results obtained during stress-free shape memory recovery of amorphous polymer networks submitted to large deformation torsion tests....
Shape memory property of amorphous polymer networks. Mechanical model
0The shape memory property of amorphous polymer networks is the result of two intrinsic properties of these materials: 1) The viscoelasticity and 2) the time-temperature...
Shape memory property of amorphous polymer networks. Experimental characterization (1)
0I started working on the shape memory property of polymers at CU Boulder thanks to Professor Ken Gall who introduced me to the topic. Focusing...
Linear viscoelasticity of several carbon-black SBRs
0The linear viscoelasticity of several carbon-black filled SBRs were characterized by DMA tests on a DMAQ800 dynamic uniaxial tension machine from TA. Figure 1. Storage modulus...