Aller au contenu

Chambre de compression confinée (D = 6mm)

MA744

Une chambre de test pour matériaux biphasiques

UGS : MA744 Catégories: ,

(En anglais seulement) Confined compression testing measures the capacity of the material to withstand axial compressive loads without expanding perpendicularly to the force. Confined compression tests are usually performed on biphasic materials (one phase being liquid) (e.g. poroelastic materials). This chamber is made of a clear tube (internal diameter D = 6.18 mm) which allows visualization of the sample during compression. The disk-shaped sample is compressed by a sliding piston D=6.175mm and the liquid phase can be expelled through a porous disk (40 microns pore size). The kit also contains two 6-mm biopsy punches and a syringe to release the sample.

  • Compatible avec une utilisation en solution physiologique saline.
  • Facile à assembler et à monter sur le testeur
  • Fait d’un matériel transparent pour faciliter l’assemblage
Matériaux

Polycarbonate Clear Tubing, Stainless Steel 316L (Porous Disk, Pore Size 40 microns)

Diamètre

6.175 mm (diamètre interne)

Fixation du haut

Vis 1/4-28

Documents et ressources (3)

Configurations de test (1)

FAQ

Qu'est-ce que la poroelasticité?
Propriété d'un matériau élastique ou viscoélastique avec une phase fluide libre incompressible. Lorsqu'un tel matériau est mis sous le stress, le fluide interstitiel est relâché de la matrice solide. La friction générée par le mouvement du fluide à travers la matrice poreuse affecte le comportement mécanique d'un tel matériau. Ces matériaux sont normalement testés dans un bain de fluide.

Mach-1 Analysis – Modèle poroélastique en compression non-confinée – Paramètres

Mach-1 Analysis – Modèle poroélastique en compression confinée – Paramètres

Mach-1 Analysis – Modèle poroélastique en compression confinée – Exemple

Mach-1 Analysis – Modèle poroélastique en compression non-confinée – Cartilage

Mach-1 Analysis – Modèle poroélastique en compression non-confinée – Exemple

LAB MODULE – Torsion of Disk-Shaped Samples – Student Version

Comment fonctionne le modèle poroélastique en compression confinée "Poroelastic Model in Confined Compression"?
(En anglais seulement) This tool allows for the computing and visualizing of the aggregate modulus (MPa), the permeability (mm2/MPa·s) and the mean square error (RMSE) of the fit calculated from a “Stress Relaxation” curve (load or force vs. time) in confined compression (Figure 1) on a disk sample. The curve is fitted to the linear biphasic model (Mow et al., 1980 or Bursać et al., 1999) in order to obtain the mechanical properties of the disk. Sample radius, strain and sample thickness need to be specified.

This model is well adapted for the mechanical characterization of samples containing a liquid fraction and a solid matrix, for example: cartilage or gel samples. A user license is required in order to obtain the results of the poroelastic model in confined compression (Software Add-On, contact Biomomentum to obtain your license).

Mechanical properties can be obtained from the stress relaxation curves obtained under confined compression such as the aggregate modulus (HA) and the hydraulic permeability (k). The aggregate modulus is a measure of stiffness of the sample at equilibrium while the hydraulic permeability is the ability of the fluid to flow through the cartilage matrix.

For example, (Figure 2) shows parameters used for the “Stress Relaxation” function in a confined compression testing protocol on human cartilage disks. Corresponding results are shown in (Figure 1).

Mach-1 Analysis – Modèle poroélastique en compression confinée – Paramètres

Mach-1 Analysis – Modèle poroélastique en compression confinée – Exemple

Qu'est-ce que le module aggrégat?
(En anglais seulement) The aggregate modulus (Ha) corresponds to the stiffness of the material at equilibrium when fluid has ceased flowing through it in a confined compression test configuration. The aggregate modulus can be calculated from Young's modulus (E) and the Poisson ratio (v) using the formula Ha=E(1-v)/[(1+v)(1-2v)].

Besoin d’aide pour choisir un accessoire ?

Parlez à notre équipe

Report a problem with this page

Your email is used only to follow up on this report.

Screenshots (optional)

Click this area and paste a screenshot, or drag files here. Up to 3 PNG, JPEG or WebP images; 5 MB per image. Hide confidential information first.

Please do not include passwords or customer information. Reports and screenshots are private.