Configuration de test
Matériau par impression 3D
3D printing, also known as additive manufacturing (AM), refers to processes used to synthesize a 3D object in which successive layers of material are formed under computer control.
À propos de ce matériau
(En anglais seulement) 3D printing, also known as additive manufacturing (AM), refers to processes used to synthesize a 3D object in which successive layers of material are formed under computer control. Objects can be of almost any shape or geometry and are produced from digital 3D models. There are seven categories of AM processes: Binder Jetting, Directed Energy Deposition, Material Extrusion, Material Jetting, Powder Bed Fusion, Sheet Lamination and Vat Photopolymerization. 3D printing materials typically range from plastic to metal. Recently, many research group works on the 3D printing of biomaterials (typically cell-seeded hydrogels) put focus on their use for tissue reconstruction. Mechanical testing can be used at various stages of the process, e.g. in the evaluation of the mechanical properties of the raw material, the mechanical evaluation of the meshing structure and the mechanical evaluation of the 3D printed object.
Configurations de test (20)
Configuration de test
Tension
Configuration de test
Compression Non-Confinée
Configuration de test
Indentation (Raideur)
Configuration de test
Friction
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Cartographie 3D d'épaisseur
Configuration de test
Torsion
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Cisaillement
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Analyse Mécanique Dynamique
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Indentation (dureté)
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Profilométrie 2D
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Profilométrie 3D
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Contrôle de la temperature
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Positionnement (manuel angulaire)
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Capteurs analogues externes
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Corrélation d'images digitales
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Flux de caméra
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Positionnement (manuel)
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Positionnement (X Auto)
Configuration de test
Positionnement (XY Auto)
Études de cas (1)
Étude de cas
Impression 3D cryogénique d'hydrogels très mous
Vidéothèque
Voir : Profilométrie 3D d’un plateau tibial SawBoneMapping and analysis · 0:24
Profilométrie 3D d’un plateau tibial SawBone
Démonstration de profilométrie 3D sur un plateau tibial SawBone avec le Mach-1.
Ressources associées (5)
FAQ
Qu'est-ce que le module d'Young E?
Propriété mécanique intrinsèque d'un matériau indépendant de sa géométrie. Correspond à la pente du stress par rapport à la contrainte pendant une compression non-confiné lorsqu'on tiens compte de la géométrie de l'échantillon.
Module de laboratoire — Compression non confinée de disques d’hydrogel
Comment fonctionne le modèle élastique en indentation "Elastic Model in Indentation"?
(En anglais seulement) This tool allows for the computing and visualizing of the shear modulus (MPa) and the Young’s modulus (MPa) from an indentation test performed using a spherical indenter (Figure 1). This model is well adapted for the mechanical characterization of samples (with critical diameter (width) at least 5 times the indenter diameter) bonded on a flat rigid support (at least 10 times stiffer than the sample), for example: any sheet of material lying on a rigid chamber base (limited sliding at the interface can be assumed) or a cartilage layer attached to a thick sub-chondral bone. A user license is required to obtain the results of the elastic model in indentation (Software Add-On, contact Biomomentum to obtain your license).
Results analysis is performed considering the indentation mechanics of an infinitely wide elastic layer bonded to a rigid half-space which has been developed as a model for the layered geometry of cartilage and subchondral bone (Hayes et al., 1972). (Figure 2) shows a schematic representing the modeled situation.
Many parameters need to be specified in order to calculate the different material properties.
1. Indenter Shape is:
- Spherical
- Plane-Ended Cylindrical
2. Indenter radius in mm.
3. Poisson ratio can be selected from a drop-down list (Figure 3)
4. Position @ contact is – defines the position of the left cursor:
- to be curvefit – will automatically find the position contact which will give the smallest mean squared error (mse)
- the value at t0 – will automatically take the position contact at the start of the curve
- the following value (mm) – the user need to specify the value in the corresponding field next to the drop-down list
- cursor position – the user can drag the left cursor to the wanted position contact
5. Sample thickness is the:
- position @ contact – will automatically find the position at contact (position of the left cursor)
- following value (mm) – the user need to specify the value in the corresponding field next to the drop-down list
6. Curvefit is up to – defines the position of the right cursor:
- peak load – will automatically take the position of the peak load
- delta load (unit) – the user need to specify the value of the desired delta load in the corresponding field next to the drop-down list
- delta position (mm) – the user need to specify the value of the desired delta position in the corresponding field next to the drop-down list
The error on the estimation of the best curve representing the stress relaxation curve is calculated using the root of the mean squares (RMS) method and is displayed under “mse”. For example, (Figure 4) shows parameters used for the “Normal Indentation” (Mach-1 Motion) function in an indentation testing protocol on ovine articular surfaces. Corresponding results are shown in (Figure 1).
Spherical Indentation Guide – Mach-1 Mechanical Tester – Biomomentum
Mach-1 Analysis – Modèle élastique en Indentation – Paramètres
Mach-1 Analysis – Modèle élastique en indentation – Poisson ratio choix
Mach-1 Analysis-Modèle élastique dans l’indentation–Cartilage & os sous-chondral
Comment fonctionne le modèle "Sinusoid"?
(En anglais seulement) This feature is used to obtain the Frequency, Amplitude and Offset of a sinusoidal signal. A blue line displays the theoretical sinusoid with the Frequency, Amplitude and Offset obtained (Figure 1). The values of the Frequency, Amplitude and Offset are indicated in the "Results" field. The units vary according to the graph’s axes.
This feature can also be used for sinusoidal stimulus-response analysis. Sinusoidal stimulus shall be selected on the x-axis and the sinusoidal response on the y-axis. The Modulus is the ratio of the response Amplitude over the stimulus Amplitude. The Phase is the phase difference between the response and the stimulus. The Modulus’ is computed as the Modulus*Cos(Phase) and the Modulus” is computed as the Modulus*Sin(Phase). A blue line displays the theoretical sinusoidal stimulus-response with the Frequency, Modulus and Phase obtained (Figure 2). The values of the Modulus and Phase are indicated in the “Results” field. The units vary according to the graph’s axes.
One use for this feature would be to compute material properties by multiplying the Modulus obtained by the appropriate geometric factors. For example, the Young’s Modulus can be obtained during uniaxial compression or tension on cylindrical sample with t/pi*r2 as the geometric factor, t is the thickness and r is the radius of the sample.
Mach-1 Analysis – Sinusoid – Exemple d’analyse stimulus-réponse
Qu'est-ce que la viscoélasticité?
Propriété d'un matériau présentant des caractéristiques visqueuses et élastiques sous déformation. Un tel matériau montrera un comportement mécanique dépendant du temps.
LAB MODULE – Torsion of Disk-Shaped Samples – Student Version
Qu'est-ce que l'élasticité?
Propriété d'un matériau à déformer sous déformation ou contrainte et revenir à sa forme originale lorsque la contrainte est relâché.
Module de laboratoire — Torsion de l’os
LAB MODULE – Unconfined Compression of Hydrogel Disks – Student Version