Configurations de test
(En anglais seulement) Torsion refers to the twisting of a sample due to an applied torque. Various applications requires materials to withstand torsional stress. It is thus important to test this configuration since material torsional behavior can greatly vary from what is observed under a simple axial constraint. Various mechanical properties can be calculated under this configuration, e.g. the shear modulus, the rupture shear modulus, the yield shear strength, the ultimate (rupture) shear strength and the ductility. The sample could further be evaluated for its resistance to fatigue in torsion.
Voir : Module de laboratoire — Torsion d’échantillons en forme de disqueLab Modules · 9 chapitres · 21:26
Préparez les disques de caoutchouc et d’hydrogel, réalisez les essais de torsion et analysez les résultats.
Voir : Module de laboratoire — Torsion de l’osLab Modules · 9 chapitres · 24:50
Suivez le montage des échantillons, les essais de torsion et l’analyse du bois et de l’os.
Voir : Compression, cisaillement et torsionTissue testing · 0:35
Démonstration de compression, de cisaillement et de torsion avec le Mach-1.
(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
