Gabarit de découpe d’échantillon

(En anglais seulement) Dogbone-shaped samples are usually prepared for tensile testing. This shape will minimize the risk of failure inside the grips and make the tensile stress concentrate in the gauge section. A rupture in the gauge section is normally attributed to the sample material reaching its maximum tensile strength resistance. When dealing with relatively strong sheet material like rubber or plastic it is possible to use a complete metallic die which can produce the shape sample in one step using a hand press or tapping with a hammer. When dealing with very weak biological or biomaterial samples like a skin or sheet of hydrogel, these one-step die do not create a straight border cut to the sample. This cutting die kit are in fact very sharp razor blade spacers used to create a controlled width in the gauge section of the sample. Remaining shape is then created manually using a scalpel.