A. The most common challenges associated with tensile testing of soft biological tissues are specimen slippage and breaks near the jaw faces. For most delicate soft tissues, use pneumatic grips with either SurfAlloy® faces or smooth faces with low grit sandpaper. One of the key features of the pneumatic grips is the adjustable gripping pressure. Gripping force can be reduced to minimize jaw breaks or gripping force can be increased it if specimen slippage occurs. The SurfAlloy® faces or the use of sandpaper with smooth faces increase the surface friction between the specimen and the jaw faces, thereby reducing slippage. For other needs, Instron has a wide variety of jaw faces available to customize to various circumstances.
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