In the first season 2 episode (it's called Serpent's Lair), Daniel gets hit and his shirt is ripped open and bleeding rather badly. He makes the others leave him behind. He gets into the sarcophagus somehow and is healed. Now, at about 34 minutes into the episode (no ads), the sarcpohagus opens and where the rip was, there is now no trace of the rip at all. In subsequent episodes, whenever somebody's wound is healed by a sarcophagus, the material is never healed as well, so unless this very special sarcophagus went to sewing school, I see no reason for there to be no rip.