The path creation is accomplished by the shape memory material by {HEAD ~ several means} such as fracturing, exploding, imploding, puncturing, peeling, tearing, {TAIL ~ shearing}, rupturing, splitting, separating, debonding etc 
The path creation is accomplished by the shape memory material by { HEAD ~ several means } such as fracturing , exploding , imploding , puncturing , peeling , tearing , { TAIL ~ shearing } , rupturing , splitting , separating , debonding etc
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH