sample,length_mm,diameter_mm,break_d,break_d,Tr_Mpa,r_area_mm2
ash1,79,2.22,2.22,,9.347286212,3.87064215
ash2,74,1.06,1.45,1.15,10.29340824,1.651250938
ash3,45,1.23,1.12,,22.77667792,0.9851744
ash4,57.5,0.68,0.54,0.4,19.76723394,0.22901535
ash5,71,1.21,0.83,0.78,36.24653382,0.541044838
ash6,75.5,0.83,0.88,0.69,23.84270556,0.6081944
ash7,34,0.57,0.57,,9.193930654,0.255168338
ash8,70,1.22,1.24,,23.8963041,1.2075926
ash9,28,0.86,0.86,,12.92042268,0.58086335
ash10,45,1.7,1.7,,11.79169143,2.26973375
ash11,54,1.38,1.87,1.92,5.290969,2.746377838
ash12,63,2.18,2.16,,13.56022642,3.6642456
ash13,76,2.22,2.22,,7.088487888,3.87064215
ash14,87,2.31,2.65,,7.411750967,5.515295938
ash15,73,2.44,1.41,,11.07080524,1.561404038
ash16,98,0.98,1.07,,19.66578645,0.899175838
ash17,57,0.91,0.56,,13.6463148,0.2462936
ash18,53,0.23,0.24,,22.06129414,0.0452376
ash19,39,0.35,0.28,,31.60455651,0.0615734
ash20,22,0.41,0.2,,76.30113003,0.031415
ash21,35,0.26,0.24,,17.24229402,0.0452376
ash22,50,0.35,0.11,,94.4961019,0.009503038
ash23,32,0.15,0.19,,45.42883382,0.028352038
ash24,20,0.36,0.24,,100.7568925,0.0452376
ash25,39,0.54,0.54,,29.87136015,0.22901535
ash26,47,0.41,0.3,,29.44099599,0.07068375
ash27,36,0.66,0.43,,46.70289492,0.145215838
ash28,44,1.27,1.07,,20.0105466,0.899175838
ash29,50,1.91,1.91,,10.62361456,2.865126538
ash30,42,2.13,2.89,,8.045240387,6.559530538