文档介绍：PSI英文全称为Poundspersquareinch。P是磅pound,S是平方square,I是英寸inch。把所有的单位换成公制单位就可以算出:1bar≈=1000lb/=/()2=,要用到试验机来检测DensityofSlipPlanes Theplanardensityofthe(112)(110)planeandtheinterplanarspacingsforboththe(112)andthe(110)? (112)planardensity: 'vectorisshort,andthehighdensityplanesarethe"smoothest"forslip. Itwillhelptovisualizethesetwoplanesaswecalculatetheatomdensity.  The(110),withaheightequaltothelatticeparametera0andawidthequaltothediagonalofthecubeface,whichisÖ2 (height): Width: Thus,accordingtothegeometry,theareaofa(110)planewouldbe (1fortheatominthemiddleand4times1/4forthecorners), Theinterplanarspacingforthe(110)planesis Forthe(112)plane,,showingtheplaneandtheatomsitpassesthrough.  Thisplaneisalsorectangular,withabasewidthofÖ2 a0 (thediagonalofacubeface),andaheightofÖ3a0 (thebodydiagonalofacube).Ithasfouratomsatcorners,whicharecountedas1/4fortheportioninsidetherectangle(4x1/4)andtwoatomsontheedges,countedas1/2fortheportioninsidetherectangle(2x1/2).: Height: Hence,wecancalculatetheareaanddensityasforthe(110)plane. Theplanardensityandinterplanarspacingofthe(110)planearelargerthanthatofthe(112)plane,thusthe(110) m,直径为3mm的铝线,已知铝的弹性模量为70GPa,求在200N的拉力作用下,此线的总长度。,E为45GPa,a)求不至于使一块10mm´2mm的Mg板发生塑性变形的最大载荷;b)在此载荷作用下,该镁板每mm的伸长量为多少?3. 已知烧结Al2O3的孔隙度为5%,其E=370GPa。若另一烧结Al2O3的E=270GPa,试求其孔隙度。 -30%Zn黄铜板冷轧25%后厚度变为1cm,,试求总冷变形度,并推测冷轧后性能变化。5.