?????????????40*1810*8000??q550qd???????????
???????????????????????????????????????????<BR>1?????????????1.95??105MPa???????????????????????????????<BR>??1.96 19.3 19.1??/3=1.93??105MPa?? <BR>2?????????????????μ???????????????<BR>??L=P*L*(1-e-(kx ???))/(kL ???)/Ay/Eg<br><br>??????????????????68*2200*6000<BR>70*2200*6000<BR>72*2200*6000<BR>74*2200*6000<BR>76*??
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1?????????????1.95??105MPa???????????????????????????????
??1.96 19.3 19.1??/3=1.93??105MPa??
2?????????????????μ???????????????
??L=P*L*(1-e-(kx ???))/(kL ???)/Ay/Eg
??????????????????
68*2200*6000
70*2200*6000
72*2200*6000
74*2200*6000
76*2200*6000
78*2200*6000
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?????????????40*1810*8000??q550qd???????????????
