院内感染习题有答案

各种材料摩擦系数表材料名称静摩擦系数动摩擦系数无润滑有润滑无润滑有润滑钢-钢?0.15?0.1〜0.12?0.15?0.05〜0.1钢-软钢0.20.1〜0.2钢-铸铁0.30.180.05〜0.15钢-青铜0.150.1〜0.150.150.1〜0.15软钢-铸铁0.20.180.05〜0.15软钢-青铜0.20.180.07〜0.15铸铁-铸铁0.180.15?0.07〜0.12铸铁-青铜0.15〜0.20.07〜0.15青铜-青铜0.10.20.07〜0.1皮革-铸铁0.3〜0.50.150.60.15橡皮-铸铁0.80.5木材-木材0.4〜0.60.10.2〜0.50.07〜0.15常用材料摩擦系数???????????摩???擦???系???数?？摩擦副材料摩??擦??系??数p无润滑有润滑钢-钢0.15*0.1-0.12*0.1?0.05-0.1钢-软钢0.2?0.1-0.2钢-不淬火的T80.150.03钢-铸铁0.2-0.3*0.05-0.150.16-0.18钢-黄铜0.190.03?钢-青铜0.15-0.180.1-0.15*0.07钢-铝0.170.02钢-轴承合金0.20.04钢-夹布胶木0.22钢-钢纸0.22钢-冰0.027*0.014石棉基材料-铸铁或钢0.25-0.400.08-0.12皮革-铸铁或钢0.30-0.500.12-0.15摩擦副材料摩??擦??系??数p无润滑有润滑材料（硬木）-铸铁或钢0.20-0.350.12-0.16软木-铸铁或钢0.30-0.500.15-0.25钢纸-铸铁或钢？0.30-0.500.12-0.17毛毡-铸铁或钢0.220.18软钢-铸铁0.2*,0.180.05-0.15软钢-青铜0.2*,0.180.07-0.15铸铁-铸铁0.150.15-0.160.07-0.12铸铁-青铜0.28*0.16*?0.15-0.210.07-0.15铸铁-皮革0.55*,0.280.15*,0.12?铸铁-橡皮0.80.5皮革-木料0.4-0.5*0.03-0.05铜-T8钢0.150.03?铜-铜0.20黄铜-不淬火的T8钢0.190.03黄铜-淬火的T8钢0.140.02黄铜-黄铜0.170.02摩擦副材料摩??擦??系??数“无润滑有润滑黄铜-钢0.300.02黄铜-硬橡胶0.25黄铜-石板0.25黄铜-绝缘物0.27青铜-不淬火的T8钢0.16青铜-黄铜0.16青铜-青铜0.15-0.200.04-0.10青铜-钢0.16青铜-夹布胶木0.23青铜-钢纸0.24青铜-树脂0.21青铜-硬橡胶0.36青铜-石板0.33?青铜-绝缘物0.26铝-不淬火的T8钢0.180.03铝-淬火的T8钢0.17?0.02铝-黄铜0.270.02铝-青铜0.22?铝-钢0.300.02摩擦副材料摩??擦??系??数“无润滑有润滑铝-夹布胶木0.26硅铝合金-夹布胶木0.34硅铝合金-钢纸0.32硅铝合金-树脂0.28硅铝合金-硬橡胶0.25硅铝合金-石板0.26硅铝合金-绝缘物？0.26钢-粉末冶金0.35-0.55*木材-木材0.4-O.6*0.1*0.2-0.50.07-0.10?麻绳-木材0.5-0.8*?0.545号淬火钢-聚甲醛0.460.01645号淬火钢-聚碳酸脂0.300.0345号淬火钢-尼龙9（加3%MoS2填充料）0.570.0245号淬火钢-尼龙9（加30%玻璃纤维填充物）0.480.02345号淬火钢-尼龙1010?（加30%玻璃纤维填充物）0.039摩擦副材料摩??擦??系??数“无润滑有润滑45号淬火钢-尼龙10100.07(加40%玻璃纤维填充物)45号淬火钢-氯化聚醚0.350.03445号淬火钢-苯乙烯-丁二烯-丙烯腈共聚体(ABS)0.35-0.460.018注:1.表中滑动摩擦系数是试验数值，只能作为近似计算参考.???2.表中带"*"者为静摩擦系数.？常用材料的滚动摩阻系数材料名称滚动摩阻系数(mm)铸铁-铸铁0.5?钢质车轮-钢轨0.05木-钢0.3〜0.4木-木0.5〜0.8软木-软木1.5淬火钢珠-钢0.01软钢-钢0.5有滚珠轴承的料车-钢轨0.09无滚珠轴承的料车-钢0.21钢质车轮-木面1.5〜2.5轮胎-路面2-10页眉内容各?种?工?程?用?塑?料?的?摩?擦?系?数??下试样上?试?样（钢）上?试（塑料）？静摩擦动摩擦静摩擦动摩擦（塑料）系数ps系数pk系数ps系数pk聚四氟乙烯0.100.050.040.04聚全氟乙丙烯0.250.18低密度聚乙烯0.270.26?0.33?0.33高密度聚乙烯0.180.08-0.120.120.11聚甲醛0.140.13聚偏二氟乙烯0.330.25聚碳酸酯0.600.53聚苯二甲酸乙0.290.280.27*0.20*二醇酯聚酰胺（尼龙66）0.370.340.42*?0.35*聚三氟氯乙烯0.45*0.33*0.43*0.32*聚氯乙烯0.45*0.40*0.50*0.40*聚偏二氯乙烯?0.68*0.45*0.90*0.52*注:*表示粘滑运动.??页眉内容常用材料的滚动摩擦系?数摩擦副材料滚动摩擦系数k,cm淬火钢-淬火钢0.001?铸铁-铸铁0.05?木材-钢0.03-0.04木材-木材0.05-0.08铁或钢质车轮-木面0.15-0.25钢质车轮-钢轨?0.05注:表中滚动摩擦系数是试验值，只能作近似参考