实验应力础 微機液壓萬能試驗機
2. Other methods Since the early 20th century, the developments of electricity, optics acousics and materials science have provided conditions for the productionof other measurement methods of the stress analysis in experiments. Then the resistance strain method, ordinary photoelasticity method, hologram photoelasticity method sound launching method and so on are made fast developments and wide applications
2. Other methods： Since the early 20th century,the developments of electricity,optics acousics and materials science have provided conditions for the productionof other measurement methods of the stress analysis in experiments.Then the resistancestrain method,ordinary photoelasticity method,hologram photoelasticity method,sound launching method and so on are made fast developments and wide applications
2.其它方法: 20世纪初至今,电学、光学、声学和材料科学的发展, 为试验应力分析其它测量方法的产生创造了条件。于是,电 阻应变法、普通光弹法、全息光弹法、散斑法、声发射法等 方法都有了快速发展和广泛应用
2.其它方法： 20世纪初至今，电学、光学、声学和材料科学的发展， 为试验应力分析其它测量方法的产生创造了条件。于是，电 阻应变法、普通光弹法、全息光弹法、散斑法、声发射法等 方法都有了快速发展和广泛应用
8 15-2 Principle and application of the strainometer of the resistance L 1 Resistance law: Resisance of a conductor R 2、 Elastic law A Land a will change after the inductor is subjected to forces or changes in temperatures a△T 3 Strain foil of resistance △R△L K=KE r Wire-coiled strain foil K-- Sensitive coefficient1-Overburden Fundus 3-Drawn line 4--Binder 5-Sensitive bar
§15–2 Principle and application of the strainometer of the resistance 1、Resistance law :Resisance of a conductor A L R= 2、Elastic law: Land A will change after the cinductor is subjected to forces or changes in temperatures. T E = + 3、Strain foil of resistance K L L K R R = = Ｋ— Sensitive coefficient 1 2 3 4 5 Wire-coiled strain foil 1—Overburden 2—Fundus 3—Drawn line 4—Binder 5—Sensitive bar
§ 15-2电阻应变计法的原理及应用 电阻定律:导体电阻R=p 二、弹性定律:导体受力或变温后,L、A都将发生改变。 +CAT E 三、电阻应变片: △R△L K=KE r 4 丝绕式应变片 K一灵敏系数: 1—覆盖层2—基底3—引出线 4—粘结剂5—敏感栅
§15–2 电阻应变计法的原理及应用 一、电阻定律：导体电阻 A L R= 二、弹性定律：导体受力或变温后，L、A都将发生改变。 T E = + 三、电阻应变片： K L L K R R = = Ｋ— 灵敏系数： 1 2 3 4 5 丝绕式应变片 1—覆盖层 2—基底 3—引出线 4—粘结剂 5—敏感栅