2013224JOURNALOFARCHITECTURALEDUCATIONININSTITUTIONSOFHIGHERLEARNINGVol.22No.42013doi10.11835/j.issn.1005-2909.2013.04.0122012-12-151975-E-maildashingdell@163.com。蔡路军,磨季云,韩芳430065目前材料力学教材中对逐段刚化法讲解不够详细,并且仅应用于求解梁的变形,但逐段刚化法其实质是叠加法的一种,为材料力学的一种基本方法,可应用于多种问题的求解,尤其是较为复杂的材料力学问题。文章在分析逐段刚化法原理的基础上,结合教学体会,对其在超静定拉压杆、阶梯轴、变截面梁和平面刚架问题的应用作了阐述。材料力学;课程教学;逐段刚化法;叠加法;变形G642.0A1005-2909201304-0044-04。———。、m-mI、II1δsum=δI+δIIδ。1I、II1b、1c。1d。。“”1a。。。4123、4“”。、。(一)逐段刚化法在轴向拉压中的应用2AB1/3PA、BEA。21。ABACCB2b。ACCBRBCBCBACRA。。2ACBCΔlBC=-RB·23lEACBACΔlAC=RA·13lEAΔlAB=ΔlAC+ΔlBC=RA·13lEA+-RB·23lEA=0RA=2RB。RA+RB=PRA=2P3RB=P3。(二)逐段刚化法在圆轴扭转中的应用2aA。M1=1500NmM2=1000Nmd1=70mmd2=50mmG=80.4GPa。。1ACABBC3b。ABCBM2BCABMAB、BC。32ABBCBC=T2l2GIP2=1000×600×10-380.4×109×3.1432×504×10-12=0.0122radBCABAB=T1l1GIP1=5420132242500×500×10-380.4×109×3.1432×704×10-12=0.0066rad。ACφmax=φAC=φAB+φBC=0.0188rad。(三)逐段刚化法在梁变形中的应用4aEI1、EI2。41B。ACCB4b、c。ACCBCCBCBAC“”CFMCBCBCCB。24bf1=-Fl323EI2。4cf2C=-Fl313EI1-Fl2l212EI1f2CB=θ2·l2=-Fl212EI1-Fl2l1EI()1·l2。4aBfB=f1+f2=f1+f2C+f2CB=-F3El32I2+l31I()1-Fl1l2EI1l1+l()2。(四)逐段刚化法在刚架中的应用5a。EIA。1CBBA5b、c。CBBABBABABA“”CBBFMCB。A。52CBBA5dBA。BACBFM5dCB。A64A5e。EIΔA=12Fl·l·23l+Fl·h·l=13Fl3+Fl2hΔA=Fl2l+3h3EI。、。、、。[1]刘鸿文.材料力学[M].5版.北京:高等教育出版社,2010.[2]陈兰新.逐段刚化法在材料力学中的应用[J].甘肃广播电视大学学报,1998(3):62-64.[3]洪彩霞.逐步刚化法的实质[J].电力学刊,1991,6(2):41-43.ApplicationofpiecewiserigidizationmethodinmechanicsofmaterialsCAILujunMOJiyunHANFangScienceCollegeWuhanUniversityofScienceandTechnologyWuhan430065P.R.ChinaAbstract:Atpresent,thepiecewiserigidizationmethodinmechanicsofmaterialsisnotexplainedindetail,whichisonlyappliestosolvethedeformationofbeam.Infact,itisakindofsuperpositionmethod.Asabasicmethodinmechanicsofmaterials,itcanbeappliedtosolveavarietyofproblems,especiallycomplexmechanicsproblems.Basedontheanalysisofprincipleofthepiecewiserigidizationmethod,combiningwithmyownteachingexperience,theapplicationisdiscussedindepthonthestaticallyindeterminatetensionandcompressionbar,steppedshaft,non-uniformbeamandplanerigidframe.Keywords:mechanicsofmaterials;courseteaching;piecewiserigidizationmethod;superpositionmethod;deformation74