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ID:37615980
大小:2.45 MB
页数:41页
时间:2019-05-26
《材料力学 课件(厦门大学)第五章 弯曲内力 internal force in bending》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第五章弯曲内力Beam:structurememberswithabendingdeformationasthemajordeformationthelongitudinalaxisofbeamSymmetricaxisofthecrosssectionLongitudinalplaneofsymmetryofthebeamFig.4-3(p273)supportsofbeamsimplebeamcantileverbeampinsupportpinsupportrollersupportfixedsupportfixe
2、dsupport(clampedsupport)beamwithanoverhangpinsupportrollersupportstaticallyindeterminatebeams4.3,p276-283SignConvention:+-QQclockwiseQQdxdxlowerpartelongatedEx:4-1、4-2、4-3(p278)4.5,p288-294•EtEquatiionsdescribingvariationsofshearforcesandbendingmomentsalonglocati
3、onsofsections•DiagramsdescribingvariationsofshearforcesandbendingmomentsalonglocationsofsectionsEx:•asinglepointforce(p289)•uniformlydistributedforcesuniformlydistributedforces(p291)•multippplepointforces(pp)292)q:upperpositive4.4,p284-288balancesofelementbalance
4、sofelementpointforces:p287balancesofelementbalancesofelementconcentratedbendingmomentsconcentratedbendingmoments:p288
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