简介：Thedynamicresponseofthenon-linearelasticsimplysupportedbeamsubjectedtoaxialforcesandtransverseperiodicloadisstudied.Melnikovmethodisusedtoconsiderthedynamicbehav-iorofthesystemwhosepost-bucklingpathissteady.Theeffectofthehigherordertermsinthecon-trollingequationistakenintoaccount.Itisfoundthatthefifth-ordertermshaveagreatinfluenceonthedynamicbehaviorofthesystem.Theresultshowsthatthereexisteitherhomoclinicorbitsorhete-roclinicorbitsinthesystem.Inthispaper,thecriticalvaluesofthesystementeringchaoticstatesaregiven.Thediagramofanexampleisshown.

简介：

简介：Thedynamicbehavioroftwoparallelsymmetriccracksinapiezoelectricstripunderharmonicanti-planeshearwavesisstudiedusingtheSchmidtmethodforpermeablecracksufaceconditions.Thecracksareparalleltotheedgeofthestrip.BymeansoftheFouriertransform,theproblemcanbesolvedwiththehelpoftwopairsofdualintegralequations.Theseequationsaresolvedusingtheschmidtmethod.Theresultsshowthatthestressandtheelectricdisplacementintensityfactorsdependonthegeometryofthecracks,thefrequencyofincidentwaves,thedistancebetweencracksandthethicknessofthestrip.Itisalsofoundthattheelectricdisplacementintensityfactorsforthepermeablecracksurfaceconditionsaremuchsmallerthanthosefortheimpermeablecracksurfaceconditions.

简介：为angle-interlockwoven的有弹性的行为分析的一个微机械模型陶器的composites在这篇论文被建议。这个模型由在空间，在邻近的纱之间的洞和纱的实际剖面图几何学认为纤维是波动和连续性考虑实际织物结构。基于laminate理论，编织的3D角度联锁的有弹性的性质陶器的composites被预言。交叉的纬的不同数字几乎有一样的有弹性的moduli。陶器的矩阵的厚度在有弹性的moduli上有小效果。当波动比率增加纵的模量减少和另外的幼仔的moduli增加时。在理论预言和试验性的结果之间的好同意在分析编织的3Dangle-interlock的有弹性的性质表明建议模型的可行性陶器的composites。这篇论文的结果验证分析聚酯矩阵composites的方法对编织陶器的composites合适的事实。

简介：Equilibriumpathsofpost-bucklingaremeasuredforlargeslendernesscolumnspecimensmadeofthefiberreinforcedcompositematerial.Theinfluenceoftheinitialcurvatureisinvestigatedexperimentallyandcomparedwiththeresultoftheinitialpost-bucklingtheory.Boththetheoreticalandexperimentalresultsrevealthatthecolumnwiththeinitialcurvaturehasstablepost-bucklingbe-haviorsandisnotsensitivetotheimperfectionintheformofinitialcurvature.Theexperimentalre-sultsshowthatwhenthelateralbucklingdisplacementislessthan20percentofthecolumnlength,theexperimentalresultsagreewiththeresultsfromthetheoryofinitialpost-bucklingquitewell,whiletheyagreewiththeresultsfromthelargedeflectiontheoryinaquitelargerange.

简介：Inthispaper,thebehavioroftwocollinearcracksinmagneto-electro-elasticcompositematerialunderanti-planeshearstressloadingisstudiedbytheSchmidtmethodforpermeableelectricboundaryconditions.ByusingtheFouriertransform,theproblemcanbesolvedwithasetoftripleintegralequationsinwhichtheunknownvariableisthejumpofdisplacementsacrossthecracksurfaces.Insolvingthetripleintegralequations,theunknownvariableisexpandedinaseriesofJacobipolynomials.Numericalsolutionsareobtained.Itisshownthatthestressfieldisindependentoftheelectricfieldandthemagneticflux.

简介：以便学习在一个外部地侧面的强壮的冲动的磁场的条件下面联合支持thesimply的传导性的矩形的薄板的机械行为的多地，那是在在旋涡水流和磁场之间的相互作用生产的磁性的体积力量的效果的薄盘子的动态弄弯现象，一个女性的分析节目被开发描绘磁电的弄弯和盘子的不稳定性的现象。为三个不同起始的颤动模式的磁场的批评价值被获得，与在应用磁场的批评的值B_(0cr)上在板和长度宽度比率a/b以及推动参数τ的长度厚度比率a/h的效果上做的详细讨论。