简介：当他们被使遭到影响时，在自然鱼眼石晶体的破裂坚韧上结果被介绍。裂缝和骨折的形态学被学习了。裂缝形成不显示出任何各向异性的性质并且仍然是可以是水晶的取向的一样，这被发现。破裂坚韧K//c和易碎物的平均价值索引，从裂缝长度的大小决定了被估计是0.107g亩m**减**3**/**2和4.19亩m**减**1**/**2分别地为一(100)飞机。收益力量为一(100)，P(111)和C(001)为更低的负担的鱼眼石晶体的飞机是2250，2160和1840MPa并且分别地为更高的负担是1510，1600和1430MPa。(编辑作者摘要)7个裁判员。

简介：Inthispapertheresultsofahigh-speedtensionexperimentoftheSiC_w/Alcompositehavebeenreportedandasimplifiedtheoreticalmodelhasbeendevelopedtostudythefracturemechanismofcompositesinhigh-speedtension.Thistheoreticalmodelprovidesanewexplanationfortheincreaseofdynamicfracturestrengthofcompositesinhigh-speedtension.

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简介：ThefracturetoughnessandfractureworkofAl2O3/SiCprismaticceramiccompositeswasevaluatedinthispaper,whichshowedthefractureenergywasimprovedgreatly.Basedontheobservationforcrackpropagationandfracturemorphology,thefracturebehavioroftheprismaticcompositeswasanalyzed.Inthebendingtest,thecompositesdisplayedanon-catastrophicbehaviorandagracefulfailurewithreasonableload-carryingcapability.

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简介：TherelationshipbetweenCharpyabsorbedenergyandthefracturetoughnessbymeansofthe(cracktipopeningdisplacement(CTOD))methodwasanalyzedbasedontheWeibullstresscriterion.TheCharpyabsorbedenergyandthefracturetoughnessweremeasuredfortheSN490Bsteelundertheductile-brittletransitiontemperatureregion.FortheinstrumentedCharpyimpacttest,thecurvesbetweentheloadingpointdisplacementandtheloadagainsttimewererecorded.ThecriticalWeibullstresswastakenasafracturecontrolledparameter,anditcouldnotbeaffectedbythespecimenconfigurationandtheloadingpatternbasedonthelocalapproach.TheparameterscontrolledbrittlefractureareobtainedfromtheCharpyabsorbedenergyresults,thenthefracturetoughnessforthecompacttension(CT)specimenispredicted.Itisfoundthattheresultspredictedareingoodagreementwiththeexperimental.ThefracturetoughnesscouldbeevaluatedbytheCharpyabsorbedenergy,becausethelocalapproachgivesagooddescriptionforthebrittlefractureeventhoughtheCharpyimpactspecimenortheCTspecimenisusedforthegivenmaterial.

简介：Theresultsofatheoreticalstudyontheinfluenceofstrengthofinterphaseboundariesinmetal—ceramiccompositeonmacroscopicalcharacteristicsofcompositeresponsesuchasstrength,deformationcapacity,fractureenergyandfracturepatternarepresented.Thestudywasconductedbymeansofcomputer-aidedsimulationbymeansofmovablecellularautomatonmethodtakingaccountofadeveloped'mesoscopical'structuralmodelofparticle-reinforcedcomposite.Thestrengthofinterphaseboundariesisfoundtobeakeystructuralfactordeterminingnotonlythestrengthpropertiesofmetal—ceramiccomposite,butalsothepatternandrateoffracture.Theprinciplesforachievementofthehigh-strengthvaluesofparticle/binderinterfacesinthemetal—ceramiccompositionduetotheformationofthewidetransitionzones(areasofvariablechemicalcomposition)attheinterphaseboundariesarediscussed.Simulationresultsconfirmthatsuchtransitionzonesprovideachangeinfracturemechanismandmaketheachievementofahigh-strengthandahighdeformationcapacityofmetal—ceramiccompositepossible.

简介：ThedistributedopticalfibersensingtechnologywasusedtoinvestigatethefracturebehavioroftheEpoxyAsphaltMixture.Thespatialdistributionandvariationofthestraindevelopmentwithcrackpropagationwereacquiredusingthebrillouinopticaltime-domainreflectometerthroughtheloadingexperimentsofthecompositebeamstructure.Inaddition,afiniteelementmodelofthecompositebeamstructurewasdevelopedtoanalyzethemechanicalresponsesoftheepoxyasphaltmixtureusingtheextendedfiniteelementmethod.Theexperimentalresultsshowthatthedevelopmentofcrackpropagationbecomesinstablewiththeincreaseoftheload,andlargerloadswillgeneratedeepercracks.Moreover,thenumericalresultsshowthatthemechanicalresponseofthecracktipchangeswiththecrackpropagation,andtheworstareasthatsubjectedtocrackdamagearelocatedonbothsidesofthecompositebeamstructure.

简介：在变硬降水的Fe–Ni的变丑和破裂的导致氢的修正基于奥氏体的合金借助于控告实验，张力的测试，扫描电子显微镜学(SEM)和传播电子显微镜学(TEM)的热氢在现在的学习被调查了。它被发现′粒子受到在塑料变丑期间的由脱臼的多重砍，它支持脱臼的出现平面滑倒。而且，合金将被在macroscale导致紧张本地化的形成的氢提高。那么，在合金的变丑和骨折的机制被建议了以严肃导致氢平面在能导致宏观的紧张本地化的microscale滑倒。

简介：骨头接枝可以被需要用metaphyseal在老病人填满骨头缺点弄碎的远侧的半径骨折。在这回顾，nonrandomized，单个外科医生的学习，我们评估了与使矿物化的骨胶原(MC)使用两块背面的锁住板与或没有扩大的临床、放射线学的结果为老病人与的骨头接枝背面地，metaphyseal弄碎半径破裂。在组1的病人(n=12)在组2用MC骨头接枝申请与背面的锁住的盘子被对待进metaphyseal骨头缺点，和那些(n=12)仅仅与背面的锁住的盘子。临床、放射线学的参数在外科以后在三和12个月被决定。在最后的后续，没有重要差别在2个组之间被注意以手掌倾斜并且光线的倾斜(p=0.80)；然而，尺骨的变化在没有扩大，2与背面的锁住的盘子对待的组显著地增加了(p<0.05)。机能上地，这些组之间没有重要差别。我们的初步的学习建议骨头接枝代用品和背面的锁住盘子可以是的MC的那联合一为有metaphyseal的老病人有用地其他弄碎的远侧的半径骨折。

简介：这研究调查低温实验法的张力的性质和小说的破裂行为搅动焊接并且32Mn-7Cr-1Mo-0.3N钢的焊接以后的对待热的关节。低温实验法的易碎的骨折，发生在同样焊接的关节，与在联合乐队结构包含钨的剩余粒子有关。韧化的焊接以后的水导致了关节的低温实验法的intergranular易碎物，它在韧化的焊接以后的水期间与溶质原子的非平衡分离有关。在550点退火吗？？