ttPlastics

MechanicalPerformanceTest主講人：楊崇嶺WordsandExpressionsrefersto 指的是subjectedto 受withstand [w?θ?st?nd,w?e-]vt.經(jīng)受，承受elongate [??l?:?ge?t]vt.延長，加長opposedto 反對stretched 拉伸independently [??nd??p?nd?ntl?]

adv.獨(dú)立地，自立地bendingstrength 抗彎曲強(qiáng)度modulus 模量rupture [?r?pt??]n.斷裂，破裂;vt.&vi.使破裂circular 圓形的WordsandExpressionswhereas [?wer??z]conj.然而;鑒于;反之

ultimate

極限的elongate [??l?:?ge?t]vt.延長，加長cross-section 橫截面fracture

[?fr?kt??]vt.&vi.（使）折斷，破碎toughness 韌性pendulum 鐘擺Universaltestingmachine萬能試驗(yàn)機(jī)Izodimpacttestingmachine懸臂梁沖擊試驗(yàn)機(jī)1Briefintroduction

Themechanicalpropertiesofthematerialreferstothematerialindifferentenvironment(temperature,humidity,medium),itissubjectedtovariousloadingmechanicalcharacteristicsshown.Forexample,tensile,compression,bending,torsion,shock,alternatingstressandsoon.2Ultimatetensilestrength Ultimatetensilestrength(UTS),oftenshortenedtotensilestrength(TS)orultimatestrength,isthecapacityofamaterialorstructuretowithstandloadstendingtoelongate,asopposedtocompressivestrength,whichwithstandsloadstendingtoreducesize.Inotherwords,tensilestrengthresiststension,whereascompressivestrengthresistscompression.2Ultimatetensilestrength

Ultimatetensilestrengthismeasuredbythemaximumstressthatamaterialcanwithstandwhilebeingstretchedorpulledbeforebreaking.Inthestudyofstrengthofmaterials,tensilestrength,compressivestrength,andshearstrengthcanbeanalyzedindependently.3Bendingstrength

Bendingstrength,alsoknownasmodulusofrupture,ortransverserupturestrengthisamaterialproperty,definedasthestressinamaterialjustbeforeityieldsinaflexuretest.Thetransversebendingtestismostfrequentlyemployed,inwhichaspecimenhavingeitheracircularorrectangularcross-sectionisbentuntilfractureoryieldingusingathreepointbendingtesttechnique.Thebendingstrengthrepresentsthehigheststressexperiencedwithinthematerialatitsmomentofyield.4Toughness

Thetoughnessofamaterialcanbemeasuredusingasmallspecimenofthatmaterial.Atypicaltestingmachineusesapendulumtostrikethespecimenanddeformit.Theheightfromwhichthependulumfell,minustheheighttowhichitroseafterdeformingthespecimen,multipliedbythewei