材料的機(jī)械行為-全文預(yù)覽
【正文】 d twisted. Note the shear deformation of an element in the reduced section of the specimen. lr?? ? 彎曲（撓曲） Bending （ Flexure） Figure Two bendtest methods for brittle materials: (a) threepoint bending。塑膠材料對(duì)其機(jī)械性質(zhì)也有不好的影響。例如：口香糖、玻璃、熱塑性塑膠、ZnAl合金及鈦合金。CHAPTER 2 Mechanical Behavior, Testing, and Manufacturing Properties of Materials 材料的機(jī)械行為、測(cè)試及製造特性 ? Working Medium of Manufacturing Process ? Force ? Heat ? Light ? Acoustics(聲音、音響 ) ? Electricity ? Chemistry ? Biology 室溫時(shí)材料之相對(duì)機(jī)械性質(zhì) (Relative Mechanical Properties of Materials at Room Temperature) TABLE 2 . 1S tr e n g th H a r d n e ss To u g h n e ss S tiffn e ss S tr e n g th /De n sityGla ss fib e rsGra p h it e fib e rsKe v lar fib e rsCa rb id e sM o ly b d e n u mS tee lsTan talu mTi tan iu mCo p p e rRe in fo rc e dRe in fo rc e dTh e rm o p las ti c sLea dDia m o n dCu b ic b o ro n n it rid eCa rb id e sHa rd e n e d ste e lsTi tan iu mCa st i ro n sCo p p e rTh e rm o se tsM a g n e siu mth e rm o se tsth e rm o p las ti c sLea dRu b b e rsDu c ti le m e talsRe in fo rc e d p las ti c sTh e rm o p las ti c sWo o dTh e rm o se tsCe ra m icsGla ssCe ra m icsRe in fo rc e dTh e rm o p las ti c sTinTh e rm o p las ti c sDia m o n dCa rb id e sTu n g ste nS tee lCo p p e rTi tan iu mAlu m in u mTan talu mp las ti c sWo o dTh e rm o se tsRe in fo rc e d p las ti c sTi tan iu mS tee lAlu m in u mM a g n e siu mBe ry ll iu mCo p p e r TensileTest Specimen and Machine (b) Figure (a) A standard tensiletest specimen before and after pulling, showing original and final gage lengths. (b) A typical tensiletesting machine. 應(yīng)力應(yīng)變曲線（ StressStrain Curve） Figure A typical stress strain curve obtained from a tension test, showing various features. ?Pδ； ζε ?彈性區(qū)經(jīng)過(guò)放大 ?斜率 =E ?比例限、彈性限、降伏強(qiáng)度 ?Offset=% ?反覆循環(huán)負(fù)荷之曲線形狀 ?曲線下面積＝材料韌性 ?necking E 0lnll0AppEng.
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