【正文】 the fundamentals of stress and defection analysis. 4. Introduces fatiguefailure theory with the emphasis on stresslife approaches to highcycle fatigue design, which is monly used in the design of rotation machinery. 5. Discusses thoroughly the phenomena of wear mechanisms, surface contact stresses ,and surface fatigue. 6. Investigates shaft design using the fatigueanalysis techniques. 7. Discusses fluidfilm and rollingelement bearing theory and application 8. Gives a thorough introduction to the kinematics, design and stress analysis of spur gears , and a simple introduction to helical ,bevel ,and worm gearing. 9. Discusses spring design including pression ,extension and torsion springs. 10. Deals with screws and fasteners including power screw and preload fasteners. 11. Introduces the design and specification of disk and drum clutches and brakes. Machine Design The plete design of a machine is a plex process. The machine design is a creative work. Project engineer not only must have the creativity in the work, but also must in aspect and so on mechanical drawing, kinematics, engineerig material, materials mechanics and machine manufacture technology has the deep elementary knowledge. One of the first steps in the design of any product is to select the material from which each part is to be made. Numerous materials are available to today39。 新設(shè)計本身會有許多缺陷和未能預(yù)料的問題發(fā)生，只有當(dāng)這些缺陷和問題被解決之后，才能體現(xiàn)出新產(chǎn)品的優(yōu)越性。僅僅使用數(shù)據(jù)和公式是不足以在一個好的設(shè)計中做出所需的全部決定的。另一個重要問題，設(shè)計工程師必須能夠同其他有關(guān)人員進行交流和磋商。計算（圖紙尺寸）檢查是非常重要的。機械設(shè)計是一項創(chuàng)造性的工作。 5. 介紹疲勞失效理論并強調(diào)在壓力條件下接近高循環(huán)的疲勞設(shè)計，這通常用在旋轉(zhuǎn)機械的設(shè)計中。 7. 選擇組合材料。 為了激發(fā)創(chuàng)造性思維，下列是設(shè)計和分析的建議規(guī)則。在近年來的許多產(chǎn)品責(zé)任訴訟案件中，由于錯誤地使用產(chǎn)品而受到傷害的原告控告生產(chǎn)廠家，并且贏得判決）； (c)所使用的材料的數(shù)據(jù)不全或是有些數(shù)據(jù)不確定，尤其是當(dāng)其性能數(shù)據(jù) 長期不更新 ； (d)質(zhì)量控制方法不適當(dāng)和未經(jīng) 驗證； (e)由一些完全不稱職的人員選擇材料。設(shè)計的過程是重復(fù)和合作的過程，無論是正式或非正式的進行，對設(shè)計者來說每個階段都很重要。只有這樣，才不致于 阻斷 創(chuàng)新的思路。許多原則和設(shè)計方法 不但 適用于機器的設(shè)計，也適用于非機器的 設(shè)計 。術(shù)語中的“機械裝置設(shè)計” 的含義 要比“機械設(shè)計”的含義更為廣泛一些，機械裝置設(shè)計包 括 機械設(shè)計。通常 ,還 要提出幾套設(shè)計方案，然后加以 比較。 最后，以圖樣為設(shè)計的標(biāo)準(zhǔn)，并建立將來的模型。 通過對上述五個問題的分析，可以得出這些問題是沒有充分理由 而 存在的結(jié)論。前六個規(guī)則對設(shè)計者來說特別適用。 8. 仔細選擇所備的原料和不可缺少的組件。 6. 深入探討機械磨損機理、表面接觸應(yīng)力和表面疲勞現(xiàn)象。設(shè)計工程師不僅在工作上要有創(chuàng)造性，還必須在機械制圖、運動學(xué)、工程材料、材料力學(xué)和機械制造工藝學(xué)等方面具有深厚的基礎(chǔ)知識。一個小數(shù)點的位置放錯，就可以導(dǎo)致一個本可以完成的項目失敗。在開始階段，設(shè)計人員必須就初步設(shè)計同管理人員進行交流和磋商，并得到批準(zhǔn)。另一方面，應(yīng)該認真精確的進行所有運算。因此，一個性能優(yōu)越的產(chǎn)品誕生的同時，也伴隨著較高的風(fēng)險。s designers. The function of the product, its appearance, the cost of the material, and the cost of fabrication are important in making a selection. A careful evaluation of the properties of a. material must be made prior to any calculations. Careful calculations are necessary to ensure the validity of a design. In case of any part failures, it is desirable to know what was done in originally designing the defective ponents. The checking of calculations (and drawing dimensions) is of utmost importance. The misplacement of one decimal point can ruin an otherwise acceptable project. All aspects of design work should be checked and rechecked. The puter is a tool helpful to mechanical designers to lighten tedious calculations, and provide extended analysis of available data. Interacti