壓縮機(jī)連桿材料強(qiáng)度壽命計(jì)算的程序開發(fā)

機(jī)械設(shè)計(jì)制造及其自動(dòng)化論文，論文編號(hào):JX1098  論文字?jǐn)?shù):13353.頁數(shù):31

 摘 要
     基于材料力學(xué)、連續(xù)損傷力學(xué)、微觀斷裂力學(xué)和宏觀斷裂力學(xué)的共同之處是研究材料強(qiáng)度和壽命兩大問題之觀點(diǎn)，基于認(rèn)為裂紋尺寸a如同損傷變量D那樣也可以作為損傷變量的觀點(diǎn)，借助于簡單模型和雙向組合坐標(biāo)系，從研究構(gòu)件被加載后材料行為演化過程的機(jī)理和特點(diǎn)著手，結(jié)合材料力學(xué)、連續(xù)損傷力學(xué)、細(xì)觀斷裂力學(xué)、宏觀斷裂力學(xué)相關(guān)計(jì)算的分析，探索、尋求各學(xué)科在循環(huán)載荷下的材料行為的曲線、變量、方程、材料常數(shù)在各個(gè)階段上的相似和相異之處，探索和尋求它們之間的溝通及交叉關(guān)系，從各個(gè)階段到整個(gè)過程認(rèn)識(shí)它們之間在一定條件下的統(tǒng)一性和特殊性。論文主要是研究壓縮機(jī)連桿材料的疲勞損傷，分析連桿材料在受力狀態(tài)下的應(yīng)力-應(yīng)變關(guān)系，編制拉壓、剪切、彎扭靜強(qiáng)度和壽命計(jì)算程序，完成對(duì)構(gòu)件材料作常規(guī)靜強(qiáng)度和壽命計(jì)算的任務(wù)。開發(fā)的程序是以C++ Builder 6.0 為平臺(tái)，采用了面向?qū)ο蟮脑O(shè)計(jì)方法，具有計(jì)算功能強(qiáng)、計(jì)算方法靈活、速度快以及能完成人工無法完成的計(jì)算等特點(diǎn)，并有很好的可移植性。
關(guān)鍵詞：  壽命   剪切   彎曲    扭轉(zhuǎn)   程序     疲勞斷裂
 
 Abstract
 Based on the standpoint to be all study strength and life problem of materials on material, continuum-damage, micro-fracture and macro-fracture mechanics, Base on the standpoint to take for the crack size a also to be a damage variable like as the damage variable D, by means of a material damage simple model and the two directions combined coordinate system, studies the mechanisms and features in evolving process of material behaviors under cyclic loading. According to lots of calculation and analysis by material, continuum-damage, micro-fracture, macro-fracture mechanics, finds some alike and different rules on the variables, equations, curves and material constants in varied subjects, thereby quests their correlations each other. This design is mainly research and analysis of materials in the mechanical force under the stress - strain relations，The preparation of tension and compression, shear, bending and torsion static strength program, to complete component materials for conventional static strength calculation of the mandate。The Procedures based on C++ Builder 6.0 was developed, which can be used to analyse the strength and life of these components. This Procedures has some remarkable characters, for example, it is more  stronger and faster calculating function, and it permits operator to choose stress calculation or stress intensity factor of life calculation flexibly. Further more, it can complete the work which can’t be done by manual.
Key words：  Life;  Shear;   Bending ;  Reverse ;  Procedures ; Fatigue and Fracture.
目  錄
中文摘要 I
英文摘要 II
目錄 III
第一章  緒論 1
     1.1 課題背景   1
1.2 國內(nèi)外研究現(xiàn)狀 1
第二章  壓縮機(jī)連桿的強(qiáng)度壽命計(jì)算 5
 2.1  往復(fù)式壓縮機(jī)的簡介 5
 2.2  連桿材料在強(qiáng)度計(jì)算上的交叉與溝通 5
 2.3  損傷演變行為計(jì)算方程的研究和分析 10
 2.4  在壽命估算上交叉與溝通 14
 2.5  20號(hào)鋼連桿的壽命表達(dá)式 20
第三章  表達(dá)式的編制 21
 3.1  可視化開發(fā)工具-C++ Builder6.0介紹 21
 3.2  人機(jī)交互的界面實(shí)現(xiàn) 21
 3.3  編寫計(jì)算表達(dá)式的程序 25
 3.4  事例驗(yàn)證 25
第四章  總結(jié)與展望 26
 4.1  總結(jié)   26
 4.2  展望 26
參考文獻(xiàn) 27
致謝 28