| 1. | Magnetic testing method of residual stress distribution by geomagnetic excitation
地磁场激励下残余应力分布的磁检测方法 |
| 2. | The residual stresses in the thick aluminum alloy plates of ly12 , b95 . and 7050t7451 are measured , and the results are analyzed and compared
在此基础上,首次对国产ly12 、美产7050t7451和俄产b95 .三种典型的铝合金预拉伸板内部初始残余应力分布进行了测试和对比分析。 |
| 3. | With the application of combined hardenning model , a program of elastic - plastic finite element analysis is edited , and applied to the analysis of cold - expanded hole problem
提出了一种基于试验的组合强化模型，编制了应用试验组合强化模型的弹塑性有限元程序，并对冷胀孔边的残余应力分布进行了计算。 |
| 4. | Through leading the files into the stability analysis of ansys , ultimate load in the effect of residual stress can be gained . the method can be applicable to simulate difficult distribution of the residual stress
该方法通过指定单元沿厚度方向5个积分点处的应力值，来反映冷弯残余应力沿厚度方向变化的特点，并适用于模拟各种残余应力分布。 |
| 5. | 2 . the residual stresses in pre - stretched aluminum alloy plates are successfully measured and analyzed . the measurement precision and applicability of the modified layer removal method are analyzed and evaluated by experiments
2 、铝合金预拉伸板内部残余应力分布规律的研究通过试验研究对改进剥层法测试理论的测试精度及工程实用性进行了分析和评估。 |
| 6. | Finally , this paper calculates the residual stresses distribution of multilayered graded coating structures with the theoretical model built in the paper and the elastic model , and it discusses the influences of material ' s plasticity to the thermal stresses of the graded coating
最后，本文分别用在文中建立的理论模型和完全弹性模型对多层梯度涂层结构的残余应力分布进行了计算，讨论了材料的塑性行为对梯度涂层热应力的影响。 |
| 7. | In the paper , the results of experience and rules of distribution of the cold - formed residual stress are analyzed , the models of the cold - formed residual stress that are close to the fact are founded , initial stress files of ansys which can describe the magnitude and distribution of the residual stress are established
本文对冷弯残余应力的实测结果和分布规律进行了分析讨论，建立了接近实际情况的槽钢和卷边角钢的冷弯残余应力模型，创建了能描述残余应力分布和大小的ansys初应力文件，并在ansys稳定分析中引入该文件，得到构件在残余应力影响下的极限荷载。 |
| 8. | Finally , the technic route for the research of milling distortion is proposed . in chapter 4 , the effect of tool path and clamping schemes on residual stresses as well as machining distortion are analyzed by using three - dimensional elastic - plastic fem ( finite element method ) . the distortion variation tendency under four typical tool paths , the pressing - plate clamping and stretched fixation is obtained respectively
第四章基于上述理论基础,利用三维弹塑性有限元技术分析了走刀路径和装夹方案对铣削加工残余应力分布和变形的影响,得到了四种典型的走刀路径以及压板式装夹和拉伸装夹对加工变形的影响趋势。 |
| 9. | The study work in the dissertation is an important part of the tenth five - year defence advanced research project of “ study on control technology of the machining distortion for complex structure parts ” supported by pla general armament department of china . theoretical analysis and experimental study are carried out on the initial residual stresses and their effects on milling distortion for thick aero - aluminum - alloy plate
本文作为总装备部“十五”预研项目“复杂结构件加工变形控制技术研究”的主要组成部分,以航空铝合金厚板为对象,研究重点定位在其初始残余应力分布规律及其对数控铣削加工变形的影响。 |
