plastic distortion meaning in English
塑性变形
Examples
- By using finite element simulation method and plastic distortion theory , the author analyzes the principle of the stretch bending forming and builds finite element model of rotary stretch bending
本文采用有限元模拟的方法，结合金属成形的塑性变形理论，深入分析了拉弯的成形机理，建立了用于转台式拉弯成形模拟的有限元模型。 - The research work of the thesis include mainly : ( 1 ) observe a phenomenon which the two fracture modes are simultaneously found near crack tip of a four - point - bend specimen when the ratio of m / q is close to 3 . 0mm , criteria m / q , when the fracture mode of four - point - bend specimen transits from void - mode to shear - mode . intensely location plastic distortion is observed in the front of crack tip and the macro - fracture of the specimen with the same m / q belongs to shear - mode fracture
本文主要在以下几个方面取得了一定的进展：通过四点弯试件的断口和切片试验，观察到裂纹尖端同时存在两种断裂机制? ?在两种断裂模式相互转化的临界状态附近，裂纹前方既有钝化和延伸区中的空穴形核扩张，又有锐化角前剧烈的集中剪切变形。 - It is one of mechanisms of plastic distortion , at the same time it is also the beginning of microcosmic damage and rupture before the macroscopical destroying of materials , it representatives a mid - state between materials " macroscopical rupture and bend , it is considered a premonitory that the rupture of polymer material , which get common attention by scholar inside and outside nation . therefore , the research for engineering polymer in mechanic action of non - linearity destroy such as distortion , destroy and depe nd on time and temperature is valuable in theoretic research and actual application , which offer the important theoretic gist for changing complex material ' s capability and actualize polymer ' s perfect application with high quality of capability in engineering
同时，银纹化和银纹损伤是高聚物特有的一种现象，细观层次的银纹引发、生长和断裂在聚合物损伤断裂的整个过程中起着承前启后的作用，它是沟通宏、微观变形机制的桥梁，是材料塑性变形的机制之一，同时又是材料宏观破坏以前微观上损伤、破坏的开始，它代表材料微观断裂和屈服之间的一个中间状态，可以看作是聚合物材料宏观断裂的先兆，受到国内外学者们的广泛关注。因此，开展工程聚合物变形、破坏以及时间相依和温度依赖性等非线性力学行为研究，探讨聚合物破坏过程中的非线性力学行为，为聚合物及其复合材料的改性、实现聚合物的工程化与高性能化提供重要的理论依据，具有重要的理论研究意义和实际应用价值。 - The paper validates and perfects the traditional wear theory by using the ferrography , at the same time , combining the practice , mechanical embedded minor particles , scoring , plastic distortion , shaping effect and fatigue effect are analyzed and the results show that the vehicle ' s malfunction can be predicted
文章作者将铁谱磨粒分析技术运用在汽车维修行业，验证和完善了传统磨损理论，并结合实践，对微凸体机械嵌合、胶合，塑料变形及刨削作用和疲劳作用进行了分析，证明汽车机械故障可以预测，且可以防止重大事故的发生。 - Author thinks that the direction of the maximum plastic distortion along a constant radius around the crack tip may be considered as the direction of shear - mode fracture ( named pmax - criterion ) and the load when located shear band prongs the ligament in the front of crack tip is regarded as the limited load of shear - mode fracture . ( 3 ) the fad ( fracture assessment diagram ) of titled crack is proposed based on achievements of mesomechanics about i - ii complex ductile fracture of metal , and the titled crack is classified two kinds : void - mode fracture is assessed by fracture assessment curve , and shear - mode fracture by limited load . ( 4 ) using a fe program based on plantle - ressue theory to calculate some mesomechanical parameters , a flange joint structure of a high pressure vessel ( design pressure 31 . 4mpa and the thickness of the hemispherical head is half of that of shell . ) is analyzed to determine whether the structure under operation pressure is safe or not , forecast the mode of potential invalidation and argue for the rationality of design of the structure
试件的整体断裂为剪切型，但在试件芯部裂尖钝化区中部出现了韧窝型启裂并有一定的扩展，说明局部较高的应力三轴度也会使韧窝型机制得以发展，但是不改变试件整体的剪切型断裂模式；对韧性断裂的剪切模式的细观机理做了一定的探讨，并且提出了含裂纹构件剪切型断裂的宏观判据：认为裂纹前方的集中剪切带中与裂纹尖端等半径处最大有效塑性应变出现的方向可以作为裂纹剪切断裂的方向(可简称为_ ( pmax )准则) ，集中剪切滑移带贯穿裂纹前方承载韧带时的载荷可以作为极限载荷；本文运用金属韧性断裂细观力学在一复合型韧性断裂方面的研究成果，采用失效评定图的形式，提出了倾斜裂纹的安全性评定方法的基本框架。