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- ductile fracture model 韧性断裂形态
- Whereas the alloy with low Na content exhibited ductile fracture with dimples. 而钠含量较高的合金发生韧性断裂;断口为韧窝型.
- The fracture appearance showed that ductile fracture happened during tests at elevated temperature. 断口形貌显示,叠轧材料的高温断裂属于韧性断裂。
- GB2038- 91, Metallic materials - standard test method for JIC, a measure of ductile fracture toughness[ S]. [8]GB 2038-91;金属材料延性断裂韧度JIC试验方法[S].
- Recently, evidence of ductile fracture ahead of the tool edge in cutting OFHC copper has been shown by the authors. 最近,证据韧性断裂未来的工具边缘切割高导铜在已经证明的作者。
- The problem of ductile fracture of metals under complex stress has been investigated extensively, but has not been resolved as yet. 金属材料在复杂应力状态下的韧性断裂是断裂力学研究的重要问题之一。
- To predict the forming limit in sheet metal forming, a ductile fracture criterion is introduced into the finite element simulation. 摘要为了准确地预测板料成形极限,将韧性断裂准则引入到有限元模拟中。
- Ductile fracture is produced during the process of the tensileness, whose fracture is the shape of dimple from the analysis of examination. 2 16 9钢为延性金属 ,在拉伸状态下表现出延性断裂 ,从试验分析看 ,断口主要为韧窝形式。
- Results All the vertebras had reduced bone mineral density and strength and developed a compressed fracture model. 结果所有样本的椎体骨密度和骨强度均下降,并顺利做出压缩性骨折模型。
- Mechanism of ductile fracture at corner of workpiece during grooveless rolling for high-speed wire is analysed in this paper. 分析了高速线材无槽轧制过程中轧件角部产生韧性断裂的机理,采用数值模拟方法研究了轧件角部出现裂纹的趋势。
- It remains an open question as to whether such ductile fracture occurs at higher cutting speeds and if it is a feature unique to OFHC copper. 它仍是一个开放的问题是,是否这种韧性断裂发生在更高的切割速度,如果它是一种功能独特的高导铜。
- The result indicates the material not only meets need of connecting rod but also has low ductile fracture and good fracture joggle in definite condition. 结果表明,该材料不仅能够满足连杆的使用要求,在一定条件下还具有断裂低塑性及良好的断裂啮合定位性。
- Methods One hundred and thirty 8-month-old femal SD rats were randomized into two groups of 65 each:the osteoporotic fracture model (OPFM) and the general fracture group (CFM). 方法选择8月龄雌性SPF级SD大鼠130只,随机分为2组:骨质疏松性骨折组(OPFM)与一般性骨折组(CFM),每组各65只。
- The mechanics condition of ductile fracture of pressure vessel materials and their relations to the fracture criteria were investigated based on the micromechanics. 应用细观力学的观点分析了压力容器材料韧性断裂的力学条件,并考察了其与断裂参量的关系。
- By simulating of the process of uniaxial tensile tests on a certain cohesive soil, the applicability of the brittle fracture model and the corresponding ca. 通过对某压实黏土单轴拉伸试验成果的模拟计算,验证了构建的脆性断裂模型和有限元算法对土体拉伸破坏特性和裂缝发展过程的适用性。
- With the profound research in meso-damage of ductile material,meso-damage mechanics will play more and more important role in forecasting ductile fracture of metal material. 随着韧性材料内细观损伤发展机制的深入研究,细观损伤力学在预测金属材料发生韧性断裂的过程中发挥着越来越重要的作用。
- Objective To investigate the effect of the number of screws on the bending stiffness and dynamic compression plate(DCP)strain in an in vitro transverse fracture model. 结论已定钢板长度及工作长度,螺钉数目对钢板中央应变及抗弯刚度无明显影响,但钢板总应变随螺钉数目的减少而增加。
- FANG Gang,LEI Liping,ZENG Pan.Criteria of metal ductile fracture and numerical simulation for metal forging[J].Chin J Mech Eng,2002,38(supp):21-25.(in Chinese). [3]方刚;雷丽萍;曾攀.;金属塑性成形过程延性断裂的准则及其数值模拟[J]
- The stress triaxiality was a major mechanical factor which induced brittle fracture,and the strain concentration controlled the ductile fracture procedure. 应力三轴性是控制高强匹配和低强匹配接头脆性断裂的主要力学因素,而应变集中控制着中强匹配接头的延性蠕变断裂。
- The rabbits of fracture with external fixation group were used to establish the fracture model on the left first metatarsal bone,and then left lower extremity was fixed with plaster cast. 骨折固定组制作左第一跖骨骨折模型,然后用管型石膏将左下肢固定;