Through static analysis in the seven working conditions, Stress and strain of each working condition of location are obtained. Then the approximate simulating load spectrum and response spectrum of fatigue risk points are established. 通过对挖掘机各部件在这7个工况下的有限元分析,求得各个部件的应力应变,建立疲劳危险点的近似应力应变时间历程。
The paper analyses the reason that causes early fatigue fracture. From the points of design and technology, the paper put forward three factors, that is choosing design parameter reasonably, changing original organizing structure; selecting critical zone quenching. 分析了引起前轮主销早期疲劳断裂的原因,从设计和工艺两方面提出了合理选择设计参数、改善原始组织形态、采用临界区淬火是确保前轮主销可靠性的三个重要因素。
This article introduces the design configuration, technical parameter, and main technical requirements and standards of fatigue vessel, especially the difficult points during fabrication and the resolve scheme 、 and introduces the technology project and machining produce for whole equipment as well. 疲劳容器的设计结构,技术参数,主要技术条件和标准,着重介绍了生产制造难点和解决方案,介绍了总装工艺和整体加工过程。
For calculation of residual life and reliability in corrosion fatigue, the multinomial of seven points increased by degree was used in order to regress the coefficient C and m under the experimental condition. 针对腐蚀疲劳剩余寿命及其可靠度的计算问题,采用七点递增多项式的方法回归出试验条件下的系数C、m。
According to the standard, the specimen with prefabricated fatigue crack has a standard 3 points bending shape that has a rectangular section of B × 2B ( B : specimen thickness ) and notch orientation of thickness direction. 取尺寸为B(板厚)×2B、缺口方向为板厚方向、带预制疲劳裂纹的标准试样进行三点弯曲试验。