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在车辆零部件(包括转向架铸件)的设计或计算中,都需要遵照标准进行强度应力计算。应该从屈服极限、强度、杨氏弹性模量E的最小值出发来评估货车零件的强度。研究人员从货车转向架运用中损坏的侧架上切取了试样,并进行了试验,按试验结果所得到的弹性模量值E的分布表明,对铸件来说,杨氏弹性模量E的基本数值在190~290 GPa的范围内变化。而E的众数值(出现频率最高的数值)为260 GPa左右,即要比计算时所采用的数值高出40%。本文将研究在设计和试验时与确定货车铸件中的应力值有关的问题。
In the design or calculation of vehicle components (including bogie castings), strength stress calculations need to be carried out in accordance with the standards. The strength of truck parts should be evaluated from the minimum yield point, strength, and Young’s modulus E. The researchers cut the specimen from the damaged side frame of the truck bogie and cut it off. The distribution of the elastic modulus value E according to the test results shows that for the castings, Young’s modulus of elasticity E The basic values ranged from 190 GPa to 290 GPa. The E value (the highest frequency of occurrence) is around 260 GPa, which is 40% above the value used in the calculation. This article examines issues related to the determination of stress levels in truck castings during design and testing.