2305 Characteristics of Stress Frequency in Welds of Vehicle Truck Frames by Service Load and Effect of Vehicle Running Conditions on Stress Frequency

Oda, Yasutomo; Yagi, Tsuyoshi; Okino, Tomohiro

doi:10.1299/jsmetld.2005.14.351

Cited by 3 publications

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“…3. In the figure, the ratio ofσ i /σ max : stressσ i to the maximum stressσ max is plotted on the vertical axis, and ratio n i /Σn i : frequency n i to total numberΣn i (11) is plotted on the horizontal axis.…”

Section: Characteristics Of Stress Frequency Distributionmentioning

confidence: 99%

Fatigue Life Estimation of Welds on Truck Frames for Rolling Stock Based on Stress Frequency Caused by Service Loads

Oda

Yagi

Okino

et al. 2009

JEE

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The fatigue strength of weld surfaces on truck frames has been estimated according to the fatigue limit diagram in JIS E 4207, General Rules for Design of Truck Frames for Railway Rolling Stock. However, it is not possible to predict actual fatigue life using this diagram. This study demonstrates the possibility of fatigue life estimation for welds on truck frames based on a modified Miner's rule. In order to estimate fatigue life, three factors are needed: the S-N diagram assumed from the allowable stress in JIS E 4207 or the JSSC fatigue design curve, the relationship between crack occurrence and running distance, and the stress frequency distribution caused by service loads.

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Section: Characteristics Of Stress Frequency Distributionmentioning

confidence: 99%

Fatigue Life Estimation of Welds on Truck Frames for Rolling Stock Based on Stress Frequency Caused by Service Loads

Oda

Yagi

Okino

et al. 2009

JEE

Self Cite

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“…The equivalent stress per 10 km (1) (3) is a single amplitude that causes fatigue damage equivalent to that produced by the accumulated frequency of variable amplitude in a particular 10-km section. It is considered possible to estimate stress frequency distribution according to running condition changes by comparing equivalent stresses per 10 km for each different condition calculated from stress frequency distributions indicated by past running test data (4) .…”

Section: Introductionmentioning

confidence: 99%

Effects of Vehicle Running Conditions on Stress Frequency Distribution of Welds on Truck Frames for Railway Rolling Stock

Oda

Yagi

Okino

et al. 2010

JEE

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It is important to obtain the stress frequency distribution caused by service loads in order to estimate the fatigue life of welds on vehicle truck frames. Although this distribution by service load is obtainable from vehicle running tests, it is difficult to estimate it at the design stage. Accordingly, we examined the characteristics of stress frequency obtained from past running test data, and analyzed them in conjunction with analysis on the effects of running conditions, including distance, speed and payload. The study results will be used to estimate stress frequency distribution at the stages of design or modification in train line with operating conditions.

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Fatigue Life Estimation of Welds on Truck Frames of Rolling Stock Based on Stress Frequency Distribution

Oda¹,

Yagi²,

Okino³

et al. 2009

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2305 Characteristics of Stress Frequency in Welds of Vehicle Truck Frames by Service Load and Effect of Vehicle Running Conditions on Stress Frequency

Cited by 3 publications

References 0 publications

Fatigue Life Estimation of Welds on Truck Frames for Rolling Stock Based on Stress Frequency Caused by Service Loads

Fatigue Life Estimation of Welds on Truck Frames for Rolling Stock Based on Stress Frequency Caused by Service Loads

Effects of Vehicle Running Conditions on Stress Frequency Distribution of Welds on Truck Frames for Railway Rolling Stock

Fatigue Life Estimation of Welds on Truck Frames of Rolling Stock Based on Stress Frequency Distribution

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