不同应力上限和加载速率下的黄砂岩疲劳特性研究
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肖峰,曹平,刘智振,张子洋
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Study on Fatigue Characteristics of Yellow Sandstone Under Different Stress Upper Limits and Loading Rates
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Feng XIAO,Ping CAO,Zhizhen LIU,Ziyang ZHANG
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表1 疲劳加载试验参数及应变结果
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Table 1 Fatigue loading test parameters and strain results
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试件编号 | 下限应力比 | 上限应力比 | 疲劳速率/(N·s-1) | 疲劳寿命/次 | 控制点应变/% | 破坏点应变/% | 相对差值/% |
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YS-80 | 0.50 | 0.80 | 500 | 410 | 1.1540 | 1.1346 | -1.68 | YS-85 | 0.50 | 0.85 | 500 | 238 | 1.1536 | 1.1220 | -2.74 | YS-90 | 0.50 | 0.90 | 500 | 172 | 1.1532 | 1.1253 | -2.42 | YS-95 | 0.50 | 0.95 | 500 | 79 | 1.1517 | 1.1670 | 1.33 | YS-600 | 0.50 | 0.95 | 600 | 6 | 1.1517 | 1.1653 | 1.18 | YS-700 | 0.50 | 0.95 | 700 | 10 | 1.1517 | 1.1618 | 0.87 | YS-800 | 0.50 | 0.95 | 800 | 18 | 1.1517 | 1.1970 | 3.93 | YS-900 | 0.50 | 0.95 | 900 | 64 | 1.1517 | 1.1691 | 1.51 |
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