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首页> 外文期刊>Nature reviews Cancer >Experimental Fatigue Life Investigation on a Standard PMMA Compact Tension Specimen Equipped by the Lock Technique
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Experimental Fatigue Life Investigation on a Standard PMMA Compact Tension Specimen Equipped by the Lock Technique

机译：锁定技术配备标准PMMA紧凑张力标本的实验疲劳寿命研究

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摘要

The lock technique is a method to decrease crack growth by putting a lock on the crack which the focus of this study is to experimentally characterize the influence of the lock technique on crack growth behavior and life assessment. In this study, polymethyl-methacrylate rectangular standard compact tension plates were used as the test samples. Three different edge crack and lock configurations were tested for total six samples in order to assess fatigue life and fracture resistance, and experiments were conducted using a high-frequency fatigue test machine that applies cyclic tension-compression loads to the samples. In this study, effects of varying lock and hole geometry on crack initiation and propagations are investigated. Detecting of the crack initiation life and assessing crack propagation life from crack initiation until fracture moment are investigated. The experimental results show that the crack growth life is reduced in the lockless standard cracked specimen compared to the locked samples, and similarly, fracture strength in specimens equipped with the lock is more in comparison with the lockless specimens.
机译：锁定技术是一种通过将锁定在本研究的重点进行实验表征锁定技术对裂纹生长行为和寿命评估的影响下降低裂纹增长的方法。在该研究中，使用聚甲基 - 甲基丙烯酸酯矩形标准紧凑型紧凑型张紧板作为试验样品。测试了三种不同的边缘裂缝和锁定配置，总共六个样品，以评估疲劳寿命和裂缝抗性，并且使用高频疲劳试验机进行实验，该试验机将循环张力载荷施加到样品上。在该研究中，研究了改变锁定和孔几何形状对裂纹启动和传播的影响。研究了裂纹启动寿命和评估裂纹繁殖寿命，从裂缝开始，直至裂缝矩进行裂缝。实验结果表明，与锁定样品相比，锁定标准裂纹标本中的裂纹生长寿命减少，并且类似地，与锁定标本相比，配备锁的标本中的断裂强度更像。

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