Experimental study on z-pin bridging law by pullout test
Experimental study on z-pin bridging law by pullout test
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DOI：
10.1016/j.compscitech.2004.04.005
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发表时间：
2004-12
影响因子：
9.1
通讯作者：
S. Dai;Wenyi Yan;Hongyuan Liu;Y. Mai
中科院分区：
文献类型：
--
作者：
S. Dai;Wenyi Yan;Hongyuan Liu;Y. Mai
本文对Z形销桥联规律的评价进行了实验研究。通过Z销拔出试验测量了Z销桥接力与位移之间的关系。试验采用三种类型的试件：单个小插针、3×3个小插针(三列×三排)和3×3个大插针。对于3×3小销试件，得到了具有初始粘结、剥离和摩擦滑移的典型拔出曲线。在Z销开始脱粘之前，脱粘力达到了一个很高的峰值。剥离开始后，拔出力迅速下降到较低的值，然后在摩擦的作用下稳定地拔出销。然而，对于3×3大销的样品，很难分辨出峰值脱粘力。这项研究的主要结果除了提供一种有效和准确的方法来测量裂纹桥接规律外，还有望更好地从物理上理解Z销桥联的机理和机制。
This paper presents an experimental study on the evaluation of bridging law for a z-pin. The relationship between the z-pin bridging force and its displacement was measured by z-pin pullout tests. The tests were carried out using three types of samples with: single small pin; 3×3 small-pins (three columns×three rows) and 3×3 big-pins. For 3×3 small-pins samples, a typical pullout curve with initial bonding, debonding and frictional sliding was obtained. A high peak value of the debonding force was reached before z-pin debonding started. After debonding was initiated, the pullout force dropped rapidly to a lower value, the pins were then pulled out steadily against friction. However, for samples with 3×3 big-pins, it was difficult to discern the peak debonding force. The major results of this study are expected to provide a better physical understanding of the mechanics and mechanisms of z-pin bridging, aside from an efficient and accurate methodology to measure the crack-bridging law.