Monitoring the cracks initiation and propagation of construction materials, as well as determining the fracture process zone, constitute two key factors to understand the damage mechanism of materials in order to control the risk of material degradation and failure. This paper demonstrates the results of a laboratory static test designed to investigate the in situ monitoring of crack tip growth in wood. LT-type single-edge notched specimens made of Chinese fir with the seam height ratio of 0.1, 0.2 and 0.3 were tested by three-point bending experiment. In this paper, acoustic emission (AE) method and digital image correlation (DIC) method were used to study the damage process of Chinese fir under monotonic loading techniques simultaneously. The results show that analyzing AE signals by considering the acoustic emission event number and the cumulative events yields interesting information on crack initiation and propagation. Based on the displacement field obtained from the DIC, the cracking displacement (COD) and crack extension length during crack propagation can be converted to provide information about the evolution of the fracture process zone at the interface. Moreover, an additional analysis of DIC and AE data indicates good correlation (involving the crack extension length and the cumulative events). It opens the possibility to characterize the crack initiation and propagation of wood materials without visible wood cracks.

监测建筑材料的裂纹萌生和扩展，以及确定断裂过程区，是了解材料损伤机制以控制材料降解和失效风险的两个关键因素。本文展示了实验室静态测试的结果，该测试旨在研究木材裂纹尖端生长的原位监测。采用三点弯曲试验对缝高比为0.1、0.2和0.3的杉木LT型单边缺口试件进行试验。本文同时采用声发射(AE)方法和数字图像相关(DIC)方法对杉木在单调加载技术下的损伤过程进行了研究。结果表明，通过考虑声发射事件数和累积事件来分析 AE 信号会产生有关裂纹萌生和扩展的有趣信息。基于从 DIC 获得的位移场，可以转换裂纹扩展过程中的裂纹位移 (COD) 和裂纹扩展长度，以提供有关界面处断裂过程区演化的信息。此外，对 DIC 和 AE 数据的额外分析表明具有良好的相关性（涉及裂纹扩展长度和累积事件）。它开启了表征木材裂纹萌生和扩展的可能性，而没有可见的木材裂纹。可以转换裂纹扩展过程中的裂纹位移 (COD) 和裂纹扩展长度，以提供有关界面处断裂过程区演化的信息。此外，对 DIC 和 AE 数据的额外分析表明具有良好的相关性（涉及裂纹扩展长度和累积事件）。它开启了表征木材裂纹萌生和扩展的可能性，而没有可见的木材裂纹。可以转换裂纹扩展过程中的裂纹位移 (COD) 和裂纹扩展长度，以提供有关界面处断裂过程区演化的信息。此外，对 DIC 和 AE 数据的额外分析表明具有良好的相关性（涉及裂纹扩展长度和累积事件）。它开启了表征木材裂纹萌生和扩展的可能性，而没有可见的木材裂纹。