Application of the digital speckle correlation method on timber with finger-joints

The research used the digital speckle correlation method to analyse the mechanical characteristics of timber with finger-joints. At first, the authors programmed to realize the function of Digital Speckle Correlation Method(DSCM). Errors and precision were analyzed with numerically simulated images. Then the application of DSCM on larch with finger-joints was investigated. The results indicated that the focus of stress was concentrated at the associative bottom and the first failure in the experiment occurred there. The length of teeth had little effect on tension of larch. The results also proved the value of using DSCM on timber with finger-joints.