Stress and strain monitoring is of great significance for wood drying.Using digital image correlation (DIC), this study measured displacement and strain changes during wood drying in real time.The results showed that when wood is dried below the fiber saturation SEJARAH PENGUASAAN SUMBER DAYA PESISIR DAN LAUT DI TELUK TOMINI point, the difference of the radial and tangential shrinkage ratio gradually increased.An analysis of tangential and radial shrinkage ratio revealed that in the early stage of drying, the tangential and radial shrinkage ratio was relatively flat; in the middle stage of drying, the shrinkage ratio began to gradually increase; and in the later stage of drying, the tangential shrinkage ratio was approximately twice as large as that in the radial direction.
Further, regarding the tangential and radial strain distribution, the radial strain distribution was more scattered than that in the tangential direction.The radial Soil attributes and efficiency of sulfentrazone on control of purple nutsedge (Cyperus rotundus L.) Atributos de solo e a eficiência do sulfentrazone no controle de tiririca (Cyperus rotundus L.) strain distribution exhibited compressive strain on both ends of the specimen, and the tensile strain was in the center.The tangential strain distribution was tensile strain on the left side of the specimen and compression strain on the right.Overall, DIC is stable and reliable, and it can be used to monitor well the stress and strain changes during wood drying.