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Key message The main achievement of this study is an extension of the existing model of Shigo of the branch–stem junction of coniferous trees by introducing the concept of a sacrificial tissue. This tissue is acting as a predetermined breaking point between branch and stem, and limits fracture and damage to a small and isolated zone within the tree. Abstract Shigo developed a macroscopic model of...
Direct measurement of strain field in a mechanically loaded Norway spruce branch–stem junction was performed by means of electronic speckle pattern analysis. Results were compared with strain distribution in a polyester cast of identical shape as the branch–stem junction, and a simplified polyester model consisting of two half-cylinders. Compared to polyester models, the branch–stem junction was characterised...
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