On the origin of growth stresses in trees
โ Scribed by R. R. Archer
- Publisher
- Springer
- Year
- 1989
- Tongue
- English
- Weight
- 530 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0043-7719
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โฆ Synopsis
The mechanics of growth stress generation in a tissue of developing wood cells is studied by means of a continuum-mechanical model which assumes that the stresses which accumulate in the cells are induced by growth strains in the newly formed cell wall increments as they are laid down. The feasibility of the model is examined by using cell parameters both anatomical and physical to predict the variation of growth stresses with microfibril angle. In particular the measured change from tensile to compressive stresses with increasing microfibril angle for conifers is compared with the results predicted by the model.
๐ SIMILAR VOLUMES
A model for the build up of residual growth stresses in cylindrical tree stems is presented. By using Bessel functions the general equations can be solved to allow for surface strain distributions that vary both in the circumferential as well as longitudinal directions. An arbitrary surface strain d
Growth stress distributions in trees are derived using the hypothesis that longitudinal and circumferential growth strains are continuously induced at the periphery of the growing stem. A plane strain combined with pure torsion model is used to compute the internal stresses and strains due to forces
An important relationship has been shown between measurements of expansion of the radial dimension of cells during the lignifieation phase of differentiation, widely reported swelling of the thickness of cell walls during lignification, the fundamental mechanics of strain interactions in the three c