Trees: The Mechanical Design

Mattheck, Gerhard C.

ISBN 10: 3540542760 / ISBN 13: 9783540542766

Editore: Springer, 1991

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Titolo: Trees: The Mechanical Design

Casa editrice: Springer

Data di pubblicazione: 1991

Legatura: Brossura

Condizione: New

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Riassunto:

The beauty of a knotty oak tree is different from that of a lovely flower. It is the rough beauty of an old soldier's face showing the traces of wind and sun, of harm and of victory, bearing the scars of bygone battles. It is different from the fragile, delicate beauty of a young girl which is evident to anyone at first sight. The beauty of an old and crippled tree is hidden unless perceived by the alert eye which is able to fancy or rather discern the hard trials of life the tree has ex­ perienced. Contemplating trees in this way is not much different from busying oneself with physiognomies, i.e. with the art of judging character from the features of the human face. Physiognomies is often considered a dubious science, but is prac­ ticed every day in human communication by everybody from early childhood to old age. Although we all are able to discern the angrily furrowed brow, the laughing crow's-feet below the eyes, the arrogant harsh lines around the nose, the hard narrow mouth, the gluttonous lip, and the secret eye of the silent ob­ server, we would never admit to rely on such seemingly doubtful methods.

Contenuti:

1. Introduction.- 2. The absolute minimum of mechanical knowledge.- 2.1 External loading.- 2.2 Internal stresses: the response of the mechanical component to external loads.- 3. How the tree minimizes its external loading.- 4. Even load distribution: the hypothesis of constant stress on the surface.- 5. Mechanical classification of adaptive growth.- 6. Case studies.- 7. Conclusions.- References.