Mechanical Properties of Primary Branches of 29 Desert Species

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Mechanical Properties of Primary Branches of 29 Desert Species

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Mechanical Properties of Primary Branches of 29 Desert Species

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Mechanical Properties of Primary Branches of 29 Desert Species

Christina Pereira

Some are tall and slender with main stem and short primary branches

Some are short and wide with less dominant stem and very long branches

Cercidium floridum

Pinus ponderosa

Cedrus atlantica

Fraxinus cuspitada

Prunus ilicifolia

Fraxinus velutina

Main Stem

Olive = Primary Branch

Main Stem

Olive = Primary Branch

Green = Secondary Branch

Main Stem

Olive = Primary Branch

Green = Secondary Branch

Orange = Tertiary Branch

Main Stem

Olive = Primary Branch

Green = Secondary Branch

Orange = Tertiary Branch

Blue = Quaternary Branch

- Mechanical stress is constant from the base to the tip of the branch.
2. Branches of Desert species will have less mechanical stress than species from New York

3. The addition of secondary branches is a reiterative process in the mechanical structure of tree branches.

4. Mechanical stresses of primary branches are constant among tree species

Bending Moment (M) [low]

Bending Moment (M) [intermediate]

Bending Moment (M) [high]

- Diameter of segment
- Length of segment
- Weight of segment
- Weight of Side branches

Example 2: Pinus thunbergii

New York

Combine the two histograms, ny and desert

Alex is correcting the graph

- Small table of means of desert vs new york slopes
- Desert = 0.048 slope
- New york = 0.072 slope
- T test probability = 0.0072
- Conclusion: they are different
- Thus the main reason why have lower stress values have less weight near the tips

Need to ask Alex to make graph

- Graph of new york cum v/l
- Are they different? If so make table
- Is this enough?
- If not then we do terminals vs main for desert only