PENGUJIAN MODEL PIPA PESAT KAYU PADA KONDISI KERING UDARA DAN JENUH AIR
Wood stave pipeline in this study was used to bring prezurized water to generate PaT (Pumps Used as Turbines) for lifting the water flow from underground river to the surface in Seropan Cave, Gunungkidul Yogyakarta. This experimental study of wood stave pipeline made from Durian wood was carried out...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2012
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/99828/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=56196 |
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| Institution: | Universitas Gadjah Mada |
| Summary: | Wood stave pipeline in this study was used to bring prezurized water to
generate PaT (Pumps Used as Turbines) for lifting the water flow from
underground river to the surface in Seropan Cave, Gunungkidul Yogyakarta.
This experimental study of wood stave pipeline made from Durian wood
was carried out through loading of internal pressure gradually in phases up to
reach 2,7 bar under dry and water saturated conditions. The observation of
displacement was taken by using LVDT at above, left and right, and under
positions of the wood stave. The observation was also carried out to the wooden
stress at longitudinal and tangential directions as well as the stress on the ring
stiffener. Some physical and mechanical properties of several wood species, used
as the alternative wood stave material other than Durian wood, were also
inspected. The inspection of physical properties included the moisture content and
density. The inspection of mechanical properties included the tests of bending
strength and compressive perpendicular to grain. Results of the test were then
compared to the utilization value of the wood stave design in Seropan Cave, as
recommended in the results of the research carried out by Karlsruhe Institute of
Technology (KIT), Germany for the finite element models.
The test results at 2,7 bar internal pressure under water saturated
condition and 40 cm ring stiffener distance and added with swelling stress
indicated that the highest radial displacement, wood longitudinal stress, wood
tangential stress and ring stiffener stress were 5,4 mm, �L = 11,590 MPa (65,87%
MORr), �T = 4,559 MPa (48,01% fc,90,r) and 132,871 MPa (44,29% �y),
respectively. Durian wood, based on the study, showed that the bending strength
and compressive strength perpendicular to grain at 10% strain were 20,7 MPa
and 14,17 MPa, respectively. Results of KIT research on the finite element model
recommended that the value of wood stress utilization and axial force were
48% and 60%, respectively. The test results on Durian wood stave pipe indicated
that the stress, based on the experiment, was close to the finite element model.
Durian wood was categorized in strength class C20 (bending strength 20 MPa)
where as the recommended wood strength is in strength class C24
(24 MPa bending strength). It can be concluded that Durian wood can be used as
the material for wood stave pipeline. |
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