How to Design Quality Rotomoulded Tanks - Using HDS (Hydrostatic Design Stress) with FEA (Finite Element Analysis) to design tanks. 1st Russian Conference St Petersburg 2018

1. Как конструировать качественные
ротационные резервуары
How to Design Quality Rotomoulded Tanks
1-я КОНФЕРЕНЦИЯ РОТАЦИОННOE ФОРМОВAHИE - Россия
1ST Conference Rotomolding - Russia
2018 Санкт- Петербург, Россия
Use HDS with FEA to design tanks
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By Ian Hansen
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2. У разных полимеров разная
производительность
Different polymers have different performance
5.0MI 0.935
≥ 12.8mm @ 50mm high
•HDB 6.89MPa
•HDS 3.27MPa (3.45MPa <9.5mm)
3.0MI 0.939
≥ 10.2mm @ 50mm high
• HDB 8.62MPa
• HDS 4.09MPa (4.31MPa <9.5mm)
Разница толщины стенок Wall difference = 2.6mm или 25%
Использование ASTM D1998 и HDB Такой же PE, Тот же
производитель, Разная оценка, = 25% Разница в толщине
Same PE, Same manufacturer, Different grade, = 25% Difference in thickness
HDS 3.27 vs 4.09
2
UseLongTermdata-HDS

3. Howtocalculatewall
thicknessusingHDS
2

4. 1-я КОНФЕРЕНЦИЯ РОТАЦИОННOE ФОРМОВAHИE - Россия
1ST Conference Rotomolding - Russia
Stressnothighlighted
byASTMD1998
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Source : ICO Polymers
Трещина
Напряжение на выходе
Outlet Stress
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5. 1-я КОНФЕРЕНЦИЯ РОТАЦИОННOE ФОРМОВAHИE - Россия
1ST Conference Rotomolding - Russia
StresshighlightedbyFEA
Напряжение вокруг выхода, выделенное FEA
Stress around outlet, highlighted by FEA
Расчеты HDS в ASTM D1998 не учитывают выходные отверстия
HDS calculations in ASTM D1998 do not take outlets, ribs, floor or roof into account
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6. 1-я КОНФЕРЕНЦИЯ РОТАЦИОННOE ФОРМОВAHИE - Россия
1ST Conference Rotomolding - Russia
Напряжение, вызванное плоскими панелями,
предназначенными для выпускного отверстия
Stress caused by flat panels designed for outlet
Плоская
панель
Высокая
нагрузка
Higher
Stress
Flat
panel
Плоская
панель
Flat
panel
Higher Stress
StresshighlightedbyFEA
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7. 1-я КОНФЕРЕНЦИЯ РОТАЦИОННOE ФОРМОВAHИE - Россия
1ST Conference Rotomolding - Russia
FEAcananalyseanything
AS/NZS4766 FEA сможет проанализировать любую форму
AS/NZS4766 & FEA can analyse any shape
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8. 1-я КОНФЕРЕНЦИЯ РОТАЦИОННOE ФОРМОВAHИE - Россия
1ST Conference Rotomolding - Russia
GarbageIn=GarbageOut
Garbage
Results
Perfect
model
Garbage
Data
Garbage
Results
Garbage
Model
Perfect
Data
Плохая FEA конструкция
Bad FEA design
AS/NZS 4766 only allows qualified professional engineers to verify the design calculations.
Not every engineer or designer can meet the requirements of AS/NZS 4766
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9. BenefitsofGoodDesign
Why invest in FEA (Finite Element Analysis)?
1-я КОНФЕРЕНЦИЯ РОТАЦИОННOE ФОРМОВAHИE - Россия
1ST Conference Rotomolding - Russia
Smart design can Reduce costs, or Improve quality,
or achieve Both.
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10. 2018 Санкт- Петербург, Россия
Olga Zauzelkova & Michelle Lorenzo Ian Hansen & Leisa Donlan
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11. Over 30 years experience in the plastics industry.
15 years in colour compounding and grinding of powders
17 years in rotational moulding operations.
3 years as independent consultant to global rotomoulding industry
Ian has previously served as President of ARMA (Association of Rotational
Moulders Australasia)
Also served on the board of ARMO (Affiliation of Rotational Moulding Organisations)
14 years have been involved in the manufacture of water and chemical tanks, using
a variety of equipment; from rock & roll open flame machines to biaxial hot air ovens.
Lectured to rotomoulding audiences around the world on Tank Design and Tank
Standards.
Written technical articles for Rotoworld Magazine & ARMO Rotomoulder Magazine.
Currently Operations Manager at Halgan Pty Ltd
Ian Hansen
Ян Хансен
Abouttheauthor
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