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We hardly ever see mud anymore--our city has a perfect shell, like an egg, so we can safely be sentimental about vanishing mire.
Optimal face sheet thickness, core thickness and core density are obtained which minimize the weight of a geometrically perfect shell with a specified load carrying capacity.
In this regard, numerous researchers have investigated the perfect shell model to analyze vibration characteristics due to the conciseness to manufacture the structure.
Design criteria monographs like NASA-SP 8007 recommend that the buckling load of the perfect shell shall be reduced by using a knock-down factor.
Imperfections, which are defined as deviations from perfect shape and perfect loading distributions, can reduce the buckling load drastically compared to that of the perfect shell.
For this type of shell structure, the buckling load of the geometrically perfect shell and the imperfection sensitivity are significantly influenced by the laminate stacking sequence.
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The largest north coast resort is Arenal d'en Castell, with several large hotels around a perfect shell-shaped bay, while neighbouring Son Parc has the island's only golf course.
Increasing the percentage of ceramic content, radius and thickness increase the buckling load while the cylinder length has not considerable effects in perfect shells.
The accuracy and capability of both methods are demonstrated using a number of numerical examples, which also allows some new insight to be gained into the postbuckling behaviour of perfect shells of revolution.
I sat on the rocks and enjoyed it for a while, collected a perfect pink shell, then tracked back.
On the road from Tank to Wana, perfect round shell-holes, punched through the mud-walls of now-empty houses, show where the army advanced.
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