کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
802920 | 1467495 | 2012 | 6 صفحه PDF | دانلود رایگان |
Most materials compress axially in all directions when loaded hydrostatically. Contrary to this, some materials have been discovered that exhibit negative linear compressibility and, as such, expand along a specific axis or plane. This paper analyses a fundamental mechanism by using a combination of finite element simulations and analytical derivations to show that negative linear compressibility can be found in a body-centred or face-centred tetragonal network of nodes connected by a network of beams. The magnitude and direction of this behaviour depends on the cross geometry in the network.
► Most materials compress axially in all directions when loaded hydrostatically.
► We investigate the possibility of negative linear compressibility in beam structures.
► Structures are 2D rectangular and 3D tetragonal, with various beam geometry.
► We use both analytical model and finite element analysis.
► Diagonal beams generate NLC, which is maximum at aspect ratio close to two.
Journal: Mechanics of Materials - Volume 46, March 2012, Pages 123–128