کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
279545 | 1430332 | 2009 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: On the volumetric part of strain-energy functions used in the constitutive modeling of slightly compressible solid rubbers On the volumetric part of strain-energy functions used in the constitutive modeling of slightly compressible solid rubbers](/preview/png/279545.png)
A popular model for the finite element simulation of slightly compressible solid rubber-like materials assumes that the strain-energy function can be additively decomposed into a volumetric part and a deviatoric part. Based on mathematical convenience, the volumetric part is usually assumed to be a finite polynomial in the volume change. Experimental evidence suggests that for solid rubbers in compression, this polynomial can be taken to be a simple quadratic for moderate deformations and that this function also adequately models the volume change and the stress/stretch relation for materials in simple tension, up to stretches of order 100%. For larger tensile deformations, however, experimental data suggest that the Cauchy stress-volume change relation has an increasingly large slope and therefore a truncated Taylor series expansion is not the most appropriate. A rational function approach is proposed here as an alternative.
Journal: International Journal of Solids and Structures - Volume 46, Issue 16, 1 August 2009, Pages 3078–3085