کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
786448 1465609 2015 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Incremental variational approach for time dependent deformation in clayey rock
ترجمه فارسی عنوان
رویکرد متنوع افزایشی برای تغییر شکل وابسته به زمان در سنگ های رسوبی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی

An extension of Lahellec (2007) incremental variational approach to geomaterials is proposed. By using an implicit time-discretization scheme, the evolution equations describing the small strains constitutive behavior of the phases can be reduced to the minimization of an incremental energy function. This minimization problem is rigorously equivalent to a nonlinear thermoelastic problem with a transformation strain that is a heterogeneous field. The new approach proposed is for Callovo-Oxfordian argillites and considers the specific properties of geomaterials such as compressibility-dilatancy transition and influence of confining pressure. An isotropic, kinematic hardening effect is also considered for the more general cases. The accuracy of the model is assessed by comparison with FE and experimental results.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Plasticity - Volume 64, January 2015, Pages 88–103
نویسندگان
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