Modelling and simulation of rate-dependent stress-strain behaviour of granular materials in shear

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Kongkitkul W., Tatsuoka F., Duttine A., Kawabe S., Enomotov T., Benedetto H.D.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2008

วารสาร: Soils and Foundations (0038-0806)

Volume number: 48

Issue number: 2

หน้าแรก: 175

หน้าสุดท้าย: 194

จำนวนหน้า: 20

นอก: 0038-0806

eISSN: 2524-1788

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-66149106043&doi=10.3208%2fsandf.48.175&partnerID=40&md5=a3ae6942ef48f5a27c0c7333a2e2e2f3

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

A constitutive modelling of the elasto-viscoplastic stress-strain behaviour of geomaterials in shear that has been developed within a non-linear three-component model framework is validated by simulating a comprehensive series of drained triaxial compression (TC) and direct shear (DS) tests on a wide variety of granular materials. Illustrative simulations of rate-dependent stress-strain behaviour of geomaterial under typical laboratory test conditions were performed to analyse the structure of the model. The versatility of the proposed model and its applicability to a wide variety of shear loading histories is examined and demonstrated by these simulations. The following results are shown. Commonly with different basic viscosity types, Isotach, TESRA and P&N, the viscous stress component has a positive component that increases with an increase in the irreversible strain rate, which makes feasible stable and realistic simulations of rate-dependent stress-strain behaviour, including creep deformation, based on the proposed model. With different unbound granular material types having similar relative densities, the creep strain in TC tests and creep shear displacement in DS tests that develop by sustained loading at a given shear stress level for a given period tends to decrease with an increase in the particle roundness. This trend of behaviours is explained by a decrease in the viscosity type parameter, θ, associated with an increase in the particle roundness based on the simulations of these tests.

คำสำคัญ

Direct shear, Geomaterial, Rate-dependency, Stress-strain property, Triaxial compression, Viscous property (IGC: d6/d7)