초록

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본 논문에서는 사질토의 취성적 응력-변형률 관계와 전단시 체적팽창을 고려할 수 있는 구성모델에 대한 연구를 수행하였다. 제안된 모델은 일반등방경화규칙에 의거한 비등방 경화규칙을 적용하였으며, 항복면의 형태는 응력공간에서 원통형으로 나타나는 단순한 형태로 실용적으로 적용하기 편리하도록 하였다. 또한 유동규칙을 단순화하여 구체적인 팽창률 함수를 이용하여 정의하였다. 또한 가상적인 첨두응력비를 정의하여 취성적 응력-변형률 관계를 모델링하는 것이 가능하였다. 이러한 구성모델은 수학적 정식화를 한 후 실험자료와 비교하도록 프로그램을 구현하였다. 동반논문에서는 삼축실험결과와 비교하여 검증할 것이다.

Abstract ▼ AI-Helper

This study is focused on the constitutive model in order to represent brittleness and dilatancy of cohesionless soils. The constitutive model was proposed on the basis of an anisotropic hardening rule with generalized isotropic hardening rule. The shape of yield surface is a simple cylinder type in ...

This study is focused on the constitutive model in order to represent brittleness and dilatancy of cohesionless soils. The constitutive model was proposed on the basis of an anisotropic hardening rule with generalized isotropic hardening rule. The shape of yield surface is a simple cylinder type in stress space and it makes the model practically useful. Flow rule was approximated by a concrete function on dilatancy. A peak stress ratio was defined to model brittle stress-strain relationships. The proposed model was formulated and implemented to calculate the stress-strain relationship from triaxial tests. In the companion paper the proposed model will be verified by comparison with the triaxial test results.

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