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Boundary effect on concrete fracture and non-constant fracture energy distribution

หน่วยงาน Central Queensland University, Australia

รายละเอียด

ชื่อเรื่อง : Boundary effect on concrete fracture and non-constant fracture energy distribution
นักวิจัย : Duan, Kai. , Hu, Xiaozhi. , Wittmann, F. H. (Folker H.)
คำค้น : Building materials. , Strategic basic research. , Concrete. , Fracture mechanics. , 861001 Cement and Concrete Materials. , 090503 Construction Materials. , 091308 Solid Mechanics. , 091599 Interdisciplinary Engineering not elsewhere classified. , Fracture energy -- Local fracture energy-- Boundary effect -- Size effect -- Fracture process zone -- Crack -- Ligament
หน่วยงาน : Central Queensland University, Australia
ผู้ร่วมงาน : -
ปีพิมพ์ : 2545
อ้างอิง : http://hdl.cqu.edu.au/10018/40070 , cqu:5111
ที่มา : Duan, K, Hu, X & Wittmann, F 2003, 'Boundary effect on concrete fracture and non-constant fracture energy distribution', Engineering Fracture Mechanics, vol. 70, pp. 2257-2268.http://dx.doi.org/doi:10.1016/S0013-7944(02)00223-0 (viewed 8/1/10)
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Engineering fracture mechanics. United Kingdom. : Pergamon, 2002. Vol. 70 (2003), p. 2257-2268 12 pages Refereed 0013-7944 1873-7315 (online) , ACQUIRE [electronic resource] : Central Queensland University Institutional Repository.
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

This paper extends the local fracture energy concept of Hu and Wittmann [29,30], and proposes a bilinear model for boundary or size effect on the fracture properties of cementitious materials. The bilinear function used to approximate the non-constant local fracture energy distribution along a ligament is based on the assumption of the proportionality of the local fracture energy to the fracture process zone (FPZ) height and characterises the FPZ height reduction when approaching a specimen back boundary. The bilinear function consists of a horizontal straight line of the intrinsic fracture energy GF and a declining straight line that reduces to zero at the back boundary. It is demonstrated that using the bilinear model, the size-independent fracture energy GF can be estimated from the fracture energy data measured on laboratory-size specimens, and the intersection of these two linear functions, defined as the transition ligament, represents the influence of the back boundary on the fracture properties. It is also demonstrated that the specimen sizealone is not sufficient to characterise the size effect in the fracture properties observed on laboratory-size specimens.

บรรณานุกรม :
Duan, Kai. , Hu, Xiaozhi. , Wittmann, F. H. (Folker H.) . (2545). Boundary effect on concrete fracture and non-constant fracture energy distribution.
    กรุงเทพมหานคร : Central Queensland University, Australia.
Duan, Kai. , Hu, Xiaozhi. , Wittmann, F. H. (Folker H.) . 2545. "Boundary effect on concrete fracture and non-constant fracture energy distribution".
    กรุงเทพมหานคร : Central Queensland University, Australia.
Duan, Kai. , Hu, Xiaozhi. , Wittmann, F. H. (Folker H.) . "Boundary effect on concrete fracture and non-constant fracture energy distribution."
    กรุงเทพมหานคร : Central Queensland University, Australia, 2545. Print.
Duan, Kai. , Hu, Xiaozhi. , Wittmann, F. H. (Folker H.) . Boundary effect on concrete fracture and non-constant fracture energy distribution. กรุงเทพมหานคร : Central Queensland University, Australia; 2545.