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Mechanism behind the size effect phenomenon

หน่วยงาน Central Queensland University, Australia

รายละเอียด

ชื่อเรื่อง : Mechanism behind the size effect phenomenon
นักวิจัย : Hu, Xiaozhi. , Duan, Kai.
คำค้น : Building materials. , Cement. , Composite materials. , Strategic basic research. , 861001 Cement and Concrete Materials. , 861002 Ceramics. , 090503 Construction Materials. , 091201 Ceramics. , 091308 Solid Mechanics. , 090102 Aerospace Materials. , 090301 Biomaterials. , 091202 Composite and Hybrid Materials. , Size effect -- Cracking -- Concrete -- Ceramics
หน่วยงาน : Central Queensland University, Australia
ผู้ร่วมงาน : -
ปีพิมพ์ : 2553
อ้างอิง : http://hdl.cqu.edu.au/10018/53485
ที่มา : Hu, X & Duan, K 2010, 'Mechanism behind the size effect phenomenon', Journal of Engineering Mechanics ASCE, vol. 136, no. 1, pp.60-68.
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Journal of engineering mechanics. USA. : American Society of Civil Engineers, 2010. Vol. 136, no. 1 (January 2010), p. 60-68 9 pages Refereed 0733-9399 , ACQUIRE [electronic resource] : Central Queensland University Institutional Repository.
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

Size effect SE on quasi-brittle fracture of concrete and concretelike heterogeneous materials has been commonly demonstrated by the influence of specimen size D on the transition from strength-dominant fracture to toughness-dominant fracture for geometrically similar specimens with a common initial-crack/specimen-size ratio, i.e., a0 /D=constant. Under such a condition, size Dappears to be the single controlling parameter for SE. In this study, we clarify that the primary source of quasi-brittle fracture, the presence of a large fracture process zone FPZ in front of a crack-tip, does not follow the condition of geometry similarity even for geometrically similar specimens. This suggests that the role of FPZ is not clearly explained for SE. Therefore, this study emphasizes the interaction between FPZ and the nearest specimen/structure boundary, and the consequent SE phenomenon. The deficiencies associated with the common SE models developed by Bazant and his coworkers are discussed through comparisons with the analysis on the boundary and FPZ interaction, or the boundary effect. It is shown that quasi-brittle fracture and the transition from strength-dominant fracture to toughness-dominant fracture can occur even if specimen/structure size D is constant, i.e., size D is not the dominant factor for SE.

บรรณานุกรม :
Hu, Xiaozhi. , Duan, Kai. . (2553). Mechanism behind the size effect phenomenon.
    กรุงเทพมหานคร : Central Queensland University, Australia.
Hu, Xiaozhi. , Duan, Kai. . 2553. "Mechanism behind the size effect phenomenon".
    กรุงเทพมหานคร : Central Queensland University, Australia.
Hu, Xiaozhi. , Duan, Kai. . "Mechanism behind the size effect phenomenon."
    กรุงเทพมหานคร : Central Queensland University, Australia, 2553. Print.
Hu, Xiaozhi. , Duan, Kai. . Mechanism behind the size effect phenomenon. กรุงเทพมหานคร : Central Queensland University, Australia; 2553.