...Zdeněk P. Bažant; Hoang T. Nguyen; A. Abdullah Dönmez The recently conceived gap test and its simulation revealed that the fracture energy G f (or K c , J cr ) of concrete, plastic-hardening metals, composites, and probably most materials can change by ± 100 % , depending on the crack-parallel...

... determinate loading configuration to another, making evaluation unambiguous. For concrete, the gap test showed that moderate crack-parallel compressive stress can increase up to 1.8 times the Mode I (opening) fracture energy of concrete, and reduce it to almost zero on approach to the compressive stress limit...

...Giuseppe Ferro; Alberto Carpinteri The size effects in compression on drilled cylindrical concrete specimens obtained from a unique concrete block over a large scale range (1:19) are analyzed. The experimental results show scale effects on dissipated energy density rather than on the compressive...

...D. Wu; S. S. Law Delamination is a common type of damage in laminated fiber-reinforced polymer (FRP) composites. As FRP composites are becoming popular in upgrading and strengthening of civil concrete structures, the specific delamination damage, i.e., the FRP-concrete debonding, is considered more...

... that subscript denoting the wave mode is suppressed for brevity. concrete boundary-elements methods elastic waves In the article by Sato et al. ( 1 ), several logical and conceptual problems are found (Eqs. (16)–(19)). For example, it is obvious that Eq. (16) is just a sufficient condition to Eqs...

...Chee Kiong Soh, Professor; Yu Liu, Research Fellow; Yaowen Yang, Assistant Professor 15 03 2005 brittleness fracture mechanics elasticity concrete compressive strength plasticity We would like to highlight that one of the contributions of our papers 1 2 is to propose...

...Hirotaka Sato; Michihiro Kitahara; Tetsuo Shoji Advances in computing have allowed for the development of high performance concretes mathematically. We develop a method which combines the generalized self consistent model together with the boundary element method and the statistical averaging...

... according to the experimental observation. The loading-unloading condition is discussed and the tangent modulus is derived. Then, the determination of the modal parameters is presented. For verification, the proposed model is applied to concrete under uniaxial and biaxial loading, and the numerical results...

...M. Ghandehari; S. Krishnaswamy, Mem. ASME; S. Shah Splitting of concrete caused by pullout of deformed rebars is investigated. The influence of specimen cross section size and geometry on the relationship between the components of stress and relative displacement at the interface is evaluated...