Numerical Modelling of Forces, Stresses and Breakages of Concrete Armour Units

Numerical analysis of the interaction of irregular waves with two dimensional permeable coastal structures

“…The spectral wave heights were 0. The representation of the larger stones (0.400 m and 0.700 m) by the continuum approximation of the Darcy-Forchheimer equation is questionable, because of the scale relative to the waves, however, the alternative is to represent the stones with for instance the immersed boundary method (Latham et al, 2014;Nielsen et al, 2013). This approach requires three dimensional computations and will increase the computational costs considerably, thus from practical considerations the Darcy-Forchheimer approximation is currently the only operational approach.…”

Numerical Study of the of Proposed Hexaloc Concrete Armor Units under Static Loading

“…The impact loads are imposed from the collision of units due to either wave-induced motions or unit placement during construction. Previous research has investigated the failure pattern of armor units under impact using drop tests [12], [13], and hydrodynamic load [2]. The unit's failure is initiated by cracking concrete in a critical region due to the exceeded tensile stress capacity.…”

“…Reference source not found.. Micro-cracking causes damages to the concrete locally near the collision or small area contact regions or under intense shearing of contacts. [16], [17] The hydrodynamic loading subjected to the A-Jacks unit was investigated by Tedesco et al [2]. The failure occurred in the interface of the leg and filleted central hub.…”