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The experimental results indicated that the mixtures with CSA and CA showed favorable surface crack closing ability.
The nonlinearity caused by the crack closing effect is then introduced, and its effect on the vibration response near the veerings is discussed.
In order to investigate the crack deformation at different stress conditions, a two-dimensional dynamic modeling method for crack deformation under progressively increasing compressional stress normal to the crack surface is proposed to simulate the natural process of crack closing.
It was verified through various tests that the granulated CSA-based expansive agent with PVA film coating can control the time of autonomic healing and can prevent water migration via crack closing.
Uniaxial tensile strength is 4.1 N/mm2, crack opening shear transfer coefficient is 0.3 and crack closing shear transfer coefficient is 0.95.
The mechanism for the hysteretic behavior of concrete under tension compression reversals was suggested as the crack closing and opening.
Similar(45)
"That effectively bonds the crack closed," Dr. White said.
Subsequently, when the fluid inlet is exposed to a lower pressure, the fluid flows backwards (backflow) and the crack closes due to the elastic relaxation of the solid.
But he was an empathetic observer, a strong joke writer, and, as Rainbow puts it, a natural "hustler," able to sell ideas and to crack closed systems.
Mathematically the fatigue crack sample is modelled as a discrete spring with piecewise nonlinear stiffness which is assumed to be constant when the crack closes and to decrease with crack length when it opens.
When the crack closes, compressive stresses normal to the crack can be transferred.
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