Which outcome occurs in a reinforced concrete beam when sustained tensile stress exceeds concrete's cracking modulus?

💡 Explanation

When tensile stress exceeds the cracking modulus, micro-cracks initiate because the concrete's tensile capacity is surpassed, causing localized stress concentrations that lead to rapid crack propagation. Therefore, crack propagation results, rather than sheer failure, de-bonding or buckling are dependent on additional factors.

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