Fracture in Steel – Brittle fracture in ductile material

Brittle Cracking of a Wide Flange Beam

Fracture in Steel – Brittle fracture in ductile material Brittle failure is the brisk propagation of cracks through a material. This typically occurs so quickly that no plastic deformation takes place before fracture occurs. In structure failures, brittle failure usually causes a failure in structural integrity. Because of the rapid nature of this failure, it often leads … Read more

Yield Stress of a Material – Simple Explanation

Yielding of Steel

Yield Stress of a Material – Simple Explanation Yield of a material is explained as the stress at which a material begins to deform irreversibly. Preceding the yield point, the material will deform elastically, meaning that it will return to its original shape when the applied stress is removed (i.e. no permanent, visible change in … Read more

Lateral Torsional Buckling in Beams = Lateral Deflection + Torsion

Lateral Torsional Buckling of a Beam Girder

Lateral Torsional Buckling in Beams = Lateral Deflection + Torsion Summary Lateral torsional buckling occurs when an applied load causes both lateral displacement and twisting of a member. This failure is usually seen when a load is applied to an unconstrained, steel I-beam, with the two flanges acting differently, one under compression and the other … Read more

D-Cracking (Durability Cracking) – Cause & Prevention

Durablity Cracking in Concrete Slab

D-Cracking (Durability Cracking) –  Cause & Prevention Summary D-cracking is cracking in concrete pavements caused by freeze-thaw cycles deteriorating the aggregate in concrete.  Water naturally accumulates at the base and sub-base layers under concrete.  When this water suffers from freeze-thaw cycles it wears on the durability of the concrete and begins to crack in the … Read more

Carbonation of Concrete – Various Failure Mechanisms of Concrete

carbonated RCC

Carbonation of Concrete – Various Failure Mechanisms of Concrete What is Carbonation-Process Carbonation is the formation of calcium carbonate (CaCO3) by a chemical reaction in the concrete. The creation of calcium carbonate requires three equally important substances: carbon dioxide (CO2), calcium phases (Ca), and water (H2O). Carbon dioxide (CO2) is present in the surrounding air, … Read more