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2. Crack spacing of reinforced concrete - Wikipedia

   en.wikipedia.org/wiki/Crack_spacing_of...

   When a reinforced concrete member is put in tension, after cracking, the member elongates by widening of cracks and by formation of new cracks. Figure 1 Formation of internal cracks. Ignoring the small elastic strain in the concrete between the cracks, we can relate the crack width to the strain of the member by:

3. Fracture toughness - Wikipedia

   en.wikipedia.org/wiki/Fracture_toughness

   Concrete: 0.2–1.4 ... and the width (W). ... Also since the ASTM E 561 standard does not contain requirements on the specimen size or maximum allowable crack ...

4. Concrete cone failure - Wikipedia

   en.wikipedia.org/wiki/Concrete_cone_failure

   Anchors, experimentally show a lower load-bearing capacity when installed in a cracked concrete member. The reduction is up to 40% with respect to the un-cracked condition, depending on the crack width. [7] The reduction is due to the impossibility to transfer both normal and tangential stresses at the crack plane.

5. Fracture mechanics - Wikipedia

   en.wikipedia.org/wiki/Fracture_mechanics

   Concrete fracture analysis is part of fracture mechanics that studies crack propagation and related failure modes in concrete. [17] As it is widely used in construction, fracture analysis and modes of reinforcement are an important part of the study of concrete, and different concretes are characterized in part by their fracture properties. [ 18 ]

6. Stress intensity factor - Wikipedia

   en.wikipedia.org/wiki/Stress_intensity_factor

   where (/) is a specimen geometry dependent function of the crack length, a, and the specimen width, W, and σ is the applied stress. Linear elastic theory predicts that the stress distribution ( σ i j {\displaystyle \sigma _{ij}} ) near the crack tip, in polar coordinates ( r , θ {\displaystyle r,\theta } ) with origin at the crack tip, has ...

7. Reinforced concrete - Wikipedia

   en.wikipedia.org/wiki/Reinforced_concrete

   Deflection limits are set to ensure that crack widths in steel-reinforced concrete are controlled to prevent water, air or other aggressive substances reaching the steel and causing corrosion. For FRP-reinforced concrete, aesthetics and possibly water-tightness will be the limiting criteria for crack width control.

8. Compact tension specimen - Wikipedia

   en.wikipedia.org/wiki/Compact_tension_specimen

   The stress intensity factor at the crack tip of a compact tension specimen is [4] = [() / / + / / + /] where is the applied load, is the thickness of the specimen, is the crack length, and is the effective width of the specimen being the distance between the centreline of the holes and the backface of the coupon.

9. Cohesive zone model - Wikipedia

   en.wikipedia.org/wiki/Cohesive_zone_model

   Cohesive zone fracture model. The cohesive zone model (CZM) is a model in fracture mechanics where fracture formation is regarded as a gradual phenomenon and separation of the crack surfaces takes place across an extended crack tip, or cohesive zone, and is resisted by cohesive tractions.