Effect of crack orientation on fatigue behavior of CFRP-strengthened steel plates

The introduction of carbon fiber reinforced polymer (CFRP) with higher Young’s modulus has broadened its application to the strengthening of steel structures, especially under fatigue loading. Most research on CFRP strengthening of steel under fatigue loading has focused on tension fatigue testing, assuming that cracks or crack-like defects propagate in pure tension mode. However, the complex details and welded connections in aging metallic...