Fatigue and fracture testing was performed on four engineering materials, utilizing compression pre-cracking techniques for large crack growth and a newly developed Single Edge Notched Bend specimen for small, naturally initiated cracks. Fatigue crack growth simulation results have shown that both low-cycle and high-cycle fatigue can be modeled accurately as fatigue crack growth. Testing has also shown that the starting fatigue crack growth rate of any load-shedding test has significant influence on load history effects, with lower starting rates yielding lower crack growth thresholds and...