3907
Fatigue tests and fractographic analyses were conducted to support the finite element simulations and proposed fracture mechanics model .
 Fatigue tests, fractographic analyses, support, finite element, fracture, model
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 Fatigue tests, fractographic analyses, support, finite element, fracture, model