8843
Parametric studies show that the competition between inter-layer failure and max principal stress failure largely affects the kinked cracks .
 failure, principal stress, failure
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:
 failure, principal stress, failure