9238
In the case of open-hole panel , the deformation and the failure index were decreased by 8 % and 55 % compared to those obtained by the unidirectional structure .
 deformation, failure, unidirectional structure
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:
 deformation, failure, unidirectional structure