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In this article , a validation is demonstrated for a structural thermomechanical simulation model on an arbitrarily curved Directed Energy Deposition ( DED ) part : at first , the validity of the heat input is ensured and subsequently , the model ’ s predictive quality for in-situ deformation and the bulging behaviour is investigated .
 concept or principle: validation; concept or principle: thermomechanical; enabling technology: simulation; concept or principle: model; manufacturing process: Directed Energy Deposition; manufacturing process: DED; concept or principle: heat; concept or principle: model; material: s; concept or principle: quality; concept or principle: in-situ deformation
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 concept or principle: validation; concept or principle: thermomechanical; enabling technology: simulation; concept or principle: model; manufacturing process: Directed Energy Deposition; manufacturing process: DED; concept or principle: heat; concept or principle: model; material: s; concept or principle: quality; concept or principle: in-situ deformation