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Major findings in studies on non-linear TO include : 1 ) the difference between linear and non-linear modelling of large deformations is particularly evident in buckling and snap-through scenarios ; 2 ) a non-linear analysis made insignificant changes to the stiffness/compliance of a linear elastic structure but altered the topology significantly ; 3 ) non-linearity assumptions are beneficial for realizing compliant mechanisms ; 4 ) issues with excessive distortions or convergence of the numerical model can be solved .
 concept or principle: non-linear modelling; concept or principle: deformations; machanical property: buckling; concept or principle: non-linear analysis; engineering feature: linear elastic structure; concept or principle: topology; concept or principle: compliant mechanisms; concept or principle: model; material: be
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: non-linear modelling; concept or principle: deformations; machanical property: buckling; concept or principle: non-linear analysis; engineering feature: linear elastic structure; concept or principle: topology; concept or principle: compliant mechanisms; concept or principle: model; material: be