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The Maxwell criterion for simple strut-based 3D structures is : M = b 3j + 6 Where b = the number of struts , and j = the number of joints When M < 0 the structure is bending-dominated When M 0 the structure is stretch-dominated and When M > 0 the structure is over-rigid Bending-dominated refers to the struts which tend to bend under compression of the lattice resulting in shear failure , while stretch-dominated structures are stiffer and fail in a layer-by-layer mechanism .
 concept or principle: Maxwell criterion; manufacturing process: simple; concept or principle: 3D structures; material: b; material: b; machine or equipment: struts; concept or principle: structure; concept or principle: structure; concept or principle: structure; machine or equipment: struts; machanical property: compression; concept or principle: lattice; machanical property: shear failure; machanical property: stretch-dominated structures; concept or principle: layer-by-layer
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: Maxwell criterion; manufacturing process: simple; concept or principle: 3D structures; material: b; material: b; machine or equipment: struts; concept or principle: structure; concept or principle: structure; concept or principle: structure; machine or equipment: struts; machanical property: compression; concept or principle: lattice; machanical property: shear failure; machanical property: stretch-dominated structures; concept or principle: layer-by-layer