Check the determinacy of the structures i W A

1. Classify each of the structures shown in the figure as externally unstable, statically determinate, or statically indeterminate. If the structure is statically indeterminate externally, then determine the degree of external indeterminacy. Hinge Hinge a. C. DANIE BO B Coordinovan) SONHNISH Hinge WARRAS HARRAS Hinge Hinge b. DAMEN OVOŠÁRTÁTNOBITAKACHO Hinge for CANE

Circle One Materials that undergoes plastic deformation prior to failure is said to be "brittle." 2. Tor F Тor F 3. Grain structure of metals is not affected by plastic strain such as making wire. T or F 4. The mechanical behavior of all materials is affected by temperature. T or F 5. Elastic deformation does not change the arrangement of atoms in materials. T or F б. Materials that show plastic deformation are ductile. T-or F 7. A true elastic behavior reaches an instantaneous yield point. T or E Repeated loadings may create stresses that are less than the strength of the material which leads to "fatigue failure." 8.

Define the elemental stiffness matrix for element 2-3 in the given truss structure 1 45 90 45 2 3