Which of the following assumptions are true for a static analysis in SOLIDWORKS Simulation with small displacements?

For static analysis in SOLIDWORKS Simulation, the assumption that inertia effects are negligible and loads are applied slowly is fundamental. This assumption means that the analysis considers only the static conditions, where the influence of time-dependent forces (like acceleration) on the structure is ignored. When loads are applied slowly, the resulting response of the material is more predictable and allows for linear analyses, which is a key aspect of small displacement assumptions.

This assumption also means that the system reaches a static equilibrium without any dynamic effects altering the results, thus ensuring that the response is primarily due to the applied loads rather than any time-dependent behaviors such as vibrations or dynamic loading conditions. This leads to clearer insights into how the model behaves under static load conditions, allowing for effective design analysis and material selection.

The other options, while they might discuss relevant concepts, do not adhere to the standard assumptions of static analysis. For instance, a model being not fully elastic suggests that it might exhibit plastic behavior under certain loads, which contradicts the basic premise of static analysis focused on linear elastic materials. The proportionality of results to loads is a characteristic of linear analysis, but it must also be paired with assumptions about the elastic and displacement parameters to fully define the context of a static analysis.