Me 386

Front 1

When a model is fully supported, we say that the model does not have any rigid body motions? T OR F

Back 1

True

Front 2

You should always make very fine mesh so you do not have to worry about error: T or F

Back 2

False

Front 3

Solid, shells, and beams are all 3D elements capable of deformation in 3D space? T OR F

Back 3

True

Front 4

The process of making simplifying assumptions when creating a mathematical model of an analyzed structure:

Back 4

Idealization

Front 5

A shape function describes the shape of the element?

Back 5

False

Front 6

Stress concentration is quite similar to stress singularity? T OR F

Back 6

False

Front 7

Solid elements give the best results because they accurately model the geometry: T or F

Back 7

False

Front 8

The process of removing or repairing geometric gestures that would prevent the Mesher from creating the mesh?

Back 8

Clean up

Front 9

The mesh type appropriate for thin models

Back 9

Shell

Front 10

you do not really need error estimation; the FEA is accurate enough . T or F

Back 10

false

Front 11

a fully supported model does not have any rigid body modes: t or f

Back 11

true

Front 12

restraints(supports) are the most difficult to model and control in FEA: t or f

Back 12

true

Front 13

the number of unknowns in an fea model is equal to the actual number of degrees of freedom T or f

Back 13

true

Front 14

the distribution of in-plane stresses across the thickness is assumed to be linear in both first and second order shell elements

Back 14

true

Front 15

if solid elements are used, fixed and immovable restraints would have the same effect: t or f

Back 15

true

Front 16

the mesh type most appropriate for models with both thin and bulky part:

Back 16

mixed mesh type

Front 17

artificial constraints are unrealistic restraints (supports) applied by the user t or f

Back 17

false

Front 18

the sequence of creating a model in solidworks, manufacturing a prototype and testing it

Back 18

traditional design cycle

Front 19

in every fea, geometry should always be represented as exact as possible: true or false

Back 19

false

Front 20

a beam element does not have any physical dimensions in the directions normal to its length t or f

Back 20

true

Front 21

degenerated elements are ok as long as the are far away from stress concentrations t or f

Back 21

false

Front 22

a beam element is a line with assigned properties of a beam cross section as required by beam theory t or f

Back 22

true

Front 23

if your fea software reports no error, the solution will be correct: t or f

Back 23

false

Front 24

model geometry is the most readily controlled of all data needed to create the fea model: t or f

Back 24

true

Front 25

you should make a coarse mesh first to find the stress concentration, and then refine it as needed; t or f

Back 25

true

Front 26

a method that improves stress results by refining the mesh automatically in regions of stress concentrations

Back 26

h adaptive

Front 27

the type of analysis that can help you avoid resonance

Back 27

frequency analysis

Front 28

a method that improves stress results by increasing the polynomial order

Back 28

p adaptive

Front 29

the number of degrees of freedom that a node possesses depends on the element type t or f

Back 29

true

Front 30

if you need to apply moment to solid elements, they must be represented with appropriately applied forces

Back 30

true

Front 31

a part produced by casting or forging would generally be meshed with solid elements, while a sheet metal structure would be meshed with shell elements t or f

Back 31

true

Front 32

the types of degrees of freedom that a node of a shell element has

Back 32

translational and rotational

Front 33

a 1-D element can be of a second or third order t or f

Back 33

true

Front 34

the frequencies that a body tends to vibrate in

Back 34

natural frequency

Front 35

a number that provides a general description of the state of stress

Back 35

von misses

Front 36

normal stresses on planes where shear stresses vanish:

Back 36

principal stresses

Front 37

in solid works simulation, the immovable restraint is not available if solid elements are used alone t or f

Back 37

true

Front 38

plane stress, plane strain and axi-symmetric elements are all examples of 2D elements t or f

Back 38

true

Front 39

the process of automatic mesh creation

Back 39

auto meshing

Front 40

you do not reallly need error estimation' the fea is accurate enough

Back 40

false

Front 41

finite element analysis offers a deceiving level of detailed results

Back 41

true

Front 42

the type of error that affects fea results because fea works on an assembly of discrete elements (mesh) rather than on a continuous structure:

Back 42

discretization

Front 43

a what if scenario of analysis type, materials, restraints and loads

Back 43

static study

Front 44

moment loads can be applied directly if shell or beam elements are used t or f

Back 44

true

Front 45

the mesh type appropriate for bulky models

Back 45

solid elements

Front 46

a study that calculates how hot a design gets

Back 46

thermal study

Front 47

the process of removing or suppressing geometric features from CAD geometry to simplify the finite element mesh:

Back 47

defeaturing

Front 48

if you study deflections, not stresses, then you can use a somewhat coarser mesh true or false

Back 48

true

Front 49

the process of making simplifying assumptions when creating a mathematical model of an analyzed structure

Back 49

idealization

Front 50

the type of error that affects fea results because fea works on an assembly of discrete elements (mesh) rather than a continuous structure

Back 50

discretization error

Front 51

the process of removing and or repairing geometric features that would prevent the mesher from creating the mesh

Back 51

clean up

Front 52

the accumulated round off error of the fea solver

Back 52

numerical error