What are the 4 steps for FEA Analysis scheme for Truss
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1. Divide the truss into Bar/truss Elements connected to each other through
nodes
2. Describe the behavior of each bar element (derive stiffness matrix and load
vector and Global Coord. Sys.
3. Describe behavior of entires truss by putting together behavior of each of
the bar elements (by assembling their stiffness matrices and load vectors)
4. Apply appropriate boundary conditions
A Plane element must contain at least _ nodes
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, 3
Which statement are true of the Gaussian Quadrature method:
If a function f(x) is not a polynomial, Gaussian Quadrature is exact.
Accuracy depends on how well the polynomial fits the given curve.
Will not yield exact integration of the ratio of the two polynomials.
It is exact if the integrand is a polynomial of degree 2n-1 or more.
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1 through 3
what shape/situation used plane strain
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Long, bodies with constant cross sectional area. Loads that act only in the X
and/or Y direction and do not vary in the Z direction
The Method often used to describe the finite element equations and stiffness matrix for
the Constant Strain Triangle.
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, Theorem of minimum potential energy
Smaller elements are needed when modeling:
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Transitions from one width to another where a fillet occurs
Near holes in a model
Near changes in load
What is the polynomial degree of a function used for the LST Element
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2 (quadratic)
Which of the following most likely describes the basic triangular element show in the
figure?
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Give this one a try later!
1. Divide the truss into Bar/truss Elements connected to each other through
nodes
2. Describe the behavior of each bar element (derive stiffness matrix and load
vector and Global Coord. Sys.
3. Describe behavior of entires truss by putting together behavior of each of
the bar elements (by assembling their stiffness matrices and load vectors)
4. Apply appropriate boundary conditions
A Plane element must contain at least _ nodes
Give this one a try later!
, 3
Which statement are true of the Gaussian Quadrature method:
If a function f(x) is not a polynomial, Gaussian Quadrature is exact.
Accuracy depends on how well the polynomial fits the given curve.
Will not yield exact integration of the ratio of the two polynomials.
It is exact if the integrand is a polynomial of degree 2n-1 or more.
Give this one a try later!
1 through 3
what shape/situation used plane strain
Give this one a try later!
Long, bodies with constant cross sectional area. Loads that act only in the X
and/or Y direction and do not vary in the Z direction
The Method often used to describe the finite element equations and stiffness matrix for
the Constant Strain Triangle.
Give this one a try later!
, Theorem of minimum potential energy
Smaller elements are needed when modeling:
Give this one a try later!
Transitions from one width to another where a fillet occurs
Near holes in a model
Near changes in load
What is the polynomial degree of a function used for the LST Element
Give this one a try later!
2 (quadratic)
Which of the following most likely describes the basic triangular element show in the
figure?
Give this one a try later!
