## What is rectangular finite element?

A finite element formulation for the static and dynamic analysis of linear-elastic space structures composed of plate- and beam-type members is presented in this study. In general, finite elements can be used efficiently for the analysis of linear-elastic structures with shear walls built by the use of tunnel forms.

## What are isoparametric element?

Isoparametric elements enable meshing an irregular domain with triangular or quadratic elements that do not maintain orthogonality between the sides of the element.

**How should one develop a four node quadrilateral element?**

4.2. The method developed with three-node triangular elements can be applied for four-node quadrilateral elements with a slight difference. The standard displacement field of a four-node quadrilateral element is bilinear.

### What is the size of material matrix for quadrilateral element?

Two mesh sizes, 10 × 100 and 5 × 50 , have been used, each composed of quadrilateral elements. A constant time increment Δ t = 0.01 s has been used.

### What is quadratic shape?

The graph of a quadratic function is a U-shaped curve called a parabola. The extreme point ( maximum or minimum ) of a parabola is called the vertex, and the axis of symmetry is a vertical line that passes through the vertex. The x-intercepts are the points at which the parabola crosses the x-axis.

**Which method of approach is useful for evaluating four noded quadratic elements?**

Gaussian quadrature

Which method of approach is useful for evaluating four noded quadratic elements? Explanation: Gaussian quadrature is to select the n Gauss points and n weights such that provides an exact answer for polynomials f(ξ) of as large ∼ degree as possible.

#### How many integration points are commonly used in computing matrices for the four node quadrilateral element?

two integrating points

The 8 x 8 stiffness matrix of the element is customarily obtained using Gauss-Legendre quadrature with two integrating points in each of the two local co-ordinate directions (see e.g. Reference 1).

#### Which option is correct about the four noded rectangular plane stress element used in FEM?

5. Which option is not correct about the four-noded rectangular plane stress element used in FEM? Explanation: The four-node quadrilateral element with linear displacements for a plane stress problem has two degrees of freedom at each node. The total degrees of freedom of the element is eight.

**What is quadratic element?**

The quadratic quadrilateral element is a two-dimensional finite element with both local and global coordinates. It is characterized by quadratic shape functions in each of the x and y directions. This element can be used for plane stress or plane strain problems in elasticity.