Application Engineering

Application Engineering is all about the Planning, designing and implementation of technology.

Application Engineer role on the sales team is to represent the product from a technical standpoint so that sales person can handle the selling and business issues.

Nonlinear Structural Analysis-Applications in Engineering

The term stiffness defines the difference between linear and nonlinear analysis. Stiffness is a property of a design that characterizes its response to the applied load. Strength is a ability of the material to support a load without physical failure but Stiffness is the ability of the material to distribute a load and resist deformation or deflection in functional failure.There are three primary factors which affect stiffness. These factors are shape, material, and part support(contact) and because of them three types of non linearity occur in the simulation: Geometry non linearity(shape), Material non linearity (material), Boundary(contact). Based on the simulation of these nonlinearities following types are come in analysis:

Strength analysis
In strength analysis evaluation is carried out to know How much load can the structure support before global failure occurs.

Deflection analysis
Deflection analysis is carried out when deflection control is of primary importance of analysis interest in simulation.

Stability analysis
Finding critical points such as limit points or bifurcation points closest to operational or functional range of the structure.

Service configuration analysis
Finding the operational equilibrium form of certain slender structures when the fabrication and service configurations are quite different for example cables, inflatable structures, helicoids and many more.

Reserve strength analysis
Finding the load carrying capacity beyond critical points to assess safety under abnormal conditions.

Progressive failure analysis
A type of stability and strength analysis in which progressive deterioration is considered for example cracking in the structure.

Envelope analysis
A combination of previous analyses in which multiple parameters are varied and the strength information thus obtained is condensed into failure envelopes. A performance assessment of designed building envelope components, including assemblies and junctions, for a specific climate.

Stress-Strain/linear-non linear in Engineering

In tensile loading, the applied stress is linearly proportional to the induced strain, and it call as elastic deformation. The relationship between the applied stress s and the strain being induced e is as:

                                                                            s = E e

When the applied stress exceeds the elastic region, plastic deformation takes place, i.e. the applied stress is no longer proportional to the strain. The point where the non-linearity of the stress-strain relationship begins is known as the proportional limit. The applied stress is related to the  induced strain in the plastic deformation region by the following equation: 

                                                                            s = K e ⁿ

The ultimate tensile strength is the maximum stress level on the engineering stress-strain curve and it is the maximum stress that can be withstand by a structure in tension. All deformation before this point is uniform throughout the narrow region of the material. After which, subsequent deformation is confined to a small constriction or neck and as the area on which the load is acting on reduces, a smaller load is required to produce a greater deformation. Ultimately, fracture occurs at the neck.

Engineering Materials Ductile Vs Brittle

When you select the material for design, you must be very sure about functionality and applications of the product. There are different aspects that can affect the product such as Yielding, Toughness, Hardness, Thermal conductivity etc.

Ductile materials are those which can undergo plastic deformation under the tensile loading and it is the ability to be drawn into wire. Ductile materials are generally used in metal forming processes.

Brittle materials do not undergo any plastic deformation that's why they fracture if load exceed yielding value. Brittle material are harder then ductile materials. Glass, Ceramic, Gray Cast Iron are some of the brittle materials examples. Brittle has less energy absorbing capacity.

In Brittle materials fracture occur before yield point but ductile materials go beyond yield point. 

A hyperelastic or Green elastic Material

A hyper-elastic or Green elastic material is a type of constitutive model for ideally elastic material for which the stress-strain relationship derives from a strain energy density function. The hyperelastic material is a special case of a Cauchy elastic material.
Linear elastic models do not accurately describe the observed material behaviour for many materials. The most common example of this kind of material is rubber. The stress-strain relationship can be defined as non-linearly elastic, isotropic, incompressible and generally independent of strain rate for rubber. Hyperelasticity provides a means of modeling the stress-strain behavior of such materials. The uses of hyperelastic material are:

The behavior of unfilled, vulcanized elastomers often conforms closely to the hyperelastic ideal. Filled elastomers are also often modeled via the hyperelastic idealization.
Biological tissues are also modeled via the hyperelastic idealization and so on.