Week-7 Head Impact

OBECTIVE The objective of this assignment is to mesh the given CAD model  of a car dashboard with a target element length of 4 following the given quality criteria. Since the model is plastic proper generation of midsurface and assigning of correct thickness to each surface is also required. Sl no Quality criteria Value…

OBECTIVE The objective of this assignment is to mesh the given CAD model  of plastic bottle cap with a target element length of 1 following the given quality criteria. Since the model is plastic proper generation of midsurface and assigning of correct thickness to each surface is also required. Sl no Quality criteria…

OBECTIVE The objective of this assignment is to mesh the given CAD model with a target element length of 5 following the given quality criteria. Sl no Quality criteria Value 1 Target /average length 5 2 Minimum length 2 3 Maximum length 8 4 Aspect 5 5 Warpage  15 6 Skewness 45       7 Minimum quad angle…

OBECTIVE The objective of this assignment is to mesh the given CAD model with a target element length of 5 following the given quality criteria. Sl no Quality criteria Value 1 Target /average length 5 2 Minimum length 3 3 Maximum length 7 4 Aspect 3 5 Warpage  15 6 Skewness 45 7 Jacobian 0.7 8 Minimum quad angle 45…

OBJECTIVE The objective of this assignment is to take the midsurface of the hood of the car and then mesh it with a target element length of 5 & satisfying the quality criteria given below. sl  no quality criteria Value 1 Target/average length 5 2 Minimum length 2 3 Maximum length 7 4 Aspect ratio 3 5 Warpage…

OBJECTIVE The objective of this challenge is to mesh the rear wheel holder model of a car with a target element length of 5 units and satisfying the below mentioned quality criteria. Quality criteria Sl .no Quality criteria Value 1 Aspect ratio 5 2 Skewness 45 3 Warping 15 4 Taper 0.5 5 Min length 2 6 Max length 8 7 Min…

OBJECTIVE The objective of this project is to generate a mesh with a target element size of 4 for the given inner door panel with the following quality criteria mentioned below. Quality criteria Sl no Quality criteria  Value 1 Aspect ratio 5 2 Skewness 45 3 Warping 15 4 Taper 0.5 5 Min length 2 6 Max length 6 7 Min…

OBJECTIVES The objective of this assignment is to mesh the given model following the quality criteria mentioned below and create different types of connection between the components as mentioned below. The quality criteria that should be followed is SL no Quality criteria  value 1 Aspect ratio 5 2 Skewness 45 3 Warping…

OBJECTIVE The objective of this assignment is to create a 3D tetramesh for the following models with its mentioned quality criteria. Model 1 The following model should have a target element size of 5 units with maximum element size being 7 and minimum element size being 2.Also, tet collapse is 0.15. This model should be…

OBJECTIVE The objective of this assignment is to mesh the hood of a car with a target element size of 5 following the below mentioned quality criteria. S.No Quality criteria Value 1 Aspect ratio 5 2 Skewness 45 3 Warping  15 4 Taper 0.5 5 Minimum length 2 6 Maximum length 8 7 Minimum angle quad 45 8 Maximum angle quad…

OBJECTIVE The objective of this assignment is to create a rod ,beam,spring and bar element on a model which is shown below. The rod element should be constrained with rbe2 elements and its translational degree of freedom should be constrained. Also the cross section of the rod should be a thin walled box with dimensions…

AIM  The aim of this project is to try to do a somewhat complex simulation which involves the use of most commonly used keywords in LS-DYNA and also try to do the project in a professional manner where a consistent numbering approach is used to number all the nodes, elements etc... and also do the projects in a manner…

AIM The aim of this assignment is to understand how to create joints between two different parts of deformable bodies and between rigid bodies. In this case we will try to understand the creation of four main joints revolute,spherical, translational, and rotational joints. EXPLANATION *CONSTRAINED_JOINT keyword is used…

AIMThe aim of this project is understand how to model a hyper elastic material from raw input data and validate the same. EXPLANATIONA hyperelastic material stress-strain data from a tensile test is usually represented by using a polynomial. The method used to create a polynomial curve is often used to construct the graph…

AIMThe main aim of this challenge is to understand how to model a material from raw data which is obtained from lab tests and also to validate it at the end so as to make sure that a correct material model is created which can then be used for different kinds of simulations. EXPLANATION In this challenge we are provided…

AIM The aim of this project is to understand the concept of mass scaling in explicit analysis and also understand the main parameters TSSFAC and DT2MS in mass scaling. EXPLANATION The timestep in an explicit analysis is influenced by the size of the eelement and also the mass of the element .So, in mass scaling we try…

AIM The aim of this project is to understand and calculate the HIC (Head Injury Coefficient) of a human head while it impacts on a car bonnet. EXPLANATION Pedestrian protection CAE is a part of vehicle safety engineering from a crash perspective. In a pedestrian protection analysis we look to identify and quantify the…

AIM The main aim of this project is to get familiarized with the idea of implicit analysis in FEA. The project aims to calculate the stretch ratio vs nominal stress of a cube with various element formulations using the hyperelastic material Ogden material model. EXPLANATION In this project a hyperelastic material model…

AIM In this project we are going to simulate a collision of a crashbox with a rigidwall. Here, the crashbox contains two parts and are connected by spotwelds modelled either by beam elements or solid elements. The aim of this project is to study the difference between the two methords used to model spotwelds namely, the…

AIM In this assignment  we try to set up a basic crash test in which we will simulate a simple crash box hitting on a rigid wall at a particular velocity. The aim here is to understand the very basics of a crash test and analyse the data so as to understand how certain parameters (in this case the thickness of the material…

AIM The objective of this experiment is to try to create the different essential cards or input decks needed for the simulation of a cellphone dropped from a particular height onto a rigid wall. Another main objective is to try to get a hands on experience of using the different pre and post processsing tools in LS DYNA…

An explicit analysis is used to find the current state of a system (which may be displacement after a force is applied or the angle of twist after a torque is applied) by using available boundary values and the constants that we may have measured for a system. Here the methord is to incrementally solve the system in finite…

AIM To study how to convert a property value from one system of units to another system of units as LS DYNA does not have a default system of units. Also our requirement of units may be different than standard ones. 1 Pa = 1 `N/m^2`        =1 `(kg*m)/(s^2*m^2)`        =`1*(kg*10^3*mm)/((10^3)^2*ms^2*(10^3)^2*mm^2`…