Menu

Executive Programs

Workshops

Projects

Blogs

Careers

Placements

Student Reviews


For Business


More

Academic Training

Informative Articles

Find Jobs

We are Hiring!


All Courses

Choose a category

Mechanical

Electrical

Civil

Computer Science

Electronics

Offline Program

All Courses

All Courses

logo

CHOOSE A CATEGORY

Mechanical

Electrical

Civil

Computer Science

Electronics

Offline Program

Top Job Leading Courses

Automotive

CFD

FEA

Design

MBD

Med Tech

Courses by Software

Design

Solver

Automation

Vehicle Dynamics

CFD Solver

Preprocessor

Courses by Semester

First Year

Second Year

Third Year

Fourth Year

Courses by Domain

Automotive

CFD

Design

FEA

Tool-focused Courses

Design

Solver

Automation

Preprocessor

CFD Solver

Vehicle Dynamics

Machine learning

Machine Learning and AI

POPULAR COURSES

coursePost Graduate Program in Hybrid Electric Vehicle Design and Analysis
coursePost Graduate Program in Computational Fluid Dynamics
coursePost Graduate Program in CAD
coursePost Graduate Program in CAE
coursePost Graduate Program in Manufacturing Design
coursePost Graduate Program in Computational Design and Pre-processing
coursePost Graduate Program in Complete Passenger Car Design & Product Development
Executive Programs
Workshops
For Business

Success Stories

Placements

Student Reviews

More

Projects

Blogs

Academic Training

Find Jobs

Informative Articles

We're Hiring!

phone+91 9342691281Log in
  1. Home/
  2. Shivaram Valagadri/
  3. 6. Frontal Crash Simulation

6. Frontal Crash Simulation

AIM: To perform frontal crash analysis of the neon car model and obtain the simulation results and plot the required graphs. OBJECTIVES OF THE PROJECT: To set up the car model for frontal crash analysis. To create appropriate interface for the model. To check the model for intersections and penetrations. To create a rigid…

  • RADIOSS
  • Shivaram Valagadri

    updated on 20 Jul 2021

AIM:

  • To perform frontal crash analysis of the neon car model and obtain the simulation results and plot the required graphs.

OBJECTIVES OF THE PROJECT:

  • To set up the car model for frontal crash analysis.
  • To create appropriate interface for the model.
  • To check the model for intersections and penetrations.
  • To create a rigid wall for the model to crash.
  • To assign mass to the model upto 700kg.
  • To perform mass balancing and bring the COG of the model to the desired region.
  • To assign initial velocity of 35mph.
  • To procure the desired output results.


PROCEDURE:

  • The first step is to import the model in the Radioss profile.
  • Go to FILE > IMPORT > SOLVER DECK > BROWSE > OPEN.
  • Frontal crash model

 

  • Unit System -
  • Now, we have to check the unit system for the solver.
  • Go to MODEL > CARDS > BEGIN CARD to check the unit system. For this model we are following the kg, mm, ms unit system.
  • unit system

 

  • Time step -
  • Go to MODEL > CARDS > ENG_DT_NODA > TMIN = 0.0001. This will set the time step for the analysis.
  • Time step

 

  • Intersections and Penetration check -
  • Next, we will check the interfaces and penetrations. Go to TOOLS > PENETRATION CHECK > COMPONENTS > ALL > CHECK.
  • intersection and penetration check
  • We can see that there are no intersections and penetrations in the model.

 

  • Interface contact -
  • Now, go to SOLVER > INTER and delete the predefined interfaces. Now, CREATE > INTERFACE > TYPE 7 with the recommended parameters. We define the interface for all the components.
  • Components for master and slave nodes

Istf=4, Igap=2, Idel=2, Fscale_gap=0.8, Stmin=1KN, Fric=0.2, Gapmin=0.5, Iform=2 and Inacti=6.

  • Interface type_7
  • The interface type7 is used because this is used for self intersection node to surface type contact.

 

  • Rwall Plane - 
  • Now, we have to create a rigid wall. Go to SOLVER > CREATE > RWALL > PLANE. Select the outermost elemental node on the bumper for the Rwall plane. The plane will be in X-axis, hence give the normal in X-axis as -1. Give a gap of 5 mm in the X-axis such that the plane does not intersect the bumper. Provide search distance as 1000mm and Friction=0.1.
  • Rwall_plane
  • The rigid wall will be created.
  • Rigid_wall

 

  • Initial Velocity - 
  • Now, we have to provide initial velocity for the model. Go to SOLVER > CREATE > INIVEL > TYPE: TRANSLATIONAL IN X > GRND_ID= COMPONENTS=ALL. The conversion of 35mph in mm/ms is 15.6464.
  • Initial velocity

 

  • Mass balancing - 
  • Now, we have to balance the mass and obtain the COG in the desired region. The initial mass is observed to be 188kg. The COG of the vehicle is as shown in the black circle.
  • COG before mass balancing
  • We have to bring the mass to 700kg approx for the whole model and the COG should be below the driver’s seat. So to obtain the required CG location, we have to do mass balancing by adding mass at the rear and at the front.
  • Go to SOLVER > CREATE > ADMASS > MASS TYPE = 0 > GRND_ID > SELECT NODES > MASS.
  • admass rear  admass front
  • Total mass
  • In, this way the mass balancing is performed to get the required COG. The total mass of the model is brought approximately to 700kg. The added mass location is as shown in the black circles.
  • Admass location
  • The COG of the model is as defined by the black cirle.
  • COG location
  • Desired COG

 

  • Accelerometer - 
  • Now, we have to define accelerometer below the B-pillar. Go to SOLVER > CREATE > ACCELEROMETER > NODE_ID > FCUT=1.64. Create accelerometer at both right and left side.
  • accelerometer card
  • Accelero Location

 

  • Sections -
  • Next, we have to obtain the results for the defined cross sections. For that first we have to create moving frames. Go to SOLVER > CREATE > FRAMES > MOVING > CREATE BY NODE REFERENCE > ORIGIN > X-AXIS > XY PLANE > CREATE.
  • Frames_moving
  • Then go to SOLVER > CREATE > SECT > FRAME_ID > DELTA T=0.1 > ALPHA = 1.94 > IFRAME = 12.
  • Section card
  • Similarly, we will create the moving frames and sections at the desired areas on the left and right side of the model. Totally, there will be 10 sections.
  • Frames and sections

 

  • Intrusions - 
  • Next, we have to create intrusions. To find the results we have to create moving frames at seat parts. Then, go to MODEL > OUTPUT BLOCKS > CREATE > INTRUSIONS > NODE_ID > I_SKEW. This will give the output result for the intrusions.
  • Intrusion card
  • Intrusion location and skews

 

  • Output blocks - 
  • Next, we have to define the outputs. Go to MODEL > OUTPUT BLOCKS > CREATE > ACCELEROMETER and SECTIONS and RWALL CARDS.
  • Output Block
  • This will define Radioss that these output results should be provided after simulation.

 

  • Model Checker -
  • At last, go to TOOLS > MODEL CHECKER > RADIOSS BLOCK > RIGHT CLICK ON ERROR > RUN. This will run the model checker for any errors if any.
  • Model checker
  • We have no errors in the model and hence we can proceed to run the simulation.

 

  • Analysis tool -
  • Go to ANALYSIS > RADIOSS > INPUT FILE > INCLUDE CONNECTOR > OPTIONS = -NT 4 > RADIOSS.
  • analysis tool
  • This will run the Radioss simulation.
  • Open .out engine file from saved folder and check final value of Energy error, Mass error, Simulation time and Total no of cycles.
  • energy error and mass error
  • Here, the energy error is shown in the red box and mass error in the blue box.

 

  • no of cycles
  • We can see that Radioss took 6hrs and 21 minutes to run the simulation file.
  • Click on view Results, which will open Hyperview window.

 

  • Hyperview - 
  • In Hyperview go to CONTOUR > RESULT TYPE > VON MISES > AVERAGING METHOD > SIMPLE > APPLY.
  • Von misses stress simulation
  • In the above crash simulation the neon car model is seen to be impacting the rigid wall, the vehicle body is seen to bending around the COG point. Hence, the location of the COG of the vehicle is the most important and is kept under the driver seat for safety of the driver. Also, the deformation seems unrealistic as the model is a reduced scale model due to software constraints. The maximum stress concentrations in the vehicle are few and the impact energy is fairly distributed along the body.
  • The maximum von-misses stress obtained is 0.3629. 
  • In Hyperview go to CONTOUR > RESULT TYPE > PLASTIC STRAIN > AVERAGING METHOD > SIMPLE > APPLY.
  • Plastic strain simulation
  • The plastic strain is observed in the front bumper region where the kinetic energy is absorbed in the front region safeguarding the passenger region.
  • Maximum plastic strain obtained is 0.703.

 

  • Hypergraph 2D -
  • Open Hypergraph 2D and load T01 file.
  • Go to GLOBAL VARIABLES > INTERNAL ENEGRY, KINETIC ENERGY and TOTAL ENERGY > MAG > APPLY. This will plot the energy graph.
  • Energy graph
  • From the above plot, we see that at the strat the kinetic energy is about 85000kgmm2/ms2 and as the simulation progresses the kinetic energy at 80 ms is 46000kgmm2/ms2. This kinetic energy reduces and it is transformed into internal energy, hence the total energy is being constant at 85000kgmm2/ms2. There is very less contact energy and Hourglass energy deviation, which means the simulation is stable.

 

  • Go to NODE INTRUSION > DISP- RESULTANT DISPLACEMENT > APPLY. This will plot the intrusion graph.
  • intrusion graph
  • For node 66695, the distance between the node and the skew is 767mm and the resultant displacement is about 800mm. Hence, the intrusion is 840 - 767 = 73mm.
  • Similarly the intrusion for the node 66244 is 840 - 793 = 47mm.

 

  • Go to GLOBAL VARIABLES > RWALL > NORMAL RESULTANT, TANGENT AND TOTAL FORCES > APPLY. This will plot the rigid wall forces.
  • Rwall graph
  • From the above graph we can say that, the peak value of the total resultant forcce is about 130KN. There is variation between the tangent resultant force and hence the total resultant force curve is below the normal resultant force.

 

  • Go to SECTION > TOTAL RESULTANT FORCE > APPLY. This will plot the section forces.
  • A_pillar_left
  • The peak value at A_pillar_left is 1.9KN observed at the end.

 

  • A_pillar _right
  • The peak value at A_pillar_right is 0.0065KN, whivh is very much less than the left pillar.The force is high at the start and eventually reduces to an average force of 0.001KN.

 

  • A_pillar_left_hindge
  • The peak value at the A_pillar_left_hindge is 5.9KN at 40ms.

 

  • A_pillar_right_hindge
  • The peak value at A_pillar_right_hindge is 12KN at 73ms. The force at 34ms reduces to zero and then increases rapidly.

 

  • Fender_left
  • The peak value at left_fender is 15.5KN at 14ms. After 20 ms the force value shows very less variation and stays average.

 

  • Fender_right
  • The peak value at right_fender is 12KN at 12ms.

 

  • Rail_left
  • The peak value at left_rail is 13KN at 50ms.

 

  • Rail-right
  • The peak value at right_rail is 1.7KN at 27ms.

 

  • Shotgun_left
  • The peak value at left_shotgun is 6KN at 34ms.

 

  • Shotgun_right
  • The peak value at right_shotgun is 12.5KN at 9ms.

 

  • Go to ACCELEROMETER > RESULTANT ACCELERATION > APPLY. This will plot the acceleration graph.
  • Accelerometer graph
  • From this acceleration graph we can see that the acceleration at the left point is much greater than the acceleration at the right point. The value of the acceleration of left point at 1ms reaches upto 245mm/ms2, then it reduces largely. This is because the point pivots around the COG.

 

LEARNING OUTCOMES:

  • To define INIVEL for the model.
  • To define ACCELEROMETER for the model.
  • To adjust the mass balance to get the desired COG location.
  • To check for the COG location.
  • To create Moving Frames.
  • To create sections to obtain the results.
  • To use model checker for checking errors.
  • To provide the output results in the output blocks.

 

CONCLUSION:

  • Hence, by performing this project we conclude that during the crash analysis of the neon car model, the location of the COG acts as the bending point for deformation of the model in certain way. The energy error in the simulation is observed to be -1.8%, which is pretty fine for the simulation.

Leave a comment

Thanks for choosing to leave a comment. Please keep in mind that all the comments are moderated as per our comment policy, and your email will not be published for privacy reasons. Please leave a personal & meaningful conversation.

Please  login to add a comment

Other comments...

No comments yet!
Be the first to add a comment

Read more Projects by Shivaram Valagadri (7)

7. Side Pole Crash Simulation Using Hypermesh and Hypercrash

Objective:

AIM: To perform side pole crash analysis of the neon car model and obtain the simulation results and plot the required graphs. OBJECTIVES OF THE PROJECT: To set up the car model for side crash analysis. To create appropriate interface for the model. To check the model for intersections and penetrations. To create a rigid…

calendar

22 Jul 2021 07:13 AM IST

  • RADIOSS
Read more

6. Frontal Crash Simulation

Objective:

AIM: To perform frontal crash analysis of the neon car model and obtain the simulation results and plot the required graphs. OBJECTIVES OF THE PROJECT: To set up the car model for frontal crash analysis. To create appropriate interface for the model. To check the model for intersections and penetrations. To create a rigid…

calendar

20 Jul 2021 11:38 AM IST

  • RADIOSS
Read more

Assignment 5-RADIOSS Interfaces & Study of Effect of Notches Challenge

Objective:

AIM: To study the RADIOSS Interfaces and the effect of notches using Hypermesh, Hyperview and Hypergraph 2D. OBJECTIVES OF THE PROJECT: To create mesh for bumper assembly, mesh element size is 6mm. To apply and study the different cases for the crash tube model. To study the effect of notches on the crash tube. To plot…

calendar

08 Jul 2021 05:19 AM IST

  • MBD
  • RADIOSS
Read more

4. RADIOSS Material Laws

Objective:

AIM: To compare the results of the different material laws (i.e. Law2, Law27 and Law36) and their properties. OBJECTIVES: To assign different material laws and properties to the given component and to compare their results and present the inference. PROCEDURE: CASE 1: Go to FILE > IMPORT > SOLVER DECK > FAILURE_JOHNSON_0000.RAD…

calendar

15 Jun 2021 07:42 PM IST

  • RADIOSS
Read more

Schedule a counselling session

Please enter your name
Please enter a valid email
Please enter a valid number

Related Courses

coursecard

Crashworthiness Analysis using HyperMesh and Radioss

4.8

25 Hours of Content

Schedule a counselling session

Please enter your name
Please enter a valid email
Please enter a valid number

logo

Skill-Lync offers industry relevant advanced engineering courses for engineering students by partnering with industry experts.

https://d27yxarlh48w6q.cloudfront.net/web/v1/images/facebook.svghttps://d27yxarlh48w6q.cloudfront.net/web/v1/images/insta.svghttps://d27yxarlh48w6q.cloudfront.net/web/v1/images/twitter.svghttps://d27yxarlh48w6q.cloudfront.net/web/v1/images/youtube.svghttps://d27yxarlh48w6q.cloudfront.net/web/v1/images/linkedin.svg

Our Company

News & EventsBlogCareersGrievance RedressalSkill-Lync ReviewsTermsPrivacy PolicyBecome an Affiliate
map
EpowerX Learning Technologies Pvt Ltd.
4th Floor, BLOCK-B, Velachery - Tambaram Main Rd, Ram Nagar South, Madipakkam, Chennai, Tamil Nadu 600042.
mail
info@skill-lync.com
mail
ITgrievance@skill-lync.com

Top Individual Courses

Computational Combustion Using Python and CanteraIntroduction to Physical Modeling using SimscapeIntroduction to Structural Analysis using ANSYS WorkbenchIntroduction to Structural Analysis using ANSYS Workbench

Top PG Programs

Post Graduate Program in Hybrid Electric Vehicle Design and AnalysisPost Graduate Program in Computational Fluid DynamicsPost Graduate Program in CADPost Graduate Program in Electric Vehicle Design & Development

Skill-Lync Plus

Executive Program in Electric Vehicle Embedded SoftwareExecutive Program in Electric Vehicle DesignExecutive Program in Cybersecurity

Trending Blogs

Heat Transfer Principles in Energy-Efficient Refrigerators and Air Conditioners Advanced Modeling and Result Visualization in Simscape Exploring Simulink and Library Browser in Simscape Advanced Simulink Tools and Libraries in SimscapeExploring Simulink Basics in Simscape

© 2025 Skill-Lync Inc. All Rights Reserved.

              Do You Want To Showcase Your Technical Skills?
              Sign-Up for our projects.