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Viewing 1 to 30 of 3012
Training / Education
2015-02-17
Today's transportation industries are facing multi-disciplinary challenges. The product design and development process challenges often contradict each other, for example cost, weight, quality and performance. A central challenge is the need for cost and mass reduction to compete in the global market, while continuing to meet all new and existing requirements for quality and performance. Accelerated Concept to Product (ACP) Process is a performance-driven, holistic, product design development method intended to create a balance between structure and strength, synchronizing the individual facets of the product development process. It takes advantage of design, material and manufacturing experience using multiple CAD, CAE and CAO tools to reduce product design and development time and costs, as well as to reduce product mass and improve product performance. This three-session web seminar will offer information on how to design a concept model from a clean sheet using a holistic 3G design approach (ACP-3G), where material types and its properties (Grades and Gauges), Geometry (shape), and manufacturing process can work together for the optimum weight and performance.
Training / Education
2015-01-21
Today's transportation industries are facing multi-disciplinary challenges. The product design and development process challenges often contradict each other, for example cost, weight, quality and performance. A central challenge is the need for cost and mass reduction to compete in the global market, while continuing to meet all new and existing requirements for quality and performance. Accelerated Concept to Product (ACP) Process is a performance-driven, holistic, product design development method intended to create a balance between structure and strength, synchronizing the individual facets of the product development process. It takes advantage of design, material and manufacturing experience using multiple CAD, CAE and CAO tools to reduce product design and development time and costs, as well as to reduce product mass and improve product performance. This two-session web seminar will offer information for those who would like to start with the design of initial product structure from a general design space, a shape, or ideas available, or knowledge of design space and constraints.
Training / Education
2014-12-04
Car companies and suppliers continue to develop new technologies that make vehicles safer and regulatory agencies continue to update safety regulations based on new research studies, making vehicle safety design more and more complex. This seminar covers the mechanics of frontal crashes and how vehicle structures, vehicle restraint systems, and vehicle interiors affect occupant safety. It also describes details of how CAE tools work in the simulation of frontal crashes. The goal of the course is to familiarize participants with engineering principles behind vehicle and restraint designs for occupant safety. Accident crash statistics, biomechanics, government regulations and public domain frontal safety tests will be reviewed briefly. Students will also be exposed to Madymo, one of the major occupant CAE tools. The basic inner workings of the tool, such as rigid body dynamics, joints, contact, airbag and seatbelt modeling, and modeling techniques will be shared with the class. The class also offers participants opportunities to do hands-on computer analysis as well as simplified hands-on crash tests, where students can learn first-hand how vehicle pulses and restraint design affect occupant response.
Training / Education
2014-10-29
This interactive seminar will take you beyond the basics of passenger car and light truck vehicle dynamics by applying advanced theory, physical tests and CAE to the assessment of ride, braking, steering and handling performance. Governing state-space equations with transfer functions for primary ride and open loop handling will be developed & analyzed. Building on the analysis of the state space equations, common physical tests and their corresponding CAE solutions for steady state and transient vehicle events will be presented. The "state-of-the-art" of vehicle dynamics CAE will be discussed. Common lab and vehicle tests and corresponding metrics used to assess chassis system and vehicle performance will be discussed in great detail. Hands-on workshops using CARSIMTM vehicle dynamics simulation software will help reinforce the material. Significant time will also be dedicated to the use of design of experiments (DOE) as a tool to assist in the analysis and optimization of chassis systems for multiple vehicle responses.
Training / Education
2014-10-09
Side impact crashes account for approximately twenty-six percent of all motor vehicle fatal crashes, second only to frontal crashes, according to a report by the National Highway Transportation and Safety Administration (NHTSA). While car companies and suppliers continue to develop new technologies that make vehicles safer, NHTSA rolled out updated safety regulations (FMVSS 214) based on new research studies, making vehicle safety design more and more complex. This seminar is designed to familiarize participants with the engineering principles behind vehicle and restraint designs for occupant safety. Students will learn the mechanics of side crashes and how vehicle structures, restraint systems, and interiors affect occupant safety. Students will also be exposed to system, subsystem and component level CAE and testing tools used in the simulation of side impacts. Accident crash statistics, biomechanics, government regulations and public domain frontal safety tests will also be covered.
Event
2014-10-07
The CAE has been extensively used to reduce the product development time as well as prevent the field issues such as the brake noise and vibration. This session presents the latest in the computer-aided engineering technologies in the various areas including but not limited to NVH, CFD, thermal, structural, and wear analysis.
Event
2014-10-07
The CAE has been extensively used to reduce the product development time as well as prevent the field issues such as the brake noise and vibration. This session presents the latest in the computer-aided engineering technologies in the various areas including but not limited to NVH, CFD, thermal, structural, and wear analysis.
Technical Paper
2014-09-28
Sukumar T, Murugan Subramanian
In commercial vehicle air braking system, Quadruple System Protection Valve (QSPV) is used to distribute the air from air processing unit to front axle, rear axle pneumatic brake circuits, parking brake circuits and to the auxiliary applications like suspension system, door operating system, clutch operation. The valve should meet the regulatory compliance as per IS 11852 norms. The Piston assembly used in Quadruple System Protection Valve (QSPV) is made of plastic material which consist of piston and retainer. The Piston is made up of PBT 30% GF and the retainer is made up of Nylon 6 30% GF material. Both material having different material properties in terms of flexural modulus and density. The piston is assembled with retainer by means snap fit mechanism to achieve the Flexibility in integral locking feature. The snap-fit is a mechanical joint system where part-to-part attachment is accomplished with locating and locking features (constraint features) that are homogenous with one or the other of the components being joined.
Technical Paper
2014-09-28
Adarsh Venkata Padmanabhan, Hariram Ravichandran, Lokendra Pavan Kumar Pappala, Shreyas Shenoy
This paper will comprise obtaining friction coefficient (µ) measure by extracting surface and texture information using sensors during brake interventions. A primary estimate of friction coefficient will be obtained using wheel signals. Surface texture estimation and secondary friction coefficient estimate will be obtained using acoustic signals. The estimates will be compared and combined to obtain a more accurate measure of friction coefficient. Finally, a suitable interpolation technique is used to obtain a µ-grid around the vehicle. The obtained µ-grid can be extrapolated with the help of camera information. The grid is graphically realized with the aid of visualization techniques. This type of surface characterization usually enables brake distance optimization and effective countermeasures pertaining to a standard ESP system. Keywords: Friction Coefficient Estimation, Acoustic Information Extraction, Active Safety.
Technical Paper
2014-09-28
Mithun Selvaraj, Suresh Gayakwad Sr, Anand kumar S
The highest goal for a good brake system design must be that the vehicle when braking obtains a shorter stopping distance, does not leave the track and remains steerable. From the perspective of road traffic , safety and for avoidance of accidents the time and location of a vehicle coming to halt after braking are crucial. In heavy commercial vehicle having longer wheel base, pneumatic brake system is being used .The pneumatic brake system configuration has to be designed in such a way that the response time should meet the safety regulation standards and thereby achieve shorter stopping distance and vehicle stability. Validating the effectiveness of pneumatic brake system layout experimentally on stopping distance and vehicle stability is expensive. This paper deals the modeling of a typical heavy commercial vehicle along with the entire pneumatic brake system layout with actuating valves, control valves and foundation brakes to predict the dynamic behavior and stopping distance. The modeling and simulation was carried out using AMESim , a commercially available multi-domain physical modeling software employing bond graph technique and lumped system.
Technical Paper
2014-09-28
Lijun Zhang, Cheng Ruan, Dejian Meng
Paper Title: The Influence of Vacuum Booster Design Parameters on Brake Pedal Feel Key words: brake pedal feel; bench test; vacuum booster parameter; forward design Research and/or Engineering Questions/Objective As one of the most important characteristics of the brake system, brake pedal feel is determined by the structural and kinetic parameters of the components of the brake system. With the improvement of consumer demands for braking reliability and comfort, brake pedal feel caught the attention of the manufacturers. Vacuum booster is the servo power component of the brake system, whose parameters have a direct influence on the brake pedal feel characteristics. This study could contribute to the guide of vacuum booster forward design and brake pedal feel characteristics prediction. Methodology A dynamic model of the complete brake system which has a full mathematical description and contains the structure parameters is established in the Matlab/Simulink software, considering the input velocity characteristics.
Technical Paper
2014-09-28
Juan Carlos Martinez Laurent, Adrian Jordan, Francisco Canales
The brake system and components are essential security systems for users of motor vehicles; because of this their fundamentals and operation have been developed, researched and studied during history of the automotive industry. Throughout the evolution of braking, security and prevention systems such as ABS, EBA, ECS and TCS have granted and assured greater security and better driving experience to users, however a common NVH phenomenon known as “Brake Judder” creates a perception of poor braking system performance, resulting in customer complaints and warranty claims. This phenomenon occurs mainly as a vibration in the brake pedal, steering wheel or seat rails, perceived by the driver when applying the brakes. This vibration does not deteriorate the braking distance or the vehicle performance, but it is a concern for the customer who identifies any non-desired vibration as a potential performance loss. The principal’s causes of this phenomenon are the Disc Thickness Variation (DTV) caused by an uneven braking, and the Disc Thermal Distortion or Coning, caused by an aggressive braking cycle.
Technical Paper
2014-09-28
Bongkeun Choi
In this paper new technology of virtual thermal test of disc brake with several advanced analytic techniques was presented. With the virtual thermal test, thermal performance of brake system could be easily evaluated without any possibility of great errors that used to happen in the earlier analyses. In addition to the classical result of temperature, this virtual thermal test produced several valuable applications such as optimization of thermal performance of brake and estimation of braking distance.
Event
2014-09-24
This session deals with the manufacture of detail parts through laser sintering, stereo lithography, fused deposition modeling, and other emerging technologies. The session will explore technologies and methods for producing net or near net parts in various resins, plastics and metals directly from a CAD model that could employ design architectures that couldn't be achieved by other manufacturing methods.
WIP Standard
2014-06-30
This SAE Recommended Practice describes how to position and posture the H-point design tool (HPD) described in Appendix B, and how to establish the seating reference point (SgRP), design H-point travel path, and other key reference points that are used in the design and specification of both driver and passenger seat positions. This practice also provides a method for determining the length of the seat track for a driver seat that adjusts fore/aft. The seat track length is based on a desired level of driver accommodation, assuming a U.S. population containing an equal number of male and female drivers. The procedure can be used to establish driver seat track accommodation for new vehicle designs or to evaluate accommodation in existing vehicles. A general method for determining driver seat track length for any driver population (male and female stature distribution) at any selected accommodation percentile and gender mix is given in Appendix A. Application of this document is limited to Class A Vehicles (Passenger Cars, Multipurpose Passenger Vehicles, and Light Trucks) as defined in SAE J1100.
WIP Standard
2014-06-27
This document provides dimension definitions that facilitate geometric quantification and evaluation of seats. This document has been designed for use in CAD, however, many dimensions require establishing HPM position and attitude. Refer to the appropriate document for these procedures. These dimensions are package independent in that they do not require use of the HPM-ll supplemental thigh/leg/shoe. Three types of seat geometry reference points and measurements have been developed. 1. Simple reference points and measurements not related to H-point 2. H-point dependent reference points and measurement that utilize the seat characterization capabilities of the HPM to quantify seat measurements 3. Cross sectional seat trim outlines For convenience and simplicity, many terms associated with H-point devices use human body parts in their name. However, they should not be construed as measures that indicate interaction with any or all occupants concerning accommodation, human capabilities, or comfort.
WIP Standard
2014-06-16
This recommended practice is a source of information for body and trim engineers and represents existing technology in the field of on-highway vehicle seating systems. It provides a more uniform system of nomenclature, definitions of functional requirements, and testing methods of various material components of motor vehicle seating systems.
Technical Paper
2014-04-28
Saurabh Shaha, Kedar Hendre
Abstract Progress in material research is the driving force behind innovative ideas and characterising the newly invented material accurately is need of the hour. Increased use of polymers in automobile industry has led to the need for accurately capturing polymer material properties. In case of polymers, we generally observe negative slope in true stress strain curves due to inherent material behaviour. It is mainly because of polymer chains which realign/untangle in the direction of load. This is a challenge when we characterise polymers material properties to be used in LS_DYNA software, which is widely used in automotive applications to solve dynamic crash events. This software does not allow negative slope in stress strain curves in the plastic region and that causes model instabilities. This paper explains the methodology to avoid negative slope and still characterise the polymers without significantly loosing on the accuracy and correlation to physical tests. *MAT24 (PIECEWISE LINEAR ELASTICITY) is the most common and simple material model used to represent the polymer in LS DYNA.
Event
2014-04-10
Key words: CAE, coupling, multi-discipline interaction Papers should discuss the simulation methods for the coupled effects of various physical phenomena, including (not limited to) the following methods: • Sequential coupling/de-coupling of multi-discipline CAE methods • Direct/Parallel coupling/de-coupling of multi-discipline CAE methods
Event
2014-04-10
The presentations in this session focus on technologies related to modeling and analysis, quality assurance, as well as utilization for rapid prototying, robost tolerance designs, structural crash performance of a compact car through CAE, accurate analytical solutions of resilience for high-modulus elastic-plastic material, testing, transfer path analysis, NVH, vehicle development, wheel input forces and brake design.
Viewing 1 to 30 of 3012

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