# LIVERMORE SOFTWARE TECHNOLOGY CORP

LIVERMORE SOFTWARE TECHNOLOGY CORP Patent applications | ||

Patent application number | Title | Published |
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20140049534 | Efficient Method Of Rendering A Computerized Model To Be Displayed On A Computer Monitor - Efficient method of rendering a computerized model to be displayed on a computer monitor is disclosed. The computerized model contains a plurality of finite elements organized in groups with each group containing same type of finite elements. For achieving efficient rendering of the computerized model, first and second threshold numbers for further partitioning the computerized model are determined using a set of criteria based on available resources of the computer system and characteristics of the computerized model. Any group having the number of elements more than the first number is divided into subgroups. The number of elements in each subgroups is configured to contain no more than the second number. Both first and second numbers are “tune-able” for particular situations depending upon a number of factors including, but not limited to, power of computer processor, random access memory available, power of graphical co-processor and/or associated memory, and communication bandwidth. | 02-20-2014 |

20140019099 | Determination Of Failure In Sheet Metal Forming Simulation Using Isotropic Metal Failure Criteria - Systems and methods of determining structural failure in a computer simulation of manufacturing a sheet metal part are disclosed. A FEA model defined for a sheet metal manufacturing procedure includes a plurality of shell elements representing sheet metal blank. Shell elements are configured for emulating anisotropic material properties of the sheet metal. Numerically-simulated structural behaviors are obtained by conducting a computer simulation of manufacturing the sheet metal part using the FEA model with a metal forming simulation application module. The numerically-simulated structural behaviors include structural deformations in forms of equivalent strain and plastic flow direction during forming of the sheet metal part. A structural failure determination criterion is constructed using a planar isotropic material model of the sheet metal. Finally, the obtained structural behaviors are compared with the failure determination criterion to determine whether there is a structural failure in the computer simulation of manufacturing the sheet metal part. | 01-16-2014 |

20130325424 | Systems and Methods Of Creating Computerized Model For A Deep Draw Manufacturing Simulation Of A Sheet Metal Part - Systems and methods of creating a computerized model for a deep draw manufacturing simulation of a sheet metal part are disclosed. A series of computer generated visual diagrams are sequentially displayed upon receipt of a request from the user. The request is for creating a computerized model for a specific type of deep draw manufacturing simulation. The computerized model includes certain number of components for each particular type of simulations. The diagrams are configured for attracting the user's attention as to which component is being processed. Each diagram includes icons displayed in three different indicative schemes. The first indicative scheme shows components that have not been processed. The second indicative scheme shows a currently-processed component, while the third indicative scheme shows previously-processed components. The order of the series of diagrams is predetermined for each particular type of simulation hence minimizing human error in creation of the computerized model. | 12-05-2013 |

20130325423 | Trim Line Determination In A Deep Draw Manufacturing of A Sheet Metal Part - Methods and systems of determining a trim line in deep draw manufacturing of a sheet metal part are disclosed. A computerized model of a sheet metal part and the addendum surface geometry are defined. At least one flange portion in the computerized model is identified. Perform a numerical simulation of unfolding of the flange towards the addendum surface by applying a first set of numerical loads to each pair of adjacent finite elements. The first set of numerical loads is configured for flattening out the pair of finite elements with a bending moment determined using relative orientations of the pair finite elements and material properties of the part. A second set of numerical loads is applied to close any remaining gap between the unfolded flange and the addendum thereafter. The outer edge of the flange portions in their final unfolded configuration is designated as a trim line. | 12-05-2013 |

20130325417 | Numerical Simulation Of A Structure Having A Heat-Affected Zone Using A Finite Element Analysis Model - Methods and systems for conducting numerical simulation of a structure having HAZ using a FEA model are disclosed. A FEA model includes at least a group of finite elements representing a welded structural part that encompasses at least one HAZ is defined and received in a computer system. Each finite element in the group is configured with at least one integration point according to FEA. The group of finite elements is associated with a set of HAZ material properties representing structural behavior of the welded structural part inside and outside the HAZ. Corresponding material properties are then determined and assigned to each integration point by interpolating the associated set using the shortest heat-propagation distance between each integration point and the heat source locations (e.g., spotwelds' centroid) with an automated procedure that requires no additional input after the HAZ material properties have been defined. | 12-05-2013 |

20130289957 | Methods For Providing A Bonded-Particle Model In Computer Aided Engineering System - Systems and methods of providing bonded-particle model amongst a plurality of discrete particles representing a physical domain made of brittle material in a time-marching simulation to obtain numerically simulated continuum physical phenomena are disclosed. A physical domain is represented by a plurality of discrete particles. A domain of influence is assigned to each discrete particle and a bonded-particle model is created for the discrete particles. Respective bonds are established to connect each discrete particle to all other discrete particles within its domain of influence. The bonded-particle model further defines a rule for breakage of a bond. Continuum physical phenomena of the physical domain are numerically represented through a set of formula such that a time-marching simulation of the physical domain can be conducted. Physical properties include material properties and fracture energy release rate. Finally, the bonded-particle model allows size and orientation changes of each discrete particle. | 10-31-2013 |

20130275090 | Methods and Systems For Creating a Computerized Model Containing Polydisperse Spherical Particles Packed In An Arbitrarily-Shaped Volume - Systems and methods for creating a computerized model containing polydisperse spherical particles packed in an arbitrarily-shaped volume are disclosed. To create the computerized model, a plurality of polydisperse spherical particles having statistical properties according the characteristic profile (e.g., minimum and maximum sizes and size distribution) is generated. First portion of the particles is used for forming a border layer within the volume's boundary. Any hole in the border layer is sealed with one or more null-sized particles. Second portion of the particles is used for filling up an interior space in a layer-to-layer scheme from the border layer inwards. The layer-to-layer scheme includes searching a best suitable location from a list of size-ranked candidate locations using power diagrams. Each of the second portion of the particles is allowed to pass through holes in the current layer towards the border layer when possible. | 10-17-2013 |

20130211796 | Element Refinement Methods and Systems in Arbitrary Lagrangian-Eulerian (ALE) Based Finite Element Analysis - Systems and methods for refining ALE elements in a time-marching simulation are disclosed. A FEA model representing a physical domain is defined and used in a time-marching simulation that simulates physical phenomena of the physical domain. Certain ones of the ALE elements are refined upon detecting a user-defined triggering condition. Each of said certain ones of the ALE elements is refined into a number of child elements. When an ALE element contains more than one material, volume fractions representing respective materials are calculated in each of the child elements right after each refinement. At each advection phase, each donor maps its flux to one or more receptors. When a donor maps its flux to multiple receptors, each receptor calculates its own share of the flux from the donor. When the donor contains more than one material, each receptor must account for such situation. | 08-15-2013 |

20130185041 | MULTI-OBJECTIVE ENGINEERING DESIGN OPTIMIZATION USING SEQUENTIAL ADAPTIVE SAMPLING IN THE PARETO OPTIMAL REGION - Systems and methods of selecting sampling points (product designs) in a multi-objective engineering design optimization of a product are disclosed. The method comprises (a) receiving a description of the product to be optimized, (b) selecting an initial set of sampling points in a design variable space of the product, (c) obtaining numerically-simulated structural responses of each of the current set, (d) deriving a set of approximate POPs from optimization using metamodels constructed from numerically-simulated structural responses, (e) establishing subregions around POF kernels that are selected from approximate POPs using “Piercing” procedure, (f) creating a set of Diversity Basis Points by populating the subregions with a space filling criterion, (g) selecting another set of sampling points from a combined group of the Diversity Basis Points and POF kernels using “Piercing” procedure, (h) reducing the subregion size, and (i) repeating (c)-(h) until a termination condition has been reached. | 07-18-2013 |

20120323536 | Methods and systems for applying mass scaling in finite element analysis - Methods and systems for applying mass scaling in finite element analysis is described. Elements with a critical time step smaller than a user desired time step are identified. Out of these elements, elements located in a particular region requiring realistic simulated dynamic responses are processed with selective mass scaling and the rest are processed with regular mass scaling. Selective mass scaling requires more computation but can better preserve dynamic structural characteristics. The aforementioned method is referred to as a mixed mode mass scaling. Mixed mode mass scaling allows engineering simulation to be conducted within a reasonable turnaround time, because only a portion of the FEA model is subjected to more computation intensive selective mass scaling. Selective mass scaling technique includes reducing effects caused in three translational and three rotational rigid body modes of shell element. | 12-20-2012 |

20120215498 | NUMERICALLY-SIMULATED RIGID BODY CREATION MEHTODS AND SYSTEMS THEREOF - Methods and systems for creating numerically-simulated rigid bodies in finite element analysis are disclosed. At least one rigid finite element in a finite element model is designated for forming one or more numerically-simulated rigid bodies (RBs). Each numerically-simulated RB comprises an arbitrary number of rigid finite elements connecting to one another in an arbitrary shape. Each numerically-simulated RB is created by locating all of the elements embedded in the FEA model through shared node or nodes. A procedure of using element definition as a guide to set up an array of node flags, each node flag for one node such that all numerically-simulated RBs defined in the model can be located efficiently. Once all numerically-simulated RBs have been located, each unique numerically-simulated RB is defined as a unique linked-list of connected rigid finite elements. | 08-23-2012 |