Crack Udec Itasca
UDEC is different from conventional numerical programs in the way the model geometry is created. A single block is created first, with a size that encompasses the physical region being analyzed. Then, this block is cut into smaller blocks whose boundaries represent both geologic features and engineered structures in the model. This cutting process is termed collectively as joint generation; however, “joints” represent both physically real geologic structures and boundaries of artificial structures or materials that will be removed or changed during the subsequent stages of the UDEC analysis. In this latter case, the joints are fictitious entities (i.e., construction joints) and their presence should not influence model results.
BlocksThe initial block(s) can be defined as a simple rectangular box or circular domain, using a reference image (.dxf,.png,.jpg,.gif), as a table of coordinates or importing a formatted ASCII data file of UDEC blocks (.dat). Blocks can be subsequently edited to move, insert or delete points interactively or a table of point coordinates. JointsJoints or discontinuities can be defined in UDEC with commands, FISH functions or interactively using the graphical user interface via:. Individual cracks;.
Basic shapes (e.g., circle, arc, line, box, etc.);. Tables of two-dimensional coordinates;.
Statistical joint-set generator; and. Voronoi tessellation generator.In addition, any joint can be welded (joined) together to create construction joints while minimizing their effects on the model behavior. These cracks are normally used to define excavation boundaries and to provide zone density control. Statistical Joint-Set GeneratorThe joint generator in UDEC define a joint-set in terms of its angle (CCW from the x-axis), gap length, spacing, trace length and origin. In addition to a mean value, the maximum random deviation from the mean (for uniform probability distribution) can be specified.
Joint generation can be limited to selected portions of the model by defining a limiting range. Blocks may also be hidden (and later shown) to remove them from a joint generation stage.Discontinuous joints can be generated by specifying the mean gap between each joint segment and their trace length.
By default, all joint segments terminating within a block will be deleted once the blocks are zoned or model calculations begin. However, it is possible to simulate this scenario by creating continuous joints and defining joint properties and intact rock properties intermittently along their length. Voronoi Tessellation GeneratorVoronoi tessellation creates randomly sized polygonal or triangular blocks. One or more blocks in a UDEC model can be subdivided into Voronoi sub-blocks of arbitrary size. This joint generator is useful to simulate crack propagation; “fracturing” occurs when the joint strength between Voronoi blocks is exceeded. Such a model is often referred to as a UDEC -DM (damage model) and used to simulate intact rock undergoing micro-damage.The Voronoi algorithm begins by distributing points randomly within the tessellation region. The interior points are then allowed to move.
Crack Udec Itasca Il
Crack Udec Itasca Il
An iteration procedure moves the points; the higher the number of iterations, the more uniform the spacing between points will be. Next, triangles are created between all points. Finally, the Voronoi polygons are created by constructing perpendicular bisectors of all triangles that share a common side. The polygons are truncated at the boundaries of the tessellation region. ZonesA model may contain both rigid and deformable blocks at the same time. Blocks are rigid by default, but can be made deformable by discretized them automatically or manually into triangular finite-difference zones.
Zone generation can be accomplished using the following.TRIANGULAR MESH - Automatic generation of zones for an arbitrarily shaped block.QUADRILATERAL MESH - Automatic generation of diagonally opposed triangular zones to improve plastic flow calculation. This form of zoning will not work for all block shapes; blocks must contain 4 or 5 corners.MIXED MESH - Subdivides existing triangular zones into 3 subzones with an overlay of 4 zones (12 total) to improve plastic flow calculation. The strain of these zones is averaged to avoid hourglass effects.SINGLE MESH - Mixed mesh, but only with a single layer of zones (i.e., no overlay).MANUAL MESHING - For manual generation, a list of gridpoints and zones must be specified.
Manual generation must be performed for each individual block. This policy applies to the site (hereinafter the 'Site'). (1) Website Cookies Utilized by ITASCA DENVERA cookie is a small text file in alphanumeric format deposited on thehard disk of the user by the server of the Site visited or by a thirdparty server (advertising network, web analytics service, etc.). Whenyou log on to our Site, we may install various cookies on your device.The cookies we issue are:. cookies necessary for your navigation;. cookies allowing statistics to be made;. cookies analyzing your browsing.In accordance with the regulations, cookies are kept for 13 months.
(2) Cookies Issued Due to Third-party Applications Integrated on Our SiteBy browsing our site, you can click on the 'social networks' buttons to consult our LinkedIn profile and our YouTube page. By clicking on the icon corresponding to the social network, the latter is likely to identify you. If you are connected to the social network during your navigation onour Site, the sharing buttons allow you to link the contents consultedto your user account. Google, through Google Analytics, places cookies and tracks the site's audience. We can not control the process used by third-party applications to collect information about your browsing on our Site.
Itasca Udec Crack
Weinvite you to consult their policy of protection of personal data toknow their purpose of use and the navigation information they cancollect. (3) The Management of CookiesWhen you visit our Site for the first time, a cookies bannerwill appear indicating the purposes of the cookies. Please note thatfurther navigation on the Site is equivalent to giving your consent tothe use of cookies by ITASCA DENVER.
You can choose at anytime to adapt the management of cookies according to your preferences,disable them or express a different choice via the means describedbelow.
All commands are reformulated in UDEC 7 (GUI and GIIC) to follow a syntactical pattern of NOUN - VERB - OPTION - MODIFIERS - RANGE.Commands are more explicit and more intuitive. They are easier to learnand apply, and are consistent in usage with other Itasca numericalmodeling codes.For example,UDEC 6.0 Syntax: block 0,0 0,10 10,10 10,0UDEC 7.0 Syntax: block create polygon 0,0 0,10 10,10 10,0As always, commands can be truncated, so the UDEC 7 command b cr p 0,0 0,10 10,10 10,0 also works. A comparison is shown below for a complete model using both UDEC 6 (top) and UDEC 7 (bottom) syntax.In recognition that this major change will require relearning commands and rewriting older data files for compatibility with version 7, additional HELP support has been added and a built-in conversion tool is available. The tool automatically converts a specified UDEC 6 data file to the new UDEC 7 command syntax. In the event that something is unclear and cannot be automatically converted, it is highlighted for user review.
However, the conversion success rate is high and most data files are converted with no flagging whatsoever. When an older data file is updated with the conversion tool, a backup copy of the original data file is automatically retained. This policy applies to the site (hereinafter the 'Site'). (1) Website Cookies Utilized by ITASCA CANADAA cookie is a small text file in alphanumeric format deposited on thehard disk of the user by the server of the Site visited or by a thirdparty server (advertising network, web analytics service, etc.). Whenyou log on to our Site, we may install various cookies on your device.The cookies we issue are:. cookies necessary for your navigation;. cookies allowing statistics to be made;.
cookies analyzing your browsing.In accordance with the regulations, cookies are kept for 13 months. (2) Cookies Issued Due to Third-party Applications Integrated on Our SiteBy browsing our site, you can click on the 'social networks' buttons to consult our LinkedIn profile and our YouTube page. By clicking on the icon corresponding to the social network, the latter is likely to identify you. If you are connected to the social network during your navigation onour Site, the sharing buttons allow you to link the contents consultedto your user account.
Google, through Google Analytics, places cookies and tracks the site's audience. We can not control the process used by third-party applications to collect information about your browsing on our Site. Weinvite you to consult their policy of protection of personal data toknow their purpose of use and the navigation information they cancollect. (3) The Management of CookiesWhen you visit our Site for the first time, a cookies bannerwill appear indicating the purposes of the cookies. Please note thatfurther navigation on the Site is equivalent to giving your consent tothe use of cookies by ITASCA CANADA. You can choose at anytime to adapt the management of cookies according to your preferences,disable them or express a different choice via the means describedbelow.