Matra Datavision Research Articles

25 Years Ago September 1996

The value of White Papers; strong growth for Matra Datavision; 824 Haeger press for metal fabrication launched in the UK; Interest in high speed machining at unprecedented levels; and growing order book for Webster & Bennett

3D geometric modelling of an external orogenic domain: a case history from the western Alps (massif de Morges, Pelvoux)

Abstract Describing the 3D geometry of geological surfaces is a fundamental step to infer their structural history, especially when they have recorded successive deformation phases. This study aims at testing the contribution of 3D modelling to the understanding of orogenic domains. It focuses on the cover/basement contact of an External Crystalline Massif of the French Alps considered as a marker of the finite deformation at orogen scale. This contact is observable in outliers of Mesozoic cover in the test area located in the Massif de Morges (Pelvoux Massif). A 3D geometric model has been built from map and cross-section data derived from field structural and kinematic observations using STRIM software (Matra Datavision). 3D modelling ensures geometric consistency of geological interpretation. Moreover, the model has been unfolded to restore surfaces and to quantify shortening. Together with field analyses, those results show that two sub-perpendicular phases of deformation related to the Alpine cycle have occurred. The first and main one consisted of the NNE-SSW inversion of previous extensional paleo-faults that controlled the geometry of the Tethyan margin. The second one was an E-W compression of post-Early Oligocene age.

EADS Matra Datavision announces the creation of the Open CASCADE Company

EADS Matra Datavision announces the creation of the Open CASCADE Company

EADS Matra Datavision to expand training programmes

EADS Matra Datavision to expand training programmes

European Helpdesk launched by EADS Matra Datavision

European Helpdesk launched by EADS Matra Datavision

Cadomian tectonics in northern Brittany: a contribution of 3-D crustal-scale modelling

Both available and newly acquired geological and geophysical data processed in the framework of the ARMOR project have been used to construct a 3-D geometric and geological model of the Cadomian domain of northern Brittany. The major results of the data processing are presented and discussed relative to a composite profile transecting the studied domain and constructed from the surface geology, reflection seismics, magnetotelluric soundings and gravimetric data. They are then extrapolated at regional scale through a series of cross-sections compiled from the surface geology and gravimetric data and calibrated onto the composite profile. The 3-D crustal-scale models were computed according to two procedures. The first, using a STRIM Matra Datavision modeler, defines various interfaces through correlation between adjacent cross-sections and is well adapted to the 3-D representation of geological structures. The second, based on Voronoı̈ diagrams, leads to a volumetric model of the geological units and is a powerful tool for calculating 3-D geophysical responses of the model when the physical properties of the rock units are known. The tectonic implications of the computed 3-D crustal-scale geometry of the Cadomian domain are then discussed in terms of volcanic-arc thrusting, with special emphasis being placed on the obliquity of the shortening direction by reference to the thrust fault trend. Finally, the data are used to demonstrate the reactivation of some Cadomian faults during the deposition of Ordovician sandstones and following the emplacement of the Paleozoic dolerite dyke swarm of northern Brittany.

Matra Datavision appoints sales director

Matra Datavision appoints sales director

Matra Datavision and Mitutoyo join forces to develop new generation inspection software

Matra Datavision and Mitutoyo join forces to develop new generation inspection software

Matra Datavision joins Europe's No. 1

Matra Datavision joins Europe's No. 1

CADCAM Linked to the Shop Floor

ON the shop floor at Dowty Fuel Systems' Cheltenham factory, multi‐axis CNC (computer numerically controlled) machine tools produce the main bodies of the digital engine control system for Pratt & Whitney's PW305 engine. These advanced machines are now controlled directly from the Matra Datavision EUCLID‐IS CADCAM system, following a major advance towards computer integrated manufacture.

NASA Stress Analysis Software from Matra Datavision

A new finite element analysis (FEA) package has been added by Matra Datavision to its ‘EUCLID‐IS’ suite of computer‐aided engineering software.

The CAD∗I interface for solid model exchange

While standards for the exchange of wireframe and surface models have been in use in industry for a couple of years, there so far exists no such standard for solid model exchange. The present paper gives a short overview of some concepts that have been recently developed for the exchange of solid models. The solids interface developed in the ESPRIT Project No. 322 CAD-Interfaces (CAD∗I) is described in some detail. The development of prototype processors for the Matra Datavision EUCLID system and first test parts are presented. Finally, the influence of the CAD∗I project on the development of the international standard STEP is outlined.