Wrinkling of a contoured composite laminate part during forming to contour is reduced by using laminate plies having off-angle reinforcing fibers that provide the part with primary axial strength along a major axis of loading.

A forming tool stamps sheet metal blanks into a desired shape. A contoured surface is defined for the forming tool so that respective portions of the metal blank flow over the contoured surface during forming. An intrinsic material flow pattern resulting from the contoured surface is compared to a desired flow in order to identify regions of the contoured surface having an insufficient flow that creates areas in the formed metal blank receiving less than a desired amount of metal. A surface microtexture is applied onto the contoured surface in a pattern selected to increase metal flow along the identified regions by providing a coefficient of friction in the identified regions that is reduced relative to adjacent regions of the contoured surface.

A method of evaluating a hot stamped part manufactured by hot stamping a coated steel sheet having a Zn—Ni coating layer on a surface of a base steel sheet includes an analysis model setting step, a forming condition setting step, a forming analysis step, and an evaluation step which are performed using a computer, wherein in the evaluation step, a maximum micro-crack depth in the hot stamped part manufactured under a forming condition set in the forming condition setting step is evaluated using a correlation, obtained beforehand, between an equivalent plastic strain in a surface layer of the hot stamped part and the maximum micro-crack depth in the hot stamped part.

Systems and methods for semi-discrete modeling of progressive damage and failure in composite laminate materials are disclosed. An example method includes receiving, from a user, a fibrous strip width and a fibrous strip spacing, and creating a finite-element (FE) mesh by: generating, using a structured hex meshing algorithm, a plurality of fibrous strips along a fiber direction based on the fibrous strip width and the fibrous strip spacing, and generating, using a free hex-dominated advancing front meshing algorithm, a bulk element between each of the plurality of fibrous strips. The FE mesh may define a portion of a composite laminate material. The example method includes determining a predicted mechanical response of the composite laminate material by: generating a constitutive model corresponding to the composite laminate material based on the FE mesh, and inputting a stress value or a strain value to the constitutive model to generate the predicted mechanical response.

Apparatus and method is provided for simulating behavior of a flexible medium for a plurality of times under different conditions. A component inside the conveyance path is displayed together with a plurality of locations in which abnormal behavior of the flexible medium has occurred based on a result of the simulation.

The present application automatically creates a press die shape corresponding to various kinds of pressing methods and product shapes using a part processing method data relating to press forming of ordinary parts. It includes a data storing device which stores a data relating to a shape of a part; a pressing method for press forming the part; a pressing direction setting and a press die shape type, with respect to each part; a part processing obtaining device which obtains a data relating to the pressing method of a referencing part, the pressing direction setting and the press die shape type; and a creation device which creates the press die shape data relating to a shape of a product portion and a peripheral portion thereof in the press die, and the pressing method, the pressing direction setting and the press die shape type of the referencing part.

Embodiments of the present disclosure provide a method and a system for optimizing metal stamping process parameters, thereby performing die parameters optimization and stamping forming curve optimization to achieve various design goals. Embodiments of the present disclosure automatically model the die parameters and stamping forming curves, and import them into an optimization process. Embodiments of the present disclosure use a response surface method to fit a linear polynomial function, and then perform optimization on a response surface to obtain a best die parameters values combination and a best stamping forming curve.

A 3-D mesh model represents 3-D geometry of a product/part manufactured with deep draw metal forming process. The 3-D model contains nodes connected by shell finite elements. 3-D model is modified by converting each quadrilateral shell finite element to triangular shell finite elements. Respective averaged nodal curvatures of all nodes of the 3-D model is calculated based on the 3-D geometry. A 2-D mesh model is created by unfolding the 3-D model to a plane while maintaining all corresponding triangular shell finite elements between the 2-D and the 3-D models as similar triangles. An estimated pre-stamped shape of a workpiece used for manufacturing the product/part is obtained by iteratively updating the 2-D model with a set of internal nodal forces with respect to the 3-D model and with a set of nodal force adjustments based on the respective averaged nodal curvatures.

The present invention is a computer implemented method of design a roof, the method comprising: mapping, a roof layout of a structure; identifying, a set of features of the roof layout, wherein the set of features identifies the slope and intersection of the surfaces of the roof layout; applying, a plurality of trusses over the roof layout in a predetermined orientation; generating, a profile of each of the plurality of trusses, wherein the profile is generated through the combination of the identified set of features of the roof layout and the orientation of the trusses; calculating, a weight of the roof layout based on the total weight of the trusses; and calculating, a difficulty rating of the roof layout.

The invention relates to the technical field of vehicle design, and aims to solve the problem that an existing vehicle body design method is likely to cause a high scrap rate of a stamped part constituting a vehicle body in a manufacturing process. To this end, the invention provides a method for improving the design of a vehicle-body stamped part, the method including: obtaining thinned portions with thinning rates exceeding a standard rate on a stamped part that has been formed; screening a first portion with a defect rate and/or a defect type not meeting a preset requirement from the thinned portions; and adjusting a shape, a size, and/or a material of a second portion that is the same as the first portion on an original design model of the stamped part to obtain a target design model. In a process of improving the design of vehicle body styling, the improvement is made based on an original design model of a previous version of vehicle-body stamped part and actual information of the previous version of vehicle-body stamped part after mass production, and this can not only ensure a fast research and development speed, but also avoid a high scrap rate of a newly designed vehicle-body stamped part in a manufacturing phase, thereby greatly reducing research and development and manufacturing costs.