Provided is a sheet material press forming method of press forming a formed part including a top portion with a protrusion having a blockage protrusive shape, the method including: preforming a high-strength steel sheet; and then forming it into a target shape without fractures or wrinkles, which is achieved by determining a shape in the preforming by press forming analysis according to the following steps: S1: the region of the protrusion having the target shape is discretized into two-dimensional elements and nodes for finite element analysis; and S2: the discretized portion are applied with internal stress in the normal directions of the two-dimensional elements from the inside of the discretized portion and deformed under the following conditions: (a) the two-dimensional elements are deformed within an elastic deformation range; and (b) adjacent ones of the two-dimensional elements have an angle therebetween which is free to change.

First FEA mesh model representing 3-D geometry of a carbon fiber reinforced composite (CFRC) product/part, pre-forming fiber orientation and desired reference fiber direction at a particular location on the product/part are received. First FEA mesh model contains finite elements associated with respective material properties for carbon fibers and binding matrix. Pre-forming fiber orientation includes number of fibers and relative angles amongst the fibers. Pre-forming 2-D shape of a workpiece used for manufacturing the product/part is obtained by conducting a one-step inverse numerical simulation that numerically expands the first to a second FEA mesh model based on numerically-calculated structural behaviors according to respective material properties. Pre-forming fiber orientation is superimposed on the second FEA mesh model with the desired reference fiber direction being preserved. Relative angles amongst all of the fibers on the product/part are determined by correlating the superimposed fiber orientation of the second to the first FEA mesh model.

A method performed by a computing system that facilitates formation of an object comprises receiving manufacturing process data associated with an object to be formed via a drape-forming operation. The computing system receives a parametric model of the object. The parametric model facilitates specification of a radius of a fillet within a region associated with the object. The computing system determines, based on the parametric model of the object, a unit vector field associated with a surface of the object and the manufacturing process data. The computing system adjusts the radius of the fillet of the parametric model within the region to reduce an average divergence of the vector field to a minimum amount, and communicates output data associated with an adjusted parametric model to equipment configured to form a mandrel that facilitates formation of the object.

A method for identifying a variation factor portion of a springback amount, including: performing press forming analysis under first press forming conditions, and calculating a residual stress distribution in a press formed part; performing springback analysis on the press formed part, and calculating a first springback amount; performing press forming analysis under second press forming conditions, and calculating a residual stress distribution in the press formed part; replacing a value of residual stress in a partial area of the residual stress distribution; performing springback analysis on the press formed part for which the value of the residual stress has been replaced, and calculating a second springback amount; obtaining a difference between the second springback amount and the first springback amount; and identifying a portion in the press formed part that is a factor for variation in springback amount of the press formed part based on the obtained difference.

A composite material includes stacked reinforced fiber substrates and has a thickness-varying part whose thickness in a stacking direction changes from a large thickness to a small thickness. The reinforced fiber substrate that has the drop-off portion and is positioned between a base substrate and a cover substrate in the stacking direction is set as a cut substrate. Stress analysis is performed on the base substrate, the cut substrate, and the cover substrate to calculate an evaluation value concerning stress on the cut substrate. A reinforced fiber substrate in the thickness-varying part is set at the cut substrate, based on the calculated evaluation value.

A method for designing fiber-composite parts in which part performance and manufacturing efficiency can be traded-off against one another to provide an “optimized” design for a desired use case. In some embodiments, the method involves generating an idealized fiber map, wherein the orientation of fibers throughout the prospective part align with the anticipated load conditions throughout the part, and then modifying the idealized fiber map by various fabrication constraints to generate a process-compensated preform map.

The present invention is a computer method of identifying failed members in a structure, comprising: extracting, a frame of a building, wherein the frame is comprised of a plurality of members; applying, at least one load on at least one of the plurality of members; analyzing, each of the plurality of members related to the stresses which are applied to each of the members by the at least one applied load; identifying, any members where the stresses exceed a predetermined maximum stress value; marking, each member within the building which was identified; generating, a report of the identified members and the calculations related to each of the identified members.

With respect to a method of simulating a capacitance-voltage (C-V) characteristic of a laminated structure that includes a semiconductor, an insulator provided on the semiconductor, and a metal provided on the insulator, and that includes multiple discrete interface states, at which electrons are trapped or emitted in response to a change of a voltage applied to the metal, at an interface between the semiconductor and the insulator, the method includes calculating a first capacitance in accordance with a first voltage applied to the metal, and calculating a second capacitance from a quantity of electrons emitted from a first interface state corresponding to the first voltage among the multiple discrete interface states. The calculating of the second capacitance includes changing the first voltage in stages and shifting the first interface state in stages.

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.

Methods, devices, and systems for providing a virtual construction and design of an interior wall of a home or office are described. The virtual construction and design provides for various substrate layers as they would exist within the interior wall, interactions between substrate layers, as well as environmental effects. The virtual construction can be implemented on a website so that a user of the website is able to create, select, and purchase customized wallpaper patterns with various color effects, three-dimensional effects, aging effects, texture effects, and environmental effects.