MAE 1351 EXAM 1

Drawings

A collection of images and other detailed graphical specifications intended to represent physical objects or processes for the purpose of accurately re-creating those objects or processes

Assemblies

A collection of parts that mate together to perform a specified function or functions

Systems

A collection of parts, assemblies, structures, and processes that work together to perform one or more prescribed functions

Image

A collection of printed, displayed, or imagined patterns intended to represent real objects, data, or processes

Mass Properties Analysis

A computer-generated document that gives the mechanical properties of a 3-D solid model

Ground Constraint

A constraint usually applied to a new sketch to fix the location of the sketch in space.

Holes

A cut feature added to a model that will often receive a fastener for system assembly

Profile

A planar sketch that is used to create a solid

Sketching Plane

A plane where 2-D sketches and profiles can be created.

Instruments

In engineering drawing, mechanical devices used to aid in creating accurate and precise images.

Projects

In engineering, a collection of tasks that must be performed to create, operate, or retire a system or device

The term "IPS" in SolidWorks refers to...

measurement units

Protrusion

A feature created by the addition of solid volume to a model

Cut

A feature created by the removal of solid volume from a model

Master feature

A feature or collection of features that is to be copied for placement at other locations in a model

Mirrored feature

A feature that is created as a mirror image of a master feature

Model

A mathematical representation of an object or a device from which information about its function, appearance, or physical properties can be extracted

Weighted Decision Table

A matrix used to weigh design options to determine the best possible design characteristics

Feature array

A method for making additional features by placing copies of a master feature on the model at a specified equal spacing.

Form Feature

A recognizable area on a solid model that has a specific function

Parts

A single object fabricated to perform one or more functions

sketching editor

A software tool used to create and edit sketches.

Blend

A solid formed by a smooth transition between two or more profiles

Double-sided extrusion

A solid formed by the extrusion of a profile in both directions from its sketching plane

Swept Features

A solid that is bound by the surfaces swept out in space as a profile is pulled along a path

Extrusion

A solid that is bounded by the surfaces swept out in space by a planar profile as it is pulled along a path perpendicular to the plane of the profile

Descriptive Geometry

A two-dimensional graphical construction technique used for geometric analysis of three-dimensional objects.

Driven Dimension

A variable connected to an algebraic constraint that can be modified only by user changes to the driving dimensions.

Driving Dimension

A variable used in an algebraic constraint to control the values of another (driven) dimension.

Extrude to the next surface

An extrusion begins at the profile and the protrusion or cut stops when it intersects the next surface encountered

Blind Extrusion

An extrusion made to a specified length in a selected direction.

Extrude through all

An extrusion that begins on the sketching plane and protrudes or cuts through all portions of the solid model that it encounters.

Chamfers

Angled cut transitions between two intersecting surfaces

To clock a hexagonal feature so that it rests horizontally on one side, I would...

Apply a horizontal constraint

sketches

Collection of 2-D entities

CAD

Computer-aided drawing. The use of computer hardware and software for the purpose of creating, modifying, and storing engineering drawings in an electronic format

Ribs

Constant thickness protrusions that extend from the surface of a part and are used to strengthen or stiffen the part

Algebraic Constraints

Constraint that define the value of a selected variable as the result of an algebraic expression containing other variables from the solid model.

To create a revolved feature, the profile and the axis of the revolution must be what?

Coplanar

To create a solid of revolution, I must... A) Select a plain line from the sketch to use as an axis B) Make an axis in the sketch using a construction line C) Use reference geometry to make an axis D) Any of the above will work

D) Any of the above will work

Geometrical Constraints

Definitions used to control the shape of a profile sketch through geometric relationships

Cosmetic Features

Features that modify the appearance of the surface but do not alter the size or shape of the object.

Datum Geometries

Geometric entities such as points, axes, and planes that do not actually exist on real parts, but are used to help locate and define other features.

Constraints

Geometric relationships, dimensions, or equations that control the size, shape, and/or orientation of entities in a sketch or solid model

What are the fundamental types of sketch constraints?

Geometrical and dimensional

I have a distance in my sketch preceded by a "sigma" symbol. This means...

It is a dimension driven by a parametric formula

Two-dimensional drawings

Mathematical modeling or drawing where the appearance of parts, assemblies, or structures are represented by a collection of two-dimensional geometric shapes

Three-dimensional modeling

Mathematical modeling where the appearance, volumetric, and inertial properties of parts, assemblies, or structures are created with the assistance of computers and display devices

Dimensional Constraints

Measurements used to control the size or position of entities in a sketch.

Variational techniques

Modeling techniques in which algebraic expressions or equations that express relationships between a number of variables and constants, any one of which can be calculated when all of the others are known.

Parametric techniques

Modeling techniques where all driven dimensions in algebraic expressions must be known for the value of the dependent variables to be calculated.

Optimization

Modification of shapes, sizes, and other variables to achieve the best performance based on predefined criteria.

The engineering design process follows the same steps as the scientific discovery process, or scientific method. True?

No; there are major differences

Shelling

Removing most of the interior volume of a solid model, leaving a relatively thin wall of material that closely conforms to the outer surfaces of the original model

Webs

Small, thin protrusions that connect two or more thicker regions on a part

Rounds

Smooth radius transitions of external edges created by two intersecting surfaces and tangent to both intersecting surfaces

Fillets

Smooth transitions of the internal edge created by two intersecting surfaces and tangent to both intersecting surfaces

Visualization

The ability to create and manipulate mental images of devices or processes

life cycle

The amount of time a product will be used before it is no longer effective

Base Feature

The first feature created for a part, usually a protrusion

Problem Identification

The first stage in the design process where the need for a product or a product modification is clearly defined

Graphical User Interface (GUI)

The format of information on the visual display of a computer, giving its user control of the input, output, and editing of the information

As-built drawings

The marked-up drawings from a civil engineering project that show any modifications implemented in the field during construction.

primary modeling planes, principal viewing planes, or datum planes

The planes representing the XY-, XZ-, and YZ-planes in a Cartesian coordinate system.

Green Engineering

The process by which environmental and life cycle considerations are examined from the outset in design

Regeneration

The process of updating the profile or part to show its new shape after constraints are added or changed

Engineering

The profession in which knowledge of mathematical and natural sciences gained by study, experience, and practice is applied with judgement to develop and utilize economically the materials and forces of nature for the benefit of humanity

Path

The specified curve on which a profile is placed to create a swept solid

Solid Modeling

Three-dimensional modeling of parts and assemblies, originally developed for physics and mechanical engineering use but presently used in all engineering disciplines.

To create an extrusion, I must first draw a sketch on a surface. True?

Yes, but the surface must be flat

Revolved solid

a solid formed when a profile curve is rotated about an axis

Extrude to a selected surface

an extrusion where the protrusion or cut begins on the sketching plane, and stops when it intersects a selected surface

Design

n. An original manifestation of a device or method created for performing one or more useful functions v. The process of creating a design (noun)