DT Topic 3

Aesthetic Models

Aesthetic Models

A model developed to look and feel like the final product

Assembly drawings

A diagram that shows how components fit together to make a whole

Bottom-up modelling

A designer creates part geometry independent of the assembly or any other component

Computer Aided Design (CAD)

The use of computers to aid the design process

Conceptual Modelling

A model that exists in the mind used to help us know and understand ideas

Digital Human

Computer simulation of a variety of mechanical and biological aspects of the human body

Fidelity testing

The degree to which a prototype is exactly like the final product

Finite element analysis

The calculation and simulation of unknown factors in products using CAD systems. For example, simulating the stresses within a welded car part

Formal Drawing techniques

A type of drawing technique that has fixed rules, the most widely used being isometric projection and perspective drawing

Fused deposition modelling (FDM)

A 3D printing technique that places melted layers of material on a bed to build up a 3D model

Graphical models

A visualisation of an idea, often created on paper or through software, in two or three dimensions

Haptic technology-vibrations

Haptic technology is an emerging technology that interfaces the user via the sense of touch

Instrumented models

Prototypes that are equipped with the ability to take measurements to provide accurate quantitative feedback for analysis

Mock-ups

A scale or full-size representation of a product used to gain feedback from users

Part Drawings

Orthographic drawings of the components of an assembly containing details just about that component

Perspective

A set of formal drawing techniques that depicts an object as getting smaller and closer together the further away they are. The objects one, two and three-point perspective

Physical modelling

The creation of a smaller or larger tangible version of an object that can be physically interacted with

Projection drawings

Systems of drawing that are accurately drawn, the two main types are isometric projection (formal drawing technique) and orthographic projection (working drawing technique)

Prototypes

A sample or model built to test a concept or process, or to act as an object to be replicated or learned from. Prototypes can be developed at a range of fidelity and for different contexts

Scale drawings

Drawings that are bigger or smaller than the real product, but exactly in proportion with product

Scale models

A model that is either a smaller or larger physical copy of an object

Selective laser sintering (SLS)

An additive manufacturing technique that uses a laser to fuse small particles of material into a mass that has a desired 3D shape (CAD manufacturing)

Sketches

Rough drawings of ideas used to convey or refine the idea

Solid modelling

Solid models are clear representations of the final part.They provide a complete set of data for the product to be realised

Stereo-lithography

A modelling technique that creates 3D models layer by layer by hardening molecules of a liquid polymer using a laser beam

Surface Modeling

A realistic picture of the final model, offering some machining data. Surface models contain no data about the interior of the part

Top-down modelling

"Top down” design is a product development process obtained through 3D, parametric and associative CAD systems. The main feature of this new method is that the design originates as a concept and gradually evolves into a complete product consisting of components and sub-assemblies

Virtual Prototyping

Photo realistic CAD based interactive models that use surface and solid modelling. They can be considered ‘digital mock ups’

Virtual Reality (VR)

The ability to simulate a real situation on the screen and interact with it in a near-natural way

Working Drawings

Drawings that are used to guide the production of a product, most commonly orthographical projection, section drawings, part drawings, assembly drawings and plan drawings