STMT at RWTH Aachen

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Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

Why do we need simulations?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

What is a model in case of simulations?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

Whats the difference between a model and a simulation?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

Which kind of information delivers a simulation?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

Which kind of models are there to estimate  manufacturing process, for example?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

What are physical models?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

What are empirical models?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

What are heuristic models?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

Whats the problem with heuristic and empirical models?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

What is the difference between forming(bulk and sheet) and sheet metal cutting?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

What is the difference between bulk and sheet metal forming in case of forces?

Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

What is the difference between bulk and sheet metal forming in case of plastic deformation?

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Exemplary flashcards for STMT at the RWTH Aachen on StudySmarter:

STMT

Why do we need simulations?

We use simulations to reduce costs in case of 

  • material use, tool cost and pre-rpoduction trials


to save time 

  • lead time, required time for training


and improve quality

  • reliability, complex parts, new materials

STMT

What is a model in case of simulations?

Abstract system that corresponds to a real system and is used for expensive and/or impossible investigations, calculations and explanations or demonstration purposes.

STMT

Whats the difference between a model and a simulation?

A simulation is a replication of a dynamic process based on a model.


A model is an simple abstraction/description of a real and complex system.

STMT

Which kind of information delivers a simulation?

It delivers general information about
- elements,
- structure and
- behavior
of a model during usage, to estimate correlations onto the reality.

STMT

Which kind of models are there to estimate  manufacturing process, for example?

  • Molecular dynamics (MD)
  • Kinematics
  • Finite Element Analysis
  • Fundamental
  • Regression
  • Artifical neural nets
  • rule based


rule based (macroscopic) -> MD (microscopic)

STMT

What are physical models?

Molecular Dynamics, Kinematics, Finite Element Analysis, Fundamental, Regressions (Artificial Neural Nets somehow included)

STMT

What are empirical models?

regression and artifical neural nets, they are based on experimental results and therefore only valid within these ranges

STMT

What are heuristic models?

rule based

STMT

Whats the problem with heuristic and empirical models?

Heuristic and empirical models are limited and difficult to transfer from one process to another. They are based on experimental results and are only valid within the same experimental range.

STMT

What is the difference between forming(bulk and sheet) and sheet metal cutting?

Forming (bulk, sheet):

  • Manufacturing by plastic deformation
  • Constant workpiece volume
  • Constant workpiece mass
  • workpiece stays one piece


Sheet metal cutting:

  • Manufacturing by cutting
  • Material cohesion is released locally
  • No generation of formless substance
    (no chips)

STMT

What is the difference between bulk and sheet metal forming in case of forces?

bulk forming - high forces needed

Sheet metal forming - Low to medium forces

STMT

What is the difference between bulk and sheet metal forming in case of plastic deformation?

Bulk Forming - high plastic deformation


Sheet metal forming - Lower plastic deformation

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Fachvokabular JD2020

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