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Elements and Performance Criteria

  1. Analyse response to steady and static loads
  2. Analyse response to time varying loads
  3. Analyse the effect of environment/ history on mechanical response
  4. Analyse the effect of shape on mechanical response

Range Statement

This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included.

Regulatory framework

The latest version of all legislation, regulations, industry codes of practice and Australian/international standards, or the version specified by the local regulatory authority, must be used.

Applicable legislation, regulations, standards and codes of practice include:

health, safety and environmental (HSE) legislation, regulations and codes of practice relevant to the workplace, materials and processes being used and products being made

Australian/international standards relevant to the materials and products being tested

any relevant licence and certification requirements.

All operations to which this unit applies are subject to stringent HSE requirements, which may be imposed through state/territory or federal legislation, and these must not be compromised at any time. Where there is an apparent conflict between performance criteria and such requirements the legislative requirements take precedence.

Procedures

All operations must be performed in accordance with relevant procedures.

Procedures are written, verbal, visual, computer-based or in some other form, and include one or any combination of:

test procedures

technical specifications

technical drawings

emergency procedures

work instructions

standard operating procedures (SOPs)

safe work method statements (SWMS)

formulae/recipes

batch sheets

temporary instructions

any similar instructions provided for the smooth running of the plant.

Tools and equipment

Tools and equipment include:

stress/strain testers

impact testers

cycling testers

environmental ageing equipment

basic length/thickness measuring equipment.

Hazards

Hazards must be identified and controlled. Identifying hazards requires consideration of:

stored energy (e.g. in stressed test samples)

test preparation equipment

conditions and materials used for causing sample degradation

hazardous products and materials

other hazards that might arise.

Performance Evidence

Evidence required to demonstrate competence in this unit must be relevant to and satisfy the requirements of the elements and performance criteria and demonstrate the ability to:

read and interpret test results, technical information, technical drawings, graphs, equipment specifications and instruments/control panels

determine and analyse the viscoelastic response of polymer materials/components to various stress and strain conditions, including:

impact, steady and repeated application

application under different physical and chemical conditions

response of different shapes

response of different polymers

identify applications where these responses are advantageous

identify options for modifying these responses to suit different applications

communicate technical information verbally and in writing

calculate stress/strain and related data.

Knowledge Evidence

Must provide evidence that demonstrates knowledge relevant to their job sufficient to fulfil their job role, including knowledge of:

models of viscoelasticity

classical (i.e. elastic) stress and strain

classical (i.e. elastic) Young's modulus and Poisson ratio

stress, compression, shear and torsion

stiffness and bending moments

creep and relaxation

effects of temperature (above and below the glass transition point)

effects of degradation, e.g. surface oxidation (such as UV, O3); swelling (such as solvent, chemical)

three dimensional responses to stress

responses to stress cycling, including heat build up

mechanical responses to changing the properties of polymer structures and components

relationship of polymer viscoelastic responses to product applications

applications where typical polymer properties are an advantage

common methods of modifying response to suit different applications

methods for determining polymer viscoelastic response to stress and strain under various conditions, including:

impact, steady and repeated application

application under different physical and chemical conditions

response of different shapes

response of different polymers

organisation procedures relevant to the work environment/job role

hierarchy of control

hazards that may arise in the job/work environment and:

their possible causes

potential consequences

appropriate risk controls.