NTISthis.com

Evidence Guide: MEM30006A - Calculate stresses in simple structures

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MEM30006A - Calculate stresses in simple structures

What evidence can you provide to prove your understanding of each of the following citeria?

Determine stresses in simple structures and mechanical components

  1. The shear stresses in simple bolted connections are determined.
  2. The nominal weld size or length of weld required on simple welded connections is determined to meet load requirements.
  3. Torque distribution diagrams are drawn and used to calculate torsional shear stress and angle of twist on threaded bolts subjected to torques.
The shear stresses in simple bolted connections are determined.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

The nominal weld size or length of weld required on simple welded connections is determined to meet load requirements.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Torque distribution diagrams are drawn and used to calculate torsional shear stress and angle of twist on threaded bolts subjected to torques.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Verify stress levels using appropriate reference material

  1. Appropriate reference materials are used to verify that stress loading is acceptable and in accordance with standard operational procedures.
  2. Verification results are reported according to standard operational procedures.
Appropriate reference materials are used to verify that stress loading is acceptable and in accordance with standard operational procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Verification results are reported according to standard operational procedures.

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, required skills and knowledge, range statement and the Assessment Guidelines for the Training Package.

Overview of assessment

A person who demonstrates competency in this unit must be able to calculate stresses in simple structures as defined. Competency in this unit cannot be claimed until all prerequisites have been satisfied.

Critical aspects for assessment and evidence required to demonstrate competency in this unit

Assessors must be satisfied that the candidate can competently and consistently perform all elements of the unit as specified by the criteria, including required knowledge, and be capable of applying the competency in new and different situations and contexts.

Context of and specific resources for assessment

This unit may be assessed on the job, off the job or a combination of both on and off the job. Where assessment occurs off the job, that is the candidate is not in productive work, then an appropriate simulation must be used where the range of conditions reflects realistic workplace situations. The competencies covered by this unit would be demonstrated by an individual working alone or as part of a team. The assessment environment should not disadvantage the candidate.

This unit could be assessed in conjunction with any other units addressing the safety, quality, communication, materials handling, recording and reporting associated with calculating stresses in simple structures, or other units requiring the exercise of the skills and knowledge covered by this unit.

Method of assessment

Assessors should gather a range of evidence that is valid, sufficient, current and authentic. Evidence can be gathered through a variety of ways including direct observation, supervisor's reports, project work, samples and questioning. Questioning techniques should not require language, literacy and numeracy skills beyond those required in this unit of competency. The candidate must have access to all tools, equipment, materials and documentation required. The candidate must be permitted to refer to any relevant workplace procedures, product and manufacturing specifications, codes, standards, manuals and reference materials.

Guidance information for assessment

Required Skills and Knowledge

Required skills

Look for evidence that confirms skills in:

interpreting drawings and graphical representations

calculating stresses using given formulas

construction of torque distribution diagrams

accessing relevant codes and reference material

interpreting results against reference materials

Required knowledge

Look for evidence that confirms knowledge of:

stress and strain:

normal stress and strain

modules of elasticity

deformation

Poisson's Ratio

shear stress and strain

modulus of rigidity

yield stress, ultimate stress, proportional limit, factor of safety, allowable stress

centrally loaded connections

bolted connections

shear, tensile, torque and bearing stresses

centrally loaded welded connections

fillet and butt welds, method of failure

size and length of weld

effect of hole punching

longitudinal stress

how to access and use relevant codes and reference material

Range Statement

The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. Essential operating conditions that may be present with training and assessment (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) may also be included.

Simple structures

Limited to consideration of centrally loaded bolted connections, fillet and butt welded connections

Reference materials

May include design manuals, handbooks, relevant codes and regulations, databases and manufacturers' references