• MEM30006A - Calculate stresses in simple structures

Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

MEM30006A Mapping and Delivery Guide
Calculate stresses in simple structures

Version 1.0
Issue Date: March 2024


Qualification -
Unit of Competency MEM30006A - Calculate stresses in simple structures
Description This unit covers determining stresses and their effect on the strength and stability of simple structures and mechanical components.
Employability Skills This unit contains employability skills.
Learning Outcomes and Application This unit applies to the calculation of stresses in centrally loaded bolted connections, fillet and butt welded connections.All work is carried out under supervision.Band: 0Unit Weight: 0
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.
Prerequisites/co-requisites Path 1MEM30012A Apply mathematical techniques in a manufacturing engineering or related environment
Competency Field Engineering technician
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities
Slides
PPT
Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Determine stresses in simple structures and mechanical components
  • The shear stresses in simple bolted connections are determined.
  • The nominal weld size or length of weld required on simple welded connections is determined to meet load requirements.
  • Torque distribution diagrams are drawn and used to calculate torsional shear stress and angle of twist on threaded bolts subjected to torques.
       
Element: Verify stress levels using appropriate reference material
  • Appropriate reference materials are used to verify that stress loading is acceptable and in accordance with standard operational procedures.
  • Verification results are reported according to standard operational procedures.
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

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


Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)


Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

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

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

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
The shear stresses in simple bolted connections are determined. 
The nominal weld size or length of weld required on simple welded connections is determined to meet load requirements. 
Torque distribution diagrams are drawn and used to calculate torsional shear stress and angle of twist on threaded bolts subjected to torques. 
Appropriate reference materials are used to verify that stress loading is acceptable and in accordance with standard operational procedures. 
Verification results are reported according to standard operational procedures. 

Forms

Assessment Cover Sheet

MEM30006A - Calculate stresses in simple structures
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:


Assessment Record Sheet

MEM30006A - Calculate stresses in simple structures

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

Date: