Engineering: Lab report

Whatever branch of engineering you are studying, many of your labs and lab based assignments will require a written report. The purpose is to report what you did and what you learned from an experiment.

Lab reports can vary in length and format. These range from a form to fill in and submit before leaving the lab, to a formal written report. However, they all usually follow a similar basic structure.

Example: Typical Lab report structure


A. Student


Perspex samples with sharp and blunt cracks were subjected to loads to determine fracture toughness. Results clearly show a correlation between...


To determine the fracture toughness of Perspex.


Fracture toughness is a measure of the fracture resistance of a cracked material. The two types of crack investigated here are shown in Figure 1. For a sharp crack to propagate...


Six Perspex samples with artificial blunt cracks of various sizes were supplied. The samples were secured into the micro-tester and the strain rate and maximum load parameters set to...

Results and Discussion

The six specimens were tested to three loads and the corresponding deflection calculated. The average compliance at each crack length was calculated; these are plotted in Graph 1. The calculated exponent is close to the quadratic relationship...


The experimental results show that fracture toughness decreases with increased crack length and velocity...

Structure of a lab report

A lab report in engineering generally contains the following sections: