Many engineering components or assemblies normally experience moderate loads, but must be capable of withstanding extreme loads resulting from shock or impact type events.
Confirmation that a component or assembly is capable of withstanding shock or impact loadings can be achieved through physical testing or analysis.
Physical shock testing is generally expensive to perform, and if the structure fails, it often provides limited information to help understand the cause of the failure, and what design changes need to be made.
A shock analysis or an impact analysis can be performed to assess how the component or assembly would perform, and provides detailed information regarding the behaviour and stress levels, strains, deflections, accelerations etc.
Eatec Engineering Analysis performs shock and impact analyses using finite element analysis (FEA). By using advance FEA software, the behaviour of a component or assembly can be represented accurately. Interactions between components can be modelled realistically using contact surfaces, elastic/plastic behaviour of the materials can be represented along with geometric non-linearity and non-linear mount characteristics.
Shock or impact analyses are normally performed to identify one or more of the following:
- Peak stress and strain levels
- Peak deflections, velocities or accelerations
- Forces carried by connections or mounts
In some projects, the shock or impact analysis identifies that the design is not capable of withstanding the loading, and hence needs to be revised. In these instances, where required, Eatec Engineering Analysis works with the client to optimise the design in order that it complies with the shock or impact requirements.