๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

The effectiveness of foams in bicycle and motorcycle helmets

โœ Scribed by N.J. mills; A. gilchrist

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
1003 KB
Volume
23
Category
Article
ISSN
0001-4575

No coin nor oath required. For personal study only.

โœฆ Synopsis

The optimisation of the foam used for shock absorption in bicycle and motorcycle helmets is considered. It is shown that for the former, the ideal foam yield stress for impact with a rigid protruding object is higher than that for impact with a deformable flat object. Therefore, the design must be a compromise. For motorcycle helmets the shell stiffness is higher and the force to cause shell buckling plays a significant part in the response. Lower density foams can be used only if the impact test standards are rewritten with less emphasis on impacts with convex and pointed objects.

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