Peter Halldin
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A comparative study of constitutive models for EPS foam under combined compression and shear impact loading for helmet applications Open
Virtual testing of helmets using finite element (FE) analysis can be a valuable tool during product development. Still, its usefulness is limited by the quality of the constitutive model of the energy-absorbing material, usually foam. Buil…
View article: Evaluating child helmet protection and testing standards: A study using PIPER child head models aged 1.5, 3, 6, and 18 years
Evaluating child helmet protection and testing standards: A study using PIPER child head models aged 1.5, 3, 6, and 18 years Open
The anatomy of children’s heads is unique and distinct from adults, with smaller and softer skulls and unfused fontanels and sutures. Despite this, most current helmet testing standards for children use the same peak linear acceleration th…
View article: Radial and Oblique Impact Testing of Alpine Helmets onto Snow Surfaces
Radial and Oblique Impact Testing of Alpine Helmets onto Snow Surfaces Open
Recent studies have found that alpine helmets reduce the risk of focal injuries associated with radial impacts, which is likely due to current alpine helmet standards requiring helmets to be drop-tested on flat anvils with only linear acce…
Oblique impact responses of Hybrid III and a new headform with more biofidelic coefficient of friction and moments of inertia Open
New oblique impact methods for evaluating head injury mitigation effects of helmets are emerging, which mandate measuring both translational and rotational kinematics of the headform. These methods need headforms with biofidelic mass, mome…
View article: Work-related traumatic brain injury in the construction industry in Sweden and Germany
Work-related traumatic brain injury in the construction industry in Sweden and Germany Open
Work-related traumatic brain injuries (wrTBIs) in the construction industry have been studied in North America but, to the best of our knowledge, not in Europe. This study analyzed sets of public data on head injuries occurring in the cons…
View article: Finite Element Analysis of Long Posterior Transpedicular Instrumentation for Cervicothoracic Fractures Related to Ankylosing Spondylitis
Finite Element Analysis of Long Posterior Transpedicular Instrumentation for Cervicothoracic Fractures Related to Ankylosing Spondylitis Open
Study Design: Biomechanical finite element model analysis. Objectives: Spinal fractures related to ankylosing spondylitis (AS) are often treated by long posterior stabilization. The objective of this study is to develop a finite element mo…
View article: The effect of impact velocity angle on helmeted head impact severity: a rationale for motorcycle helmet impact test design
The effect of impact velocity angle on helmeted head impact severity: a rationale for motorcycle helmet impact test design Open
The impact velocity angle determined by the normal and tangential velocity has been shown to be an important description of head impact conditions but can vary in real-world accidents. The objective of this paper was to investigate the eff…