I. INTRODUCTION For restraint development, the design standard is the 50th percentile male, with a stature of 175 cm and a weight of 77 kg [1]. However, for Whiplash Associated Disorders (WAD), injury statistics show that the average female is at 1.5–3 times higher risk than males of sustaining injury [2]. WAD occur in all impact directions, but rear‐end impacts are the most frequent cause. Hence, seat design is central for good occupant protection. Previous work has shown differences in the response of male‐ and female‐sized dummies in evaluation of different seat concepts [3]. For the average male occupant, several numerical Human Body Models (HBMs) have been developed and are used for impact biomechanics research; for the average female, much more limited modelling efforts have been made [4]. Therefore, the aim of this study is to create a 50th percentile female HBM. The model will be released under the Open Source license GPL v3, and at the present stage the work is focused on rear‐end impacts and seat assessment by developing a detailed cervical spine model and a kinematic whole‐ body model (WBM). II. METHODS In a previous study [5], a 50th percentile female ligamentous cervical spine model was developed from surface data and validated for physiological loading. Here, this model is integrated into a WBM developed from image data acquired using a multi‐modality approach [6‐8]. Whole‐body Model Development A 50th percentile female subject of 161.6 cm stature and 60.8 kg weight was selected (close to the reported 161.8 cm and 62.3 kg for a 50th percentile female [1]), and a total of 138 scan series, with approximately 20,000 images, were captured in an automotive seated posture. Stereolithography (STL) surfaces were created from the image data and based on this surface data, a finite element (FE) mesh was created (Fig. 1). Soft tissues are modelled with deformable elements, and the skeleton was modelled with rigid bodies, connected by compliant kinematical joints, to provide a biofidelic kinematic response during impact. Fig. 1. Overview of the WBM (right) and the integrated cervical spine model in the WBM (left). J. Östh (e‐mail: jonas.osth@chalmers.se; tel: +46 31 772 15 36) and M. Mendoza‐Vazquez are researchers and K. Brolin and M.Y. Svensson are Professors, all at Chalmers University of Technology, Sweden. A. Linder is Research Director at the Swedish National Road and Transport Research Institute and an Adjunct Professor at Chalmers University of Technology. Jonas Östh, Manuel Mendoza‐Vazquez, Mats Y. Svensson, Astrid Linder and Karin Brolin Development of a 50th Percentile Female Human Body Model IRC-16-76 IRCOBI Conference 2016 - 573 -