Biofidelity Evaluation of a Prototype Hybrid III 6 Year-Old ATD Lower Extremity

Boucher, Laura C.; Bing, Julie; Bolte, John H.

doi:10.1007/s10439-016-1562-1

Cited by 2 publications

(8 citation statements)

References 26 publications

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“…This is a consistent finding with previous KBA testing (Boucher et al 2016). The least injurious position was seen in KBA test 029, with the feet flat on the floor.…”

Section: Discussionsupporting

confidence: 92%

“…To evaluate the durability of the design of the ATD-LE under dynamic conditions as well as to provide a comparison with previous tests, the ATD-LE was seated in the same KBA test setup used in Boucher et al (2016; Table 1). Instrumentation in the HIII-LE included 6-axis load cells in the right distal femur and bilateral tibiae.…”

Section: Atd Position and Test Setupmentioning

confidence: 99%

“…ATD positions in the front seat were chosen based on a report by Powell and Zuby (1999) for the Insurance Institute for Highway Safety and as a continuation of the study by Boucher et al (2016). Data were collected using a DTS TDAS PRO LAB data acquisition system For each test, 5 parameters were examined: femur axial load (N), femur moment (Nm), tibia axial load (N), tibia moment (Nm), and tibia index.…”

Section: Atd Position and Test Setupmentioning

confidence: 99%

“…A prototype HIII 6-year-old leg (ATD-LE) was developed, which included a tibia load cell and a more biofidelic ankle (Boucher et al 2016). The biofidelity and design functionality of the ATD-LE has only been evaluated until this point.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the objective of the current project was to evaluate the repeatability of the response of the ATD-LE by measuring tibia force (N), tibia bending moment (Nm), ankle range of motion (ROM), and stiffness of the ATD-LE. A secondary objective was to quantify the dynamic response of the ATD-LE by performing knee bolster air bag (KBA) tests using the same protocol from previous work in our lab (Boucher et al 2016) and comparing these data to published injury response thresholds and previously collected data.…”

Section: Introductionmentioning

confidence: 99%

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Repeatability testing of a new Hybrid III 6-year-old ATD lower extremity

Boucher

Ryu

Kang

et al. 2017

Traffic Injury Prevention

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Objective: Vehicle safety is improving, thus decreasing the number of life-threatening injuries and increasing the need for research in other areas of the body. The current child anthropomorphic test device (ATD) does not have the capabilities or instrumentation to measure many of the potential interactions between the lower extremity and the vehicle interior. A prototype Hybrid III 6-year-old ATD lower extremity (ATD-LE) was developed and contains a tibia load cell and a more biofidelic ankle. The repeatability of the device has not yet been assessed; thus, the objective was to evaluate the repeatability of the ATD-LE. Additionally, a dynamic assessment was conducted to quantify injury threshold values. Methods: A pneumatic ram impactor was used at 2 velocities to evaluate repeatability. The ATD-LE was fixed to a table and impacted on the plantar aspect of the forefoot. Three repeated trials at 1.3 and 2.3 m/s without shoes and 2.3 m/s with shoes were conducted. The consistency of tibia force (N), bending moment (Nm), ankle range of motion (ROM,°), and stiffness (Nm/°) were quantified. A dynamic assessment using knee bolster airbag (KBA) tests was also conducted. The ATD-LE was positioned to mimic 3 worst-case scenarios: toes touching the mid-dashboard, touching the lower dashboard, and flat on the floor prior to airbag deployment. The impact responses in the femur and tibia were directly collected and compared with published injury threshold values. Results: Ram impact testing indicated primarily excellent repeatability for the variables tested. For all 3 conditions the coefficients of variance (CV) were as follows: tibia force, 1.9-2.7%; tibia moment, 1.0-2.2%; ROM, 1.3-1.4%; ankle stiffness, 4.8-15.6%. The shoe-on condition resulted in a 25% reduction in tibia force and a 56% reduction in tibia bending moment. The KBA tests indicate that the highest injury risk may be when the toes touch the lower dashboard, due to the high bending moments recorded in the tibia at 76.2 Nm, which was above the injury threshold. Conclusions:The above work has demonstrated that the repeatability of the ATD-LE was excellent for tibia force, bending moment, and ankle ROM. The ATD-LE has the ability to provide new information to engineers and researchers due to its ability to directly evaluate the crash response of the ankle and leg. New information on injury mechanism and injury tolerance may lead to injury reduction and thus help advance the safety of children.

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“…This is a consistent finding with previous KBA testing (Boucher et al 2016). The least injurious position was seen in KBA test 029, with the feet flat on the floor.…”

Section: Discussionsupporting

confidence: 92%

Section: Atd Position and Test Setupmentioning

confidence: 99%

Section: Atd Position and Test Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Repeatability testing of a new Hybrid III 6-year-old ATD lower extremity

Boucher

Ryu

Kang

et al. 2017

Traffic Injury Prevention

Self Cite

View full text Add to dashboard Cite

show abstract

Femur loading in feet-first fall experiments using an anthropomorphic test device

Thompson

Bertocci

Smalley

2018

Journal of Forensic and Legal Medicine

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Fall dynamics play an important role in the biomechanical assessment of falls. Fall height was found to influence both fall dynamics and femur loading, while impact surface affected only compression and bending in feet-first falls; fall dynamics did not differ across carpet and linoleum. Improved pediatric thresholds are necessary to predict likelihood of fracture, but morphologically accurate representation of the lower extremity, along with accurate characterization of loading in falls are a crucial first step.

show abstract

Biofidelity Evaluation of a Prototype Hybrid III 6 Year-Old ATD Lower Extremity

Cited by 2 publications

References 26 publications

Repeatability testing of a new Hybrid III 6-year-old ATD lower extremity

Repeatability testing of a new Hybrid III 6-year-old ATD lower extremity

Femur loading in feet-first fall experiments using an anthropomorphic test device

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