The dynamic responses of sandwich panels with homogeneous and stepwise graded aluminium foam cores subjected to impact loadings were investigated via experimentation finite element simulation in this paper. low-velocity tests conducted using a drop-weight facility at four different velocities, the results which compared terms force-displacement response, energy absorption damage status. It was found that density gradient had marked influence on deformation failure behaviour front facesheets....

Motorcycle to vehicle impact accidents occur frequently in real world and often cause serious brain injuries deaths of motorcyclists. This study aims research the motorcyclist head responses helmet protection performance at common motorcycle-vehicle scenarios. First, multi-body system (MBS) models were developed investigate motorcyclist's conditions (position, orientation velocity) time impacts with vehicle. Then, input finite element (FE) striking obtain tissue level responses, such as coup...

The car front bumper system needs to meet the requirements of both pedestrian safety and low-speed impact which are somewhat contradicting. This study aims design a new kind modular self-adaptive energy absorber can balance two performances. X-shaped energy-absorbing structure was proposed enhance absorption capacity during by changing its deformation mode based on amount external collision energy. Then, finite element simulations with realistic vehicle performed demonstrate crashworthiness...

A common reconstruction procedure after a wide resection of bone tumors around the knee is endoprosthetic replacement. The aim this study was to investigate characteristics injury patient replacement during walking.A subject-specific finite element model femur-prosthesis-tibia complex established via CT scans. To obtain its physiologically realistic loading environments, musculoskeletal inverse dynamic analysis implemented. extracted muscle forces and ground were then applied stress...

Due to the good mechanical performances and design flexibility of Long Glass Fiber Reinforced Polypropyl-ene (LGFRP) composite, it has been increasingly used in automotive components, which LGFRP components are likely sustain different strain rates loading during a crash event. This study aims investigate correlations between rate, will be applied crash-worthiness energy absorbing property analysis bumper beam under longitudinal impact. Firstly, rate dependent material properties determined,...

With the rapid development of car crash sensing and identification technology, application pre-triggering airbag system is becoming an important option to improve vehicle safety. Thus, present study aims investigate injury protection ability optimize its performance in frontal crashes regarding key physical parameters. A driver restraint model established validated by National Crash Analysis Center was employed for studying system. Then, influences triggering time, volume scaling factor,...

A simultaneous shape and stacking sequence optimization algorithm is presented for laminated composite free‐form shells, by which the coupled effect of can be considered. The objective determined as maximizing fundamental natural frequency to obtain largest stiffness shells. Nonuniform rational B‐spline (NURBS) employed represent geometrical shapes. coordinates NURBS control points fiber orientations are set up continuous discrete variables, respectively, optimized simultaneously. To improve...

Non-fatal tibia and ankle injuries without proper protection from the restraint system has gotten wide attention researchers. This study aimed to investigate occupant under realistic frontal impact environment that is rarely considered in previous experimental simulant studies.An integrated occupant-vehicle model was established by coupling an isolated car cab a hybrid with biofidelic pelvis-lower limb model, while its loading conditions were extracted full-frontal test. A parametric...

Long glass fiber‐reinforced polypropylene (LGF/PP) foaming composite has been increasingly used in automotive components regarding its good mechanical and acoustic properties. However, the balance of property is far from being understood. The objective this study to investigate influences molding thickness or degree on both properties LGF/PP by experimental tests. First, felts with consistent surface density were fabricated, then specimens a series thicknesses prepared compression molding....

Seatbelt contact friction coefficient may have some influence on chest injury prediction because it can affect the position of seatbelt during impact. The objective was to study predicted rib fracture outcome in frontal Four simulations impact sled tests same environment were conducted wherein between and model varied. A noticeable effect observed increasing which tended cause a slight decrease number fractures. Despite this, magnitude sensitivity small, suggesting that absence other...