Since thin-walled composite structures are widely used in structural engineering, damage in such structures is an important issue of research. Matrix cracking is a principal cause of failure in composites. In the present study, a composite matrix cracking model is implemented in a thin-walled hollow circular cantilever beam using an effective stiffness approach. Such structures are used to mode...

The use of metallic materials in automotive industry leads to increasing fuel consumption and cost, so trends are starting lighter cheaper materials. In applications, fibers used composites because they stronger, stiffer, than bulk materials, can achieve higher energy absorbing compared purpose this work is study the potential utilization natural crash applications. experimental procedures (the...

In this paper, a novel foam-filled double ellipse tube (F-DET) is proposed. First, the circle and ellipse tubes with three different configurations(hollow, foam-filled, double foam-filled) are investigated under axial and oblique impact by using the nonlinear finite element code LS-DYNA. The numerical results showed that the F-DET tube has the best crashworthiness performance than tubes with ot...

Developing an appropriate design process for a conceptual model is a stepping stone toward designing car bodies. This paper presents a methodology to design a lightweight and modular space frame chassis for a sedan electric car. The dual phase high strength steel with improved mechanical properties is employed to reduce the weight of the car body. Utilizing the finite element analysis yields tw...

Thin-walled structures are widely used in anti-collision devices for various vehicles due to their light weight and high energy absorption. Offset collision is a common scene traffic accidents. Because the commonly thin-walled do not consider this complex method, absorption effect of structure cannot meet requirements. In paper, C-shaped frame composed steel tubes proposed. The configuration st...

Abstract With the development of rail transit industry, more attention has been paid to passive safety vehicles. Structural damage is one main failure behaviors in a vehicle collision, but it little past research. In this paper, quasi-static fracture experiments SUS301L-MT under different stress states were carried out. The mechanical properties material studied, and corresponding finite elemen...

In this paper, a new hybrid structure of body-centered cubic lattice-filled thin-walled tube is designed, and the specimens one-piece printing split-printing are prepared by laser melting technique. The deformation mode energy absorption characteristics investigated experiments numerical simulations. Under axial compression, printed forms more wrinkles with smaller wavelengths, specific increas...

Thin-walled structures have been used in many fields due to their superior mechanical properties. In this paper, two types of hierarchical multi-cell tubes, inspired by the self-similarity Pinus sylvestris, are proposed enhance structural energy absorption performance. The finite element models established validate crashworthiness performance under axial dynamic load. theoretical model mean cru...

A study is conducted to determine the sensitivity of 2 topologically distinct metamodel types to variations in the experimental design brought about by sequential adaptive sampling strategies. The study focuses on examples encountered in crashworthiness design. Three sampling strategies are considered for updating the experimental designs, namely (i) a single stage approach, (ii) a sequential a...