Abstract In current work, the crashworthiness of woven carbon fiber reinforced plastic (CFRP) hat section component is investigated under two types of loading experimentally and numerically, i.e., axial crushing and dynamic three-point bending. The crushing characteristics of woven CFRP hat section sample are evaluated at various impact velocities and layup orientations which exhibit different effects under two types of loading. With impact velocity/energy increasing, the bending behaviors illustrate different evolutions with distinct stages which are affected by the damage development. Layup orientation shows a little effect on the bending behaviors, while it exerts remarkable effects on the axial crushing which leads to different crushing modes and thus different energy absorption capabilities. The finite element model with multiple layers of thick shell element and cohesive element is shown to capture the crushing behaviors reasonably well in both axial crushing and dynamic bending. The corresponding damage evolutions are also analyzed with simulations to explain the crushing behaviors.
Abstract The mechanical behaviors and damage evolutions of carbon/epoxy woven fabric composites with three different geometries, i.e., one plain weave and two twill weave patterns with different areal densities, are studied under tensile loading. The effects of weave patterns on mechanical properties are investigated by monotonic and cyclic tension tests. Remarkable variations in stress-strain curve, Poisson’s ratio, residual strain and strain map exist in the three composites. Crimp ratio is fo...
Abstract The mechanical properties and damage behaviors of carbon/epoxy woven fabric composite under in-plane tension and compression are studied at the meso-scale level through experiment and simulation. An efficient representative volume element (RVE) modeling method with consistent mesh, high yarn volume fraction and realistic geometry is proposed. The material constitutive laws with plasticity, tension-compression asymmetry and damage evolution are established for the three components - yarn...
#1Qiang Liu(SYSU: Sun Yat-sen University)H-Index: 21
#1Qiang Liu(SYSU: Sun Yat-sen University)H-Index: 82
Last. Qing Li(USYD: University of Sydney)H-Index: 80
view all 5 authors...
Abstract Design of multi-cell sectional configuration has been considered an effective way to enhance the crashworthiness performance of metallic thin-walled structure. Nevertheless, it remains under-studied whether this approach can achieve similar effect for fiber reinforced composite structures. Therefore, this paper aims to study the crushing responses and energy absorption behaviors of multi-cell squared carbon fiber reinforced plastic (CFRP) tubes fabricated by using hot compression moldin...
Abstract The mechanical properties and damage evolutions of carbon/epoxy woven fabric composites with three different fabric architectures, including one plain weave and two twill weave patterns, are experimentally investigated under multiaxial stress states. In particular, the effects of weave patterns are investigated by monotonic and cyclic off-axis tension tests. Both elastic modulus and strength degrade remarkably with increasing off-axis loading angle, while Poisson's ratio is much higher ...
Last. Qing Li(USYD: University of Sydney)H-Index: 80
view all 5 authors...
Abstract Thin-walled composite structures are increasingly used in vehicles attributed to their lightweight and high energy-absorbing capacity. However, understanding crushing behavior of tubal structures made of different materials for lateral impact loading from different directions is fairly limited, which restricts their further applications. This study aimed to investigate the oblique lateral crashworthy characteristics of thin-walled circular tubes with aluminum, glass fiber reinforced pol...
#1Guowei Zhou(OSU: Ohio State University)H-Index: 11
#2Qingping Sun(NUAA: Nanjing University of Aeronautics and Astronautics)H-Index: 8
Last. Yinghong Peng(SJTU: Shanghai Jiao Tong University)H-Index: 25
view all 7 authors...
Abstract The dynamic crushing characteristics of unidirectional carbon fiber reinforced plastic composites under two loading types, dynamic three-point bending and axial crushing, are investigated by experiment and finite element simulation. Hat section samples with two different layup orientations are tested at various impact velocities to investigate its effects. The experiment results show that delamination plays a critical role in dynamic bending deformation. Different layup orientations lea...
#1Qiang Liu(SYSU: Sun Yat-sen University)H-Index: 21
#1Qiang Liu(SYSU: Sun Yat-sen University)H-Index: 82
Last. Qing Li(USYD: University of Sydney)H-Index: 80
view all 6 authors...
Abstract Open holes and cutouts have been widely used in composite structures for various engineering purposes. However, perforation could largely alter the structural responses and crashing behavior, thereby creating significant challenge in composite design. This study carried out a parametric study and design optimization on the perforation parameters for the perforated carbon fiber reinforced plastic (CFRP) square tubes to improve the structural crashworthiness. First, a finite element model...
#1Zhixin Huang(HUST: Huazhong University of Science and Technology)H-Index: 3
#2Xiong Zhang(HUST: Huazhong University of Science and Technology)H-Index: 20
Last. Xiong Zhang(HUST: Huazhong University of Science and Technology)H-Index: 63
view all 2 authors...
Abstract This paper aims to investigate the bending collapse and crashworthiness of the quadruple-cell Al/CFRP (aluminum/carbon fiber reinforced plastic) hybrid tubes under quasi-static and dynamic loading. Three-point bending tests were first conducted for pure Al tubes and Al/CFRP hybrid tubes with different wrapping angles. Experimental results show that the enhancement effect of CFRP wrapping on energy absorption efficiency of hybrid structures was affected by several factors. Numerical anal...
#1Zhixin Huang(HUST: Huazhong University of Science and Technology)H-Index: 3
#2Xiong Zhang(HUST: Huazhong University of Science and Technology)H-Index: 20
Last. Chongyi Yang(HUST: Huazhong University of Science and Technology)H-Index: 2
view all 3 authors...
Abstract Wrapping the structures with composites and adopting multi-cell sections are two typical methods to improve the crashworthiness of thin-walled beams. However, the effects of combining these two methods on crashworthiness are not clear. This paper aims to investigate the bending collapse and crashworthiness of the multi-cell aluminum/carbon fiber reinforced plastic (Al/CFRP) hybrid tubes under quasi-static and dynamic loading. Three-point bending tests are firstly conducted for the CFRP,...
Abstract Thin-walled beams are widely adopted as the key frontal energy absorption component in automotive body. This work focused on the numerical modelling of a CFRP hat-shaped thin-walled beam under axial-crushing load, which was well validated against testing data as well as experimentally observed fracture behaviour. CFRP hat beam was manufactured with prepreg IM7/8552 through hot-press moulding, and then bonded with a base plate using structural adhesive. The adhesively bonded CFRP beam wa...