A mesoscale composite damage model, with new non-linear shear constitutive laws, which combines a range of novel techniques to accurately capture the material response under crushing, is presented.
This paper is concerned with numerical simulation utilizing LS-DYNA MAT54 for axial crush of glass-fiber mat/PA6 composite tubes. The crush simulation aims at reproducing the crush energy absorption capability measured from dynamic drop tests. The adopted MAT54 has a merit as a widely commercialized model of composite materials …
After these specimens were cut in the extrudate, the tensile and compression specimens were cut directly from the U profile, which was formed by compression molding using two plies of GMT material as illustrated in Fig. 2b. To determine the quasi-static mechanical properties of these glass mat thermoplastic materials a tensile test machine …
2. Problem statement. The optimization problem statement is defined as expressed in Equation 1, where minimum total material cost (see Equation 2) and maximum EA of the CFRP beam during axial crushing test were selected as the optimization objective in this work. In particular, the cost in this work only contains the …
The choice for a proper external trigger and fiber hybridization configuration has a significant impact on the stability of the crushing process and material cost for composite structures in crashworthiness. However, there is still a lack of a thorough understanding of impact characteristics and energy-absorption mechanisms.
In the present research, the energy absorption and collapse behaviors of composite-coated corrugation-reinforced cylindrical absorbers were studied. The composite-coating of the cylindrical absorbers was done with carbon filaments using the filament winding method. Plots of force–displacement curves and fundamental indices of …
1. Introduction. Due to the high specific stiffness and specific strength, Carbon Fiber Reinforced Plastic (CFRP) composites show great potential in aerospace industry and automotive industries [1].Deliberately designed CFRP also has excellent property of specific energy absorption (SEA) when compared with conventional materials on a …
The composite materials under consideration are namely, carbon/epoxy, graphite/epoxy, glass/epoxy, kevlar/epoxy and boron/epoxy with the lay-up of [0/90/45/90/0] for all laminates with thickness of 2 mm per lamina which gives us the total thickness of 10 mm. Out of these materials, boron/epoxy composite was observed to have higher …
ICS promises to be a unique platform for knowledge sharing, networking, and exploring the latest advancements in composite materials internationally, bringing people together to do business. The International Composites Summit is renowned as the only solely focused UK event for professionals involved in the composites industry.
The effect of particular parameters on the energy absorption and peak stress of composite material, under crushing load, is summarised below. 4.4.1.1. Lay-up. With the same chamfer angle, the UD specimen [0 ]8 shows the highest experimentally 72 W. Tan et al. (a) Exp Num 80 Energy Dissipation (J) Stress (MPa) 60 40 20 0 0 0.1 0.2 Strain (-) 3 ...
To investigate the crashworthiness of hybrid composite tubes, two types of aluminum-composite hybrid tubes and one type of pure braided composite tubes were subjected to impact testing. The two types of hybrid tubes were made from aluminum inner tubes with either carbon/epoxy prepreg outer tubes or outer tubes of braided carbon …
Energy Absorption and Failure Modes of Different Composite Open-Section Crush Elements under Axial Crushing Loading. by. Xulong Xi. 1,2, Pu Xue. 1, …
Design a composite joint connecting a composite panel to a metallic plate attachment. Refer to the schematic in figure 2. For this joint we only design the bolts for the composite panel. We assume that the metallic attachment has adequate strength. The composite panel is made from [O/+45/9OIs AS/E.
This paper presents the progressive crushing performance of composite tubes with varied fibre architecture. The effect of lay-up configuration and influence of percentage of unidirectional (UD) and woven fabric (WF) fibre architectures on the specific energy absorption (SEA) is investigated using experiments. Composite tubes with …
Parametric analysis of composite sinusoidal specimens under quasi-static crushing - Volume 122 Issue 1254. 22 August 2024: Due to technical disruption, we are experiencing some delays to publication. We are working to restore services and apologise for the inconvenience. ... Journal of Composite Materials, Vol. 53, Issue. 16, …
Composite materials are recognized as being effi- ... occur during progressive crushing of composite tubes. Also plates can be easily produced with consistently high quality. The CCF specimen ...
DOI: 10.1016/jpstruct.2019.111531 Corpus ID: 210512602; Development of a numerical material model for axial crushing mechanical characterization of woven CFRP composites @article{Liu2019DevelopmentOA, title={Development of a numerical material model for axial crushing mechanical characterization of woven …
Reference: Abbott, Richard. Analysis and Design of Composite and Metallic Flight Vehicle Structures 3 Edition, 2019 This section is taken largely from ( MIL-HDBK-17F Vol 3, 2002). Section 9.3 at the back of this reference has some excellent general guidelines for composite laminate design. Where the guidelines are obsolete or incorrect I have not …
Thermoplastic composite materials are well suited for the development and design of energy absorbing lightweight structures. In this work, the damage initiation and failure phenomena of half-circle and full-circle tubular specimens, made of a novel mat reinforced thermoplastic composite material under axial dynamic crushing is …
Dynamic crushing of composites is studied proposing an optimised experimental design: flat, millimetre-scale specimens reduce geometrical influences and …
Different particle size of waste epoxy micro-spheres (100–600 μm) with core-shell structure is obtained through simple mechanical crushing and boron nitride surface treatment. By using smattering epoxy monomer as an adhesive, an eco-friendly composite material with a "brick-wall structure" can be formed.
Composite tubes can be reinforced with continuous fibers. When such tubes are subjected to crushing loads, the response is complex and depends on interaction between the different mechanisms that control the crushing process.
Section snippets Materials and methods. This section presents the methods for material preparation and dynamic crushing test. A finite element model was developed based on the characteristics of real tests and a method to assess the performance of various composite configurations was proposed.
1. Introduction. Thin-walled structures made of composite materials have been widely used as energy absorbers in many engineering fields including automotive and aerospace due to their superior performance in improving the crashworthiness of structures during impact and crash situations and lightweight characteristics [1].Energy absorber …
The significant potential of composite materials as highly effective energy absorbers has contributed to their increasing usage in the aerospace, automotive, and railway industries. ... the physics of composites crushing is very complicated because composites absorb crash energy through a combination of interlaminar (delamination) …
A series of dynamic crushing tests were conducted for three types of composite tubes under the same crushing velocity of 1.944 m/s, including carbon fiber …
Abstract Components in composite materials are progressively replacing metals for crashworthy applications in the automotive, railway and aeronautical industries. The numerical simulation of the crushing process for composite structures is a recent research area. Due to the complex mechanical behaviour of advanced composites, the …
To reveal the energy absorbing mechanism of thin-walled circular tubes made of a T700/3234 composite, tests were first conducted to find its material properties, and then quasi-static axial crushing tests were performed to determine the failure modes and were measured by material performance tests, and the damage mechanism and …
In this paper, a three-dimensional damage model is presented, which accurately represents the behaviour of composite laminates under crush loading. Both …
For metallic materials, capability of energy absorption mainly comes from plastic deformation of structures, while composites show higher SEA values due to fragmentation and destruction of materials [14]. During the crushing process of composite structures, materials fail through continuous fracture propagation and …
Guangdong Hangyu Composite Material Technology Co. Ltd. supplied the fiber/epoxy prepregs used in our study. Fig. 1 presents a diagram of the reinforced fabrics used: carbon/carbon (CC), carbon/glass (C0G90), glass/carbon (C90G0) and glass/glass (GG). C0G90 and C90G0 represent carbon/glass hybrid preforms fabricated with the …
Two-layer finite element model for axial crushing of composite tube. ... c = ∫ 0 L c SCS ds L c = SCS mean = P mean ρ A where E total, M c, L c are the total energy absorbed during crush, the mass of the crushed material, and the final crushing length, respectively. The crushing load efficiency is defined by: (8) ...
A recently developed material model for orthotropic composites is demonstrated by modeling an energy absorbing crush event used in the development …
The designable structures of composite materials extend the functional applications of composite materials which have been primary materials for lightweight structures. ... The crushing forces of composite tubes shown the similar tendency corresponding to the deformations during axial impacting. However, the peak crushing …