Energy absorption characteristic of sandwich shell structure against conical and hemispherical nose projectile

2021 ◽  
Vol 258 ◽  
pp. 113396
Author(s):  
N. Khaire ◽  
Gaurav Tiwari ◽  
M.A. Iqbal
Keyword(s):  
Energy Absorption ◽  
Shell Structure ◽  
Absorption Characteristic ◽  
Sandwich Shell

An Experimental Evaluation of Energy Absorption of TRIP Steel by Small Punch Test

2016 ◽  
Vol 725 ◽  
pp. 60-65
Author(s):  
Asuka Hayashi ◽  
Takeshi Iwamoto
Keyword(s):  
Energy Absorption ◽  
Trip Steel ◽  
Dynamic Condition ◽  
High Strength ◽  
High Energy ◽  
Bending Test ◽  
Absorption Characteristic ◽  
Small Punch ◽  
Three Point Bending ◽  
Punch Test

TRIP steel possesses high strength and excellent ductility. In addition, it is possible that TRIP steel indicates high energy absorption so that TRIP steel is expected to apply to automotive members. To design the members made of TRIP steel, it is important to clarify its energy absorption characteristic at various deformation rates. In the previous study, the energy absorption characteristic of TRIP steel is evaluated by J-integral under quasi-static to dynamic condition by using a thick specimen based on ASTM standard. However, by using such thick specimens, it is difficult to conduct the three-point bending test under impact condition because of high ductility in TRIP steel. A small punch (SP) test is the experimental method which can evaluate fracture parameters such as J-integral. By using a conventional use of small specimen in the SP test, it is possible to evaluate J-integral of TRIP steel under impact deformation. In this study, energy absorption characteristic of TRIP steel is investigated by SP test under different deflection rates. Then, the relationship between the values of J-integral obtained by previously conducted three-point bending test and the SP test of TRIP steel is discussed.

Analysis and Application of the Impact Absorption Behavior of the Composite Tube

2013 ◽  
Vol 470 ◽  
pp. 510-515
Author(s):  
Zi Peng Zhang ◽  
Gui Fan Zhao ◽  
Tso Liang Teng ◽  
Yang Wang
Keyword(s):  
Energy Absorption ◽  
Absorption Characteristic ◽  
Beam Model ◽  
Velocity Signal ◽  
Composite Tube ◽  
Acceleration Signal ◽  
Displacement Signal ◽  
Drop Weight Tear Test ◽  
Composite Energy ◽  
The Impact

Composite tube is one new kind of multi-material shell structures. It has both of metal and composite energy absorption advantage. In order to find the energy absorption characteristic of composite tube and put it into use, the Drop-Weight Tear Test (DWTT) was carried out. The LD2Y aluminum was chosen as the inner metal material which was wrapped fiberglass epoxy composite outside. During the test, the displacement signal and velocity signal, acceleration signal were got by piezoelectric acceleration transducer. Furthermore, the DWTT test of the composite tube was simulated in LS-DYNA, and proved the validity of the model by comparing the simulation results with the experiment results. We established the vehicle front longitudinal beam model with the material type of the composite tube, and carried out the simulations of whole car collisions in LS-DYNA according to FMVSS 208. Through the analysis of occupant head injury got from the simulations, we got the result that using the composite tube material could not only elevate the cars safety but also reduce front longitudinal beam weight effectively.

Deformation and Energy Absorption Characteristics of Biomass Foam Composites

2014 ◽  
Vol 925 ◽  
pp. 268-272 ◽  
Author(s):  
Mohd Azizan Nur Azni ◽  
Adnan Arzuria Sinar ◽  
Firuz Zainuddin ◽  
A.G. Supri
Keyword(s):  
Energy Absorption ◽  
Curcuma Longa ◽  
Testing Machine ◽  
Strain Curve ◽  
Absorption Characteristic ◽  
Lawsonia Inermis ◽  
Stress Strain ◽  
Pu Foam ◽  
Natural Oil ◽  
Band Saw

Deformation and energy absorption characteristic of biomass foam composites are important in crashwortyness efficiency. The type of foam that had been used in this research is polyurethane (PU) foam with plant-based filler which are turmeric powder (Curcuma Longa), charcoal powder, henna powder (Lawsonia inermis) and lemon grass powder (Cymbopogon) that give natural color to the composites. The percentages of filler was specified to 10% by weight. PU foam was prepared by reaction of natural oil polyol and isocyanate with a ratio of 1 to 1.1 by weight. The mixture was stirred with 1500 rpm and was poured into the mould when mixture starting to expand. Band saw was used to cut the sample with desired dimension. The characterization of filler was done using Fourier Transform Infrared Spectroscopy (FTIR). Compression was tested using Ultimate Testing Machine (UTM) and scale to weigh the sample. Composites with henna filler have ductile like behavior that proved in stress-strain curved that show the rough line in the graph. Other composites have rigid like behavior which have a smooth line in a stress - strain curve.

Compressive property and energy absorption characteristic of open-cell ZA22 foams

2009 ◽  
Vol 30 (1) ◽  
pp. 87-90 ◽  
Author(s):  
Sirong Yu ◽  
Jiaan Liu ◽  
Ming Wei ◽  
Yanru Luo ◽  
Xianyong Zhu ◽  
...  
Keyword(s):  
Energy Absorption ◽  
Compressive Property ◽  
Absorption Characteristic ◽  
Open Cell

Parallelepiped Sandwich Shell - Searching for the Optimal Geometric Parameters

2014 ◽  
Vol 611 ◽  
pp. 170-174 ◽  
Author(s):  
Edward Tertel ◽  
Piotr Kuryło ◽  
Władysław Papacz
Keyword(s):  
Internal Pressure ◽  
Objective Function ◽  
Shell Structure ◽  
Geometric Parameters ◽  
Geometrical Parameters ◽  
Sandwich Shell ◽  
Optimization Constraints ◽  
Geometric Conditions

The paper presents investigations of the optimal geometric parameters for the sandwich rectangular pipe. The analyzed parallelepiped shell is loaded with uniform internal pressure. The objective function is the ratio of the shell structure mass to mass of the medium contained in the shell. The minimum of the objective function is searched. The optimization constraints are a geometric conditions relating to the dimensions of the shell, and strength requirements. The solution was obtained and the optimum geometrical parameters are presented.

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