The Beer Can as a Shock Absorber

1973 ◽  
Vol 95 (4) ◽  
pp. 224-226 ◽  
Author(s):  
P. H. Wirsching ◽  
R. C. Slater
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Energy Absorption ◽  
Impact Velocity ◽  
Shock Absorber ◽  
Dynamic Testing ◽  
Longitudinal Axis ◽  
Total Force ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior

Static and dynamic testing performed on steel beer and soda cans has indicated that the cans, when loaded along the longitudinal axis, possess mechanical properties ideal for shock absorption. The static and dynamic mechanical behavior of the 12 oz steel cans is presented. It was shown that the energy absorption capability of the cans is not strongly dependent upon impact velocity. Moreover it was shown that pneumatic forces caused by air entrapped in the cans contribute significantly to the total force in the can during impact.

Mechanical Properties and Dynamic Mechanical Behavior for Long Aramid Fiber Reinforced Impact Polypropylene Copolymer

2012 ◽  
Vol 591-593 ◽  
pp. 1079-1082 ◽  
Author(s):  
Hao Tan ◽  
Hong Sheng Tan ◽  
Xin Lei Tang ◽  
Yan Gang Wang ◽  
Li Ping Li
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Aramid Fiber ◽  
Fiber Reinforced ◽  
Aramid Fibers ◽  
Dynamic Mechanical ◽  
Composite Deformation ◽  
Dynamic Mechanical Behavior ◽  
Single Screw Extruder ◽  
Impact Polypropylene Copolymer

Composites of continuous aramid fiber reinforced impact polypropylene copolymer (IPC) were prepared using a cross-head impregnation mold by self-design fixed on a single screw extruder, and pelleted by a pelleter for injection molding to prepare testing specimens. The mechanical properties of long aramid fibers reinforced impact polypropylene copolymer (IPC) composites were studied. Micrographs of fracture surface of tensile specimens and dynamic mechanical behavior for the composites were analyzed by scanning electron microscope (SEM) and dynamic mechanical analyzer (DMA). The results of experiments show that, the tensile and flexural strengths increased obviously with the aramid fibers content in the composites. SEM results show the compatibility between the aramid fiber and matrix is very poor. The results of the dynamic mechanical behavior of long aramid fibers reinforced IPC composites show that the composite deformation resistance and glass transition temperature increased evidently with the addition of aramid fibers.

scholarly journals Experimental and Constitutive Model Study on Dynamic Mechanical Behavior of Metal Rubber under High-Speed Impact Loading

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Youchun Zou ◽  
Chao Xiong ◽  
Junhui Yin ◽  
Kaibo Cui ◽  
Xiujie Zhu ◽  
...  
Keyword(s):  
Constitutive Model ◽  
Mechanical Behavior ◽  
Energy Absorption ◽  
Split Hopkinson Pressure Bar ◽  
High Energy ◽  
Property A ◽  
Stress Strain ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior ◽  
Metal Rubber

The development of lightweight, impact-resistant, and high energy-consuming materials is of great significance for improving the defense capabilities of military equipment. As a new type of damping material, metal rubber has demonstrated great potential for application in the field of impact protection. In this paper, the dynamic mechanical response of metal rubber under a high strain rate is studied, which provides a new idea for developing high-performance protective materials. The stress-strain curves, energy absorption performance, and wave transmission performance of metal rubber at various strain rates were investigated based on a split-Hopkinson pressure bar (SHPB) device. The dynamic stress-strain curve of metal rubber is divided into three stages: elastic stage, plastic stage, and failure stage. The optimal energy absorption efficiency is greater than 0.5, and the maximum value can reach 0.9. The wave transmittance is less than 0.01. The dynamic mechanical tests have proved that metal rubber has excellent energy absorption capacity and impact resistance property. A constitutive model based on Sherwood–Frost was established to predict the dynamic mechanical behavior of metal rubber. The results of comparison between the calculation and the experiment show that the constitutive model can accurately predict the dynamic mechanical performance of metal rubber.

Dynamic Mechanical Behavior of Hybrid Flax/Basalt Fiber Polymer Composites

2021 ◽  
pp. 305-312
Author(s):  
Arun Prasath Kanagaraj ◽  
Amuthakkannan Pandian ◽  
Veerasimman Arumugaprabu ◽  
Rajendran Deepak Joel Johnson ◽  
Vigneswaran Shanmugam ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Polymer Composites ◽  
Basalt Fiber ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior

On the dynamic mechanical behavior of poly(ethyl methacrylate) reinforced with kevlar fibers

1991 ◽  
Vol 42 (6) ◽  
pp. 1647-1657 ◽  
Author(s):  
J. L. Gómez Ribelles ◽  
J. Mañó Sebastià ◽  
R. Martí Soler ◽  
M. Monleón Pradas ◽  
A. Ribes Greus ◽  
...  
Keyword(s):  
Mechanical Behavior ◽  
Dynamic Mechanical ◽  
Ethyl Methacrylate ◽  
Dynamic Mechanical Behavior

A study on wrinkling characteristics and dynamic mechanical behavior of membrane

2011 ◽  
Vol 28 (1) ◽  
pp. 201-210 ◽  
Author(s):  
Yun-Liang Li ◽  
Ming-Yu Lu ◽  
Hui-Feng Tan ◽  
Yi-Qiu Tan
Keyword(s):  
Mechanical Behavior ◽  
Dynamic Mechanical ◽  
Dynamic Mechanical Behavior

Dynamic Strain Effects in Elastomers

1963 ◽  
Vol 36 (2) ◽  
pp. 407-421 ◽  
Author(s):  
Glenn E. Warnaka
Keyword(s):  
Elastic Modulus ◽  
Mechanical Behavior ◽  
Strain Amplitude ◽  
Loss Factor ◽  
Dynamic Strain ◽  
Dynamic Mechanical ◽  
Small Strains ◽  
Dynamic Mechanical Behavior ◽  
Elastomeric Materials ◽  
Practical Engineering

Abstract Many common elastomeric materials have two ranges of dynamic-mechanical behavior. Such materials behave as viscoelastomers at very small strains and as plastoelastomers at strains of practical engineering interest. The change from viscoelastic to plastoelastic behavior occurs at dynamic strain amplitudes of 0.001 inches per inch to 0.005 inches per inch. In the plastoelastic range, the dynamic elastic modulus decreases with increasing dynamic strain amplitude. Loss factor reaches a maximum in the plastoelastic range.

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