Testing of Composite Material for Transport Tanks for LNG

2019 ◽  
Vol 809 ◽  
pp. 625-629
Author(s):  
Philipp Werner Kutz ◽  
Jan Werner ◽  
Frank Otremba
Keyword(s):  
Numerical Models ◽  
Ambient Air ◽  
Insulation Material ◽  
Combustion Engines ◽  
Glass Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic ◽  
Steel Tanks ◽  
Cryogenic Conditions

To reduce the emission of carbondyoxide (CO2) of combustion engines, liquefied naturalgas (LNG) is used as an alternative fuel. LNG is transported via truck, ship or railway for longdistances. Double walled stainless steel tanks are used for transportation, which are heavy and expensive.The vacuum insulation between the two walled structure ensures that the LNG stays liquid overthe transportation time (boiling point of LNG: −162 °C). This causes a high temperature differencebetween the transported good and the ambient air. A simplified tank construction is used to reduce the weight and price of the tank. Instead of stainlesssteel, glass fiber reinforced plastic (GFRP) is used. The designed is changed to a single walledconstruction with a solid insulation material outside on the GFRP structure. Goal of this work is the characterization of a suitable insulation material and configuration as wellas the analysis of the mechanical properties of GFRP under cryogenic conditions. Several experimentsare carried out. Numerical models of these experiments can then be used for parameter studies.

An Experimental Characterization of the Failure Mechanisms Activated in GFRP Composites

2007 ◽  
Author(s):  
Timothy M. Briggs ◽  
M. Ramulu
Keyword(s):  
Failure Mechanisms ◽  
Elastic Behavior ◽  
Fiber Distribution ◽  
Gfrp Composites ◽  
Fiber Volume ◽  
Glass Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic ◽  
Material Systems

The static, flexural responses of two Glass Fiber Reinforced Plastic (GFRP) — SMC and Preform — material systems of varying fiber volume fractions were investigated. Failure mechanisms activated upon loading have been characterized through the use of numerical modeling during the damage progression. Both material systems were consolidated with a discontinuous, randomly oriented fiber distribution to give a quasi-isotropic, elastic behavior within the fiber distribution plane. Damage evolved and energy absorbed at each stage of failure is critical to the understanding of the progressive nature and the materials ability to mechanically store and dissipate energy. Preliminary experimental results show that the progressive nature of the damage is found to be consistent with the load redistribution at each stage.

The Importance of Material Structure in the Laser Cutting of Glass Fiber Reinforced Plastic Composites

1995 ◽  
Vol 117 (1) ◽  
pp. 133-138 ◽  
Author(s):  
G. Caprino ◽  
V. Tagliaferri ◽  
L. Covelli
Keyword(s):  
Experimental Data ◽  
Glass Fiber ◽  
Laser Cutting ◽  
Material Structure ◽  
Fiber Reinforced ◽  
Fiber Volume ◽  
Glass Fiber Reinforced Plastic ◽  
Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Reinforced Plastic

A previously proposed micromechanical formula, aiming to predict the vaporization energy Qv of composite materials as a function of fiber and matrix properties and fiber volume ratio, was assessed. The experimental data, obtained on glass fiber reinforced plastic panels with different fiber contents cut by a medium power CO2 cw laser, were treated according to a procedure previously suggested, in order to evaluate Qv. An excellent agreement was found between experimental and theoretical Qv values. Theory was then used to predict the response to laser cutting of a composite material with a fiber content varying along the thickness. The theoretical predictions indicated that, in this case, the interpretation of the experimental results may be misleading, bringing to errors in the evaluation of the material thermal properties, or in the prediction of the kerf depth. Some experimental data were obtained, confirming the theoretical findings.

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