Thermally induced stress analysis of composite/aluminum ring specimens at cryogenic temperature

Thermal buckling measurement of a laminated composite plate under a uniform temperature distribution using the digital image correlation method

“…Recently, the DIC technique has been used in engineering to measure thermal [25] and Pan et al [26] proposed an effective counter measurement [31,32]. When these structures are heated, the circular plate may buckle at a certain temperature.…”

Damage Analysis of a Type 3 Cryogenic Propellant Tank After LN2 Storage Test

“…Therefore, a Type 3 composite tank, which is lined with metal for the purpose of maintaining permeability, is generally preferred to a Type 4 tank fabricated only with composite materials. Considerable weight reduction of Type 4 tanks, however, is still of interest to many researchers through the addition of toughening materials like CNTs, elastomers, and so on, although some failures occur as shown in the case of X- 33. In previous researches, authors have been trying to characterize cryogenic behaviors of composites and adhesives for cryotank application [18][19][20], from which the resin constitution with suitable cryogenic characteristics, Type B, could be obtained. It could be concluded that it showed 7% higher strength at cryogenic temperatures than a baseline material [18].…”

“…In addition, the cryogenic performance of adhesive between composite and aluminum was influenced by means of double-lap shear tests for Type 3 application [19]. Thermo-mechanical response of metal lined composite structures was investigated using composite/aluminum ring specimens [20]. For the next step, a trial to fabricate and test a prototype of a Type 3 tank with the developed resin and aluminum liner was made because it was important to look into the problems with the developed composite during the storage of cryogenic liquids and to investigate its feasibility.…”

The Mechanical Properties Research of Stress Frame Casting under Different Solidification Conditions

“…The analysis shows that in the consecutive solidification condition, the thick rod nearby runner had coagulated at the last time, the hydrogen dissolved in liquid A357 alloy and the gas introduced at the initial filling concentrated in this position at the end of solidification. The reason of micro-cavity and regional shrinkage caused by primary Al matrix coagulated early is the inadequate feeding at the last time, this region as the first crack source caused by stress in the tensile test, the primary aluminum nearby the area of shrinkage ruptured immediately, deteriorating the mechanical properties of this region (shown in Fig.8a)[18,19] . The thick rod away from runner is at the end of the casting process in the consecutive solidification condition, the vortex and turbulent generated by initial filling impacted the sand mold and surface coat directly, easily to produce mixed defects ,playing an important influence role on the mechanical properties (shown in…”