In order to further understand the effect of solid impurities on pipeline wall during erosion,the particle impact process without fluid was extracted for specific study.The effect of multi-impact particles on the wall...In order to further understand the effect of solid impurities on pipeline wall during erosion,the particle impact process without fluid was extracted for specific study.The effect of multi-impact particles on the wall of pipeline was studied experimentally and simulated.In this experiment,an improved ejection apparatus was implemented to carry out multi-impacts non-overlapping impingement by rhombic particles made of high speed steel(W18Cr4V)on the AA6061 aluminum alloy plate through changing particle angle,incident angle,orientation angle and impact velocity.As a result,each particle's penetration depth was investigated and particles' rebound trajectory can be described through this experiment as well as surface morphology of the target material after impingement.The ductile damage criterion,shear damage criterion and MSFLD damage criterion were jointly implemented in ABAQUS/CAE software to simulate the whole process of collision which proved to be effective by getting consistent result compared with experimental data.It is found that under the condition of continuous non-overlapping impact,the target material produces a small work hardening effect in the impact area by converting kinetic energy of moving particles into internal energy of plate so as to reduce the penetration depth of each impact particle.展开更多
High-speed injection die casting is an efficient manufacturing technology for upgrading aluminum die-cast products.However,deficiencies(such as die damage in early period)due to larger load on the molding die compared...High-speed injection die casting is an efficient manufacturing technology for upgrading aluminum die-cast products.However,deficiencies(such as die damage in early period)due to larger load on the molding die compared with conventional technology have brought new challenges.In this study,the cause of damage generated in super high-speed injection was investigated by the combination of experimental observation of the dies and CAE simulation(e.g.die temperature analysis,flow analysis and thermal stress analysis).The potential countermeasures to solve the above problems were also proposed.展开更多
基金financial support from the National Natural Science Foundation of China (China, Grant No. 51874340)the Natural Science Foundation of Shandong Province (China, Grant No. ZR2018MEE004)。
文摘In order to further understand the effect of solid impurities on pipeline wall during erosion,the particle impact process without fluid was extracted for specific study.The effect of multi-impact particles on the wall of pipeline was studied experimentally and simulated.In this experiment,an improved ejection apparatus was implemented to carry out multi-impacts non-overlapping impingement by rhombic particles made of high speed steel(W18Cr4V)on the AA6061 aluminum alloy plate through changing particle angle,incident angle,orientation angle and impact velocity.As a result,each particle's penetration depth was investigated and particles' rebound trajectory can be described through this experiment as well as surface morphology of the target material after impingement.The ductile damage criterion,shear damage criterion and MSFLD damage criterion were jointly implemented in ABAQUS/CAE software to simulate the whole process of collision which proved to be effective by getting consistent result compared with experimental data.It is found that under the condition of continuous non-overlapping impact,the target material produces a small work hardening effect in the impact area by converting kinetic energy of moving particles into internal energy of plate so as to reduce the penetration depth of each impact particle.
文摘High-speed injection die casting is an efficient manufacturing technology for upgrading aluminum die-cast products.However,deficiencies(such as die damage in early period)due to larger load on the molding die compared with conventional technology have brought new challenges.In this study,the cause of damage generated in super high-speed injection was investigated by the combination of experimental observation of the dies and CAE simulation(e.g.die temperature analysis,flow analysis and thermal stress analysis).The potential countermeasures to solve the above problems were also proposed.
