Finite Element Analysis and Experimental Study of an Electromagnetic Shell Part with Flow Control Forming

2013 ◽  
Vol 690-693 ◽  
pp. 2982-2989
Author(s):  
Zhi Wei Huang ◽  
Yuan Yuan Wan ◽  
Yan Bin Wang ◽  
Lu Chang Che ◽  
Chuan Lin Liu ◽  
...  
Keyword(s):  
Flow Control ◽  
Room Temperature ◽  
Steel Sheet ◽  
Equivalent Stress ◽  
Metal Flow ◽  
Practical Method ◽  
Element Analysis ◽  
One Step ◽  
Simulation Results ◽  
Shell Part

In this paper, an electromagnetic shell part was studied with the design of die, simulation and the flow control forming (FCF) method. The important technology of FCF was the design of cavity die to control metal flow. The simulation results indicate that pyramidal faces of cavity die exerted a significant influence on qualities of parts. The simulation results also revealed that the effective stresses of the sheet were inhomogeneous and the distributions of the equivalent stress were lamellar with obvious gradients. Experimental results show that steel sheet (08Al) could be formed in one step into intricate shapes at room temperature. This confirmed that FCF is a safe, clean and practical method for the near net forming of parts.

Finite Element Analysis of Rolling Process for Pilger Mill

2014 ◽  
Vol 881-883 ◽  
pp. 1420-1423 ◽  
Author(s):  
Ning An ◽  
Liu Hai
Keyword(s):  
Rolling Force ◽  
Equivalent Stress ◽  
Rolling Process ◽  
Equivalent Strain ◽  
Roll Pass ◽  
Element Analysis ◽  
Pipe Rolling ◽  
Cold Rolled ◽  
Simulation Results ◽  
Deform 3D

For the simulation of cold rolled 20Cr steel pipe rolling process the DEFORM-3D being used, the simulation results include the equivalent stress, equivalent strain and rolling force distribution in deformation zone. The stress state of the pipe reducer section is analyzed, analysis shows that the simulation result is approximate the theoretical calculation. The simulation result shows the roll pass and openning effect on the rolling pipe. A view put forward is to compare the simulation results with the actual production and find out their differences. A proposal is made to establish a corresponding database based on simulation and production data.

Synthesis of selective biodegradable amidoxime chitosan for absorption of Th(IV) and U(VI) ions in solution

2021 ◽  
Vol 109 (5) ◽  
pp. 343-355
Author(s):  
Jiaju Ma ◽  
Zhiwei Lei ◽  
Yun Zhou ◽  
Tianhao Dong ◽  
Peizhuo Hu ◽  
...  
Keyword(s):  
Room Temperature ◽  
Adsorption Process ◽  
Crosslinking Agent ◽  
Post Treatment ◽  
Batch Adsorption ◽  
Element Analysis ◽  
One Step ◽  
Ft Ir ◽  
Harmful Substances

Abstract Radionuclide extraction from wastewater is a long-term process, in which the study on the reuse and decomposition of adsorbents provides the ability to complete the post-treatment after adsorption. Herein, A novel biodegradable amidoxime chitosan has been synthesized through one-step without crosslinking agent and characterized by FT-IR, SEM, XPS, TGA and element analysis. The batch adsorption experiments of U(VI) and Th(IV) on AO-CTS adsorbent were studied and maximum adsorption of U(VI) and Th(IV) were 97 and 56 mg/g, respectively. The U(VI) and Th(Ⅳ) can be effectively desorbed from the AO-CTS materials at low acidity, The AO-CTS can be reused 6 times without reducing absorbency for U(VI) and Th(Ⅳ). When finish the adsorption process, the AO-CTS can be degraded by lysozyme at room temperature, there were no toxic or harmful substances are produced.

Tensile strength of Z-pinned laminates in RTD and hot-wet environment

2017 ◽  
Vol 24 (1) ◽  
pp. 101-109
Author(s):  
Chenghu Li ◽  
Wei Guo ◽  
Zhe Wu
Keyword(s):  
Tensile Strength ◽  
Room Temperature ◽  
Simulation Analysis ◽  
Simulation Method ◽  
Fiber Bundles ◽  
Element Analysis ◽  
Nonlinear Springs ◽  
The Finite Element Analysis ◽  
Simulation Results

AbstractExperiments and simulation analysis for tensile strength of Z-pinned laminates were conducted in both room temperature and dry and hot-wet environments. The results of the experiments show that the fracture of [0]6 specimen with Z-pins was longitudinally torn, and there was a row of Z-pins at the fracture of [(±45)/(0,90)]2S specimen with Z-pins. It could be observed that the hot-wet effect on the tensile strength of the Z-pinned laminates increased with percentage of 0-direction fibers decreasing in the laminates from the experiments of the unidirectional tape laminates and the woven cloth laminates. When the volume content of Z-pin increased, the hot-wet effect on tensile strength of Z-pinned [45/0/-45/90]2S laminates with Z-pins would become smaller and smaller. The simulation method of the hot-wet effect on tensile strength of the laminates was combined with the experiment and the finite element analysis. It used 14 nonlinear springs to simulate the longitudinal tearing of [0]6 specimen with Z-pins. The simulation results showed that Z-pin played a role of fulcrum, and because of the lever principle, the fiber bundles were torn at both tips in resin-rich area.

Microimprinting Simulation of Anti-Bacterial Pattern on Stainless Steel Sheet

2014 ◽  
Vol 931-932 ◽  
pp. 349-353
Author(s):  
Pramote Koowattanasuchat ◽  
Numpon Mahayotsanun
Keyword(s):  
Grain Size ◽  
Stainless Steel ◽  
Friction Coefficient ◽  
Steel Sheet ◽  
Grain Size Effect ◽  
Stainless Steel Sheet ◽  
Element Analysis ◽  
Steel Sheets ◽  
Grain Sizes ◽  
Simulation Results

The aim of this study was to investigate the effects of important factors in microimprinting, which could be used to create the anti-bacterial pattern on stainless steel sheets. The microimprinting process was modeled and simulated by using finite element analysis (FEA). The following factors were considered: forming steps, forming velocity, grain size, and friction coefficient. The simulation results showed that two-step forming helped reduce peak errors. Increasing forming velocity and friction coefficient tended to increase peak errors. The grain size effect was not noticeable because the selected grain sizes were much larger than that of the micro feature.

The Effect of Underfill and Underfill Delamination on the Thermal Stress in Flip-Chip Solder Joints

1998 ◽  
Vol 120 (4) ◽  
pp. 342-348 ◽  
Author(s):  
S. Rzepka ◽  
M. A. Korhonen ◽  
E. Meusel ◽  
C.-Y. Li
Keyword(s):  
Finite Element Analysis ◽  
Room Temperature ◽  
Flip Chip ◽  
Solder Joints ◽  
Element Analysis ◽  
Ultimate Failure ◽  
Simulation Results ◽  
Substrate Surfaces ◽  
Major Crack ◽  
Perfect Adhesion

The stresses occurring in the solder joints during thermal loads have been studied by finite element analysis. Besides the cases of no underfill and perfect adhesion, underfill delaminations at the interfaces to the solder, to the chip, and to the substrate surfaces, respectively, have been considered. The simulation results indicate that rapid failing of the flip-chip modules due to delamination can be prevented effectively by using an underfill that has a high Young’s modulus at room temperature (even 20 GPa are not too high) and a CTE slightly lower than solder. Since the ultimate failure is always caused by growing of a major crack, the damage integral concept is valid for lifetime estimations even in the case of FC modules with underfill.

A Study on the Rearrangement of Dialkyl 1-Aryl-1-hydroxymethylphosphonates to Benzyl Phosphates

2020 ◽  
Vol 24 (4) ◽  
pp. 465-471 ◽  
Author(s):  
Zita Rádai ◽  
Réka Szabó ◽  
Áron Szigetvári ◽  
Nóra Zsuzsa Kiss ◽  
Zoltán Mucsi ◽  
...  
Keyword(s):  
Quantum Chemical ◽  
Room Temperature ◽  
Phase Transfer ◽  
One Pot ◽  
Substrate Dependence ◽  
Triethylbenzylammonium Chloride ◽  
One Step ◽  
The Pudovik Reaction ◽  
The One ◽  
Solid Liquid

The phospha-Brook rearrangement of dialkyl 1-aryl-1-hydroxymethylphosphonates (HPs) to the corresponding benzyl phosphates (BPs) has been elaborated under solid-liquid phase transfer catalytic conditions. The best procedure involved the use of triethylbenzylammonium chloride as the catalyst and Cs2CO3 as the base in acetonitrile as the solvent at room temperature. The substrate dependence of the rearrangement has been studied, and the mechanism of the transformation under discussion was explored by quantum chemical calculations. The key intermediate is an oxaphosphirane. The one-pot version starting with the Pudovik reaction has also been developed. The conditions of this tandem transformation were the same, as those for the one-step HP→BP conversion.

A Simple Synthesis of the Anticancer Drug Altretamine

2020 ◽  
Vol 17 (8) ◽  
pp. 628-630
Author(s):  
Vu Binh Duong ◽  
Pham Van Hien ◽  
Tran Thai Ngoc ◽  
Phan Dinh Chau ◽  
Tran Khac Vu
Keyword(s):  
Aqueous Solution ◽  
Anticancer Drug ◽  
Potassium Hydroxide ◽  
Large Scale ◽  
Synthesis Method ◽  
Practical Method ◽  
Cyanuric Chloride ◽  
Simple Synthesis ◽  
High Yield ◽  
One Step

A simple and practical method for the synthesis on a large scale of altretamine (1), a wellknown antitumor drug, has been successfully developed. The synthesis method involves the conversion of cyanuric chloride (2) into altretamine (1) by dimethylamination of 2 with an aqueous solution of 40% dimethylamine and potassium hydroxide in 1, -dioxan 4in one step to give altretamine (1) in high yield.

scholarly journals Practical Synthesis of 2-Iodosobenzoic Acid (IBA) without Contamination by Hazardous 2-Iodoxybenzoic Acid (IBX) under Mild Conditions

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1897
Author(s):  
Hideyasu China ◽  
Nami Kageyama ◽  
Hotaka Yatabe ◽  
Naoko Takenaga ◽  
Toshifumi Dohi
Keyword(s):  
Aqueous Solution ◽  
Room Temperature ◽  
Practical Method ◽  
Hypervalent Iodine ◽  
Mild Conditions ◽  
Sequential Procedures ◽  
Iodine Compounds ◽  
Practical Synthesis ◽  
Iodosobenzoic Acid ◽  
Lower Temperature

We report a convenient and practical method for the preparation of nonexplosive cyclic hypervalent iodine(III) oxidants as efficient organocatalysts and reagents for various reactions using Oxone® in aqueous solution under mild conditions at room temperature. The thus obtained 2-iodosobenzoic acids (IBAs) could be used as precursors of other cyclic organoiodine(III) derivatives by the solvolytic derivatization of the hydroxy group under mild conditions of 80 °C or lower temperature. These sequential procedures are highly reliable to selectively afford cyclic hypervalent iodine compounds in excellent yields without contamination by hazardous pentavalent iodine(III) compound.

Sign in / Sign up

Export Citation Format

Share Document