Visualizing curing process inside polymers
Tools. The curing process of polymer materials and structures has a crucial influence on their final properties. However, existing methods are only capable of characterizing their time-resolved information. To comprehensively reveal curing behaviors inside polymers, we report a method that combines optical coherence tomography and …
Design and Development of Improved Methods of …
Home. Ecological and Health Effects of Building Materials. Chapter. Design and Development of Improved Methods of Curing of Bricks During Manufacturing …
Process Modeling of Composite Materials: Residual Stress Development …
In a companion paper [1] a process model was developed for investigation of residual stress development during autoclave or hot press processing of thermosetting polymer matrix composites. Several material property characterization studies are re quired as input to this model. The present paper summarizes the results of the character ization …
Process development method for high-speed gluing and a …
The procedure models refer to existing analytical and numerical calculation methods for the design of adhesive bonds, which, however, are aimed at determining the maximum achievable strength of the adhesive at the end of the curing process. The curing time and the curing process of the bonds are determined, if any, only in the late …
(PDF) Investigating the effect of curing methods on …
Concrete. Conference Paper PDF Available. Investigating the effect of curing methods on the strength properties of concrete. August 2021. Conference: West Africa Built Environment Research...
Development of Direct /Curing Process for 3D …
3D structural electronics is a new paradigm in fabricating electronics with high design complexity. Basically, manufacturing of 3D structural electronics consists of several processes: structure building, wire creation, and pick-and-place of electrical components. In this work, a 3D structure was built in a commercial AM machine, and conductive wires …
Curing Methods for Advanced Polymer Composites
The dominant curing process today for advanced polymer composites is still based on thermal curing using a range of thermal heating processes, in which the oven or autoclave is widely used. Because polymers and their composites have low thermal conductivity (epoxy resin thermal conductivity at 25 °C: 0.19 W/m K), conventional thermal curing ...
Cured Meats
Cured meat color. Cured meats, such as bacon and ham, have a distinctive pink color produced by chemical reactions between sodium nitrite and myoglobin. The curing process begins by infusing fresh meat with a sodium nitrite solution where it is quickly converted to nitric oxide (NO). Nitric oxide binds to myoglobin and changes fresh meat …
Nitrites in Cured Meats, Health Risk Issues, Alternatives to …
Despite being lost in time, the curing process is thought to be evolved from salt preservation methods as early as 3000 B.C. . Among the various additives used in meat curing, nitrite salt is very significant. ... The use of organic acid to cured meat enhances the color development process while inhibiting microbiological growth. Lactate ...
Residual stress development in curing processes: Material
Request PDF | On Jan 1, 2023, David Lindeman and others published Residual stress development in curing processes: Material characterization and modeling | Find, read and cite all the research you ...
(PDF) Curing of Concrete: A Review
Curing allows continuous hydration of. cement and consequently continuous gain in the strength, once curing stops strength gain of the concrete also stops. Proper moisture conditions are c ritical ...
Residual stress development in curing processes: Material
Adhesive curing processes and material property evolution. The curing process in structural adhesives is commonly initiated by raising the temperature of the adhesive to a level that promotes the curing reaction. In some cases, however, the conversion process is initiated through exposure to ultraviolet (UV) light or water [3]. …
Development and performance analysis of out-of-autoclave curing process …
The orthogonal experimental method was applied to optimize three process parameters, including the heating rate, curing temperature, and holding time, for the high-pressure microwave curing of ...
Curing of concrete: Important Steps for Durable Structures: …
Curing is the process of maintaining the correct moisture content in concrete after placement, allowing proper hydration of the cement. This chemical …
Automated concrete curing and assessment of strength
The process of curing facilitates the cement hydration reaction that occurs between water and cement, resulting in the formation of calcium silicate hydrate (CSH) gel. ... strength of the hardened concrete is proportional to its internal temperature–time history during the early stages of development [1]. The detail of this process is ...
Self-curing concrete: a state-of-the-art review
Present study reviews viability of producing low and high-strength self-curing concrete with meticulous use of various self-curing agents. The use of curing …
Effect of residual-stress evolution during curing process on …
A multi-physics analysis was performed to model the evolution of residual stresses in the curing process under different process and material conditions for unidirectional Glass Fiber Reinforced Polymers. ... Kim KS, Hahn HT. Residual stress development during processing of graphite/epoxy composites. Composites Sci Technol …
The epoxy resin system: function and role of curing agents
The curing agents have a significant impact in determining the rate of reaction, curing cycle, and final characteristics of the processed product [1,2,3].Curing agents are composed of compounds containing active hydrogen and its derivatives, ionic and cationic inhibitors, and reactive cross-agents that are typically of equal weight [4, …
Residual stress development in curing processes: …
Residual stress development in curing processes: Material characterization and modeling - ScienceDirect. Advances in Structural Adhesive Bonding (Second …
Pultrusion manufacturing process development by computational modelling
A comparison between cure profiles in points A and B, indicated in Fig. 1 (b) and (c), obtained using FDM and FEM proposed models, with data from Ref. [15] is shown in Fig. 2. Temperature peak, mean degree of cure in the exit section, and standard deviation of the degree of cure, in the same section, are compared in Table 4. As …
Process Modeling of Composite Materials: Residual Stress Development …
A process model has been developed which can be used to predict the residual stress history during the curing of composite laminates. This model includes the effects of chemical and thermal strains and assumes the material to exhibit linear, viscoelastic behavior. ... T2 - Residual Stress Development during Cure. Part I. Model Formulation. …
The influence of curing regimes on hydration, …
The curing process of cement-based materials involves the application of appropriate moisture content and temperature during the placement and subsequent time period to achieve the required ... introduced the concept of concrete maturity, which emphasized the significance of curing age and temperature to the development of …
A review on recent development and application of radiation curing …
The present review aims at advancement in the area of radiation curing technology. The study begins with an overview of radiation curing technology development, followed by the mechanism involved in curing. For a better understanding of the process, types of radiation curing methods are also explained. Moreover, the paper …
Process Modeling for Strain Evolution during Autoclave Composite Cure
Sreekantamurthy et al. developed cure process models to model the laminate cure responses with reference to the physics of the curing process using the cure simulation ... D.G.: Development of an autoclave cure cycle with cooling and reheating steps for thick thermoset composite laminates. J. Compos. Mater. 31, …
Steam Curing of Concrete: Methods, and Advantages
This curing process is performed with autoclaves at a temperature range of 325 0 F to 375 0 F and a pressure range of 80 to 170psi. The above-mentioned temperature and pressure-controlled environment change the chemistry of the hydration process of the concrete. The concrete produced by this method ought to have:
Design and development of a new peanut curing process …
The conventional drying system designed in the 1960's is still being used in the processing of the peanuts today (Figure 1). The objectives of this paper is to design and develop a new peanut curing process for West Texas. KW - Curing process. KW - Peanut. KW - …
Effect of curing regime on the strength development and …
In fact, autoclaved curing at high temperature not only showed negative impact on the properties of precast concrete element, but also accounted for a large amount of energy consumption, and the energy consumption of curing process of high and ultra-high strength concrete in production accounts for 80.6%–97.7% of the total production …
Self-curing concrete: a state-of-the-art review | Innovative
Controlling the curing process is challenging due to the limited capabilities of conventional curing materials, which can only absorb and release water. Additionally, the uniform distribution of these materials within concrete makes it difficult to achieve modifications. ... The influence of initial water curing on the strength development of ...
Design and Optimization of Manufacturing Process of …
As mentioned earlier, the curing process for epoxy resins needs external heating, and DoC is a function of temperature cycle. Figure 1 shows the evolution of degree of cure for isothermal cure process at various temperature of epoxy 8552. As the applied temperature increases, the cure process accelerates, leading to a higher degree of …
Modelling the dynamic development of the curing process …
The drying of waterborne acrylic-alkyd hybrids is a complicated process, involving both curing of the alkyd phase and evolution of the overall morphology of the film. Understanding this drying process is of great importance in practical application of these hybrids, where the physical properties of the film are dictated by the film microstructure.