Towards the Prediction of Sandwich Composites Durability in Severe Condition of Temperature: A New Numerical Model Describing the Influence of Material Water Content during a Fire Scenario

An advanced fire thermal model was developed to predict the evolution of the temperature and decomposition gradient across a sandwich composite structure when exposed to high temperatures (fire). This model allows the prediction of a large numbers of parameters, such as thermal expansion, gas mass storage, porosity, permeability, density, and internal pressure. The highlight of this model is that we consider, in the sandwich constituents (core and skins), additional parameters, such as changing volume porosities, other coupled constituents (as infused resin in the balsa core), and what make the main originality of the present approach: moisture content (free and bounded water). The time dependence of many parameters, i.e., among others, the combustion advancing front and mechanical properties, can be predicted in a large number of material and fire scenarios. The proposed approach was validated in the case of sandwich panels, with glass/polyester or glass/vinyl ester skins and balsa core, exposed to high temperatures up to 750 °C. The influence of water on the thermal and mechanical responses is also highlighted.

Transcending Natural Resource Management towards Clinch of Internal Security: Some Evidences from India

India is indisputably on the advancing front of progress where its hefty natural resources serve the greatest assets to reckon with. The progress of any country is directly dependent upon the quality and quantum of available natural resources with it. For a country like India having vast continentality, these natural resources are catalysts in programs associated with human development and sustainability. However, with the enormous rise of population and dwindling resource pools, the society suffers from critical disturbances in internal security across the country’s length and breadth. There exists a proven causal relationship of a significant association between shocks to natural resources and the intensity of civil conflicts in a region. The episodes resulting from a disrupted state of internal security pose a massive challenge to government functionaries inkeeping pace with worldwide socio-economic development. The obvious choice of Natural Resource Management (NRM) provides one of the promising keys to handle this menace effectively. Thepresent work explores this meticulous strategy of assuring internal security through an improved pragmatism and judicious use of natural resources in states marred with recurring incidences of chaos and human violence. The planning and monitoring of internal security with peoples’ stake depend evidently upon the technical capability of government in handling resources with a vision for Possibilism. NRM, thus, conceptualize a framework of governance where exploitation of resources and sustenance of internal security in India go hand-in-hand prudently. The paper attempts to resolve a deteriorating internal security situation by strategizing a development-cumsustainability approach to keep a large nation safe and secure.