Janitha Jeewantha

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• Doctor of Philosophy
• Research Fellow at University of Southern Queensland

Type IV Composite overwrapped pressure vessels (COPVs) are commonly used in high-pressure environments such as aerospace, automotive, and industrial sectors. The COPV Type IV vessels are characterized by their non-metallic liner, which is surrounded by composite materials, leading to significant reductions in weight and enhanced storage capacity. T...

Shape-memory polymers (SMPs) are smart materials that can change shape upon an external stimulus. This phenomenon is called the shape memory effect (SME), which is caused by entropy change due to rapid molecular motion in the polymer segments. Due to the inherently weak thermomechanical properties, use of SMPs is limited in many engineering applica...

Resin anchored rock bolts are widely used in the construction and mining industries to support and reinforce underground roadways and openings. However, increasing the depth of underground openings, particularly in coal mines, has presented a challenge for ground control designers due to the rise in geothermal heat and coal seam combustion. This st...

Rapidly increasing engineering innovations have contributed invaluable new technologies to the biomedical field since the mid-20th century. This thesis is devoted to another vital development in the biomedical field with the invention of shape memory polymer (SMP) orthosis and lower limb fracture fixators. SMP is a smart material that can deform te...

This paper presents the drying behavior of fresh dates at three ripeness stages (khalal, rutab, and tamr) in three drying techniques, namely, direct sun drying (DSD), greenhouse-like solar drying (GSD), and indirect convective solar drying (ISD) and validated with drying models. The experimental data was fitted to 11 thin-layer drying models to ide...

The IESL QLD Chapter hosted the Inaugural Best Research Engineer of the Year Queensland 2023 competition yesterday at the Engineers Australia Auditorium Brisbane. The event attracted approximately 80 attendees from various sectors, including industry, research institutions, and universities. During the competition, eight presenters showcased their...

The exciting shape memorizing ability of shape memory polymer composites (SMPCs) has attracted the interest of researchers catering to the needs of modern constructions. As well as outer space related applications, SMPCs can be used effectively in civil construction techniques. SMPC integrated structures have the capability to deform into a compact...

Shape memory polymer (SMP) is a smart material that can respond to external stimuli and recover its permanent shape after being programmed. Researchers have been interested in SMPs for invasive biomedical applications, but there are many opportunities for non-invasive applications. Thus, in this study, a novel hybrid SMP nanocomposite smart plaster...

The unique shape memorizing ability of shape memory polymers (SMPs) and their fibre reinforced composites have offered the prospect of remedying challenging, unsolved engineering applications. Interestingly, research integrating deformable shape memory polymer composites (SMPCs) in prefabricated modular constructions, deployable outer space structu...

5th annual Center for Future Material (CFM) poster competition

Shape memory polymers (SMPs) are smart materials that can alter their shape from a temporary shape to a permanent shape upon external stimuli. This unique property of SMP has shown enormous potential and breakthrough discoveries in biomedical engineering. A significant number of SMP based research publications in the recent past have demonstrated t...

Shape memory polymer (SMP) materials have the capacity to undergo large deformations imposed by mechanical loading, hold a temporary shape, and then recover their original shape upon exposure to a particular external stimulus. The fiber reinforced shape memory polymer composites (SMPCs) with enhanced structural performances give a boost to breakthr...

Fall-related injuries and road accidents often demand orthopaedic emergency care and management in hospitals. Early and effective fracture treatment immobilisation techniques are essential for stabilising the musculoskeletal system of the patient. During past decades, shape memory polymers (SMPs) have rapidly been developed and they have exhibited...

Shape memory polymers (SMPs) are extensively researched smart materials with a high potential for biomedical, space, flexible electronics, and soft robotic applications. The inherently weak mechanical properties of SMPs adversely affect and limits their use in delicate applications. Extensive research has been done with fibre reinforced shape memor...

Shape memory polymers (SMPs) are an emerging class of polymers that can memorise temporary shapes and recover permanent shapes upon an external stimulus. These multi-functional materials have attracted researchers' interest due to their endemism thermomechanical and shape memory properties. Extensive fundamental research has been done on this field...

Shape memory polymer (SMP) is one of the most highly researched branches of polymer materials in the recent past. It is often called as a smart material due to its unique capability to memorize original shape. Up to now, shape memory polymer composites (SMPCs) are widely being used for developing light weight and low thickness components for space...

This paper details a shape memory polymer (SMP) synthesis and characterization process has been undertaken to develop a bio-medical material for fabricating non-invasive custom prosthetic components and orthosis devices. The glass transition temperature of a one-way SMP epoxy is tailored for external biomedical applications since human skin is sens...

Smart shape memory polymers (SMPs) and their fibre reinforced composites have a unique ability to memorize and recover a defined shape when exposed to an external stimulus. In recent past, the branch of SMP composites has been one of the highly researched areas in polymer materials, due to their competent thermomechanical and structural properties....

Shape memory polymers (SMPs) and their composites (SMPCs) can undergo large deformations, hold a temporary shape, and then recover their original shape upon exposure to a particular external stimulus. The fibre reinforced SMPCs with enhanced structural performances accelerate the breakthrough technologies for large scale engineering applications. H...

Seawater greenhouse (SWGH) is a technology established to overcome issues related to open field cultivation in arid areas, such as the high ambient temperature and the shortage of freshwater. It adopts the humidification-dehumidification concept where evaporated moisture from a saline water source is condensed to produce freshwater within the green...

This study aimed to explore the potential of developing a novel cooling system combining a greenhouse and an earth-tube heat exchanger (ETHE). In this system, greenhouse air is circulated through the underneath soil mass to use the deep-soil cooling effect. This was achieved through the following steps. First, soil temperature profile inside and ou...

Structural health monitoring (SHM) of new and ageing civil infrastructures is becoming an essential process due to reduced maintenance costs and to avoid catastrophic failures. In particular concrete structures which are being exposed to harsh environments lose their useful operational lives due to many accumulated damages. As such, understanding o...

The present work investigates the effect of solar drying methods on the color and textural attributes of Khalas dates at three ripening stages (khalal, rutab and tamr) and evaluates color change kinetics using three kinetic models. Three solar drying methods, namely, open sun drying (OSD), forced convective drying (FCD) and greenhouse tunnel drying...

The effect of solar drying methods on shrinkage and the corresponding influence on microstructural changes of dates at three ripening stages (khalal, rutab and tamr) were investigated and evaluated shrinkage models that are best describing the shrinkage behavior. Drying was accomplished by forced convective solar dryer, greenhouse tunnel dryer and...