Noor Alia Md Zain
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Preferred name
Noor Alia Md Zain
Official Name
Noor Alia , Md Zain
Alternative Name
Mohd Zain, Noor Alia
Zain, Noor Alia Md
Md Zain, N. A.
Zain, N. A.M.
Zain, Nurul Alia Md
Main Affiliation
Scopus Author ID
57189072587
Researcher ID
GLF-8969-2022

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  • Publication
    Convergence and stress analysis of the homogeneous structure of human femur bone during standing up condition
    ( 2017-09-26)
    Izzawati Basirom
    ;
    Ruslizam Daud
    ;
    Mohd Afendi Rojan
    ;
    Mohd Shukry Abdul Majid
    ;
    Noor Alia Md Zain
    Finite element models have been widely used to quantify the stress analysis and to predict the bone fractures of the human body. The present study highlights on the stress analysis of the homogeneous structure of human femur bone during standing up condition. The main objective of this study is to evaluate and understand the biomechanics for human femur bone and to prepare orthotropic homogeneous material models used for FE analysis of the global proximal femur. Thus, it is necessary to investigate critical stress on the human femur bone for future study on implantation of internal fixator and external fixator. The implication possibility to create a valid FE model by simply comparing the FE results with the actual biomechanics structures. Thus, a convergence test was performed by FE model of the femur and the stress analysis based on the actual biomechanics of the human femur bone. An increment of critical stress shows in the femur shaft as the increasing of load on the femoral head and decreasing the pulling force at greater trochanter.
  • Publication
    Numerical simulation of stress amplification induced by crack interaction in human femur bone
    ( 2014)
    Noor Alia Md Zain
    This research is about numerical simulation using computational method which study on stress amplification induced by crack interaction in human femur bone. Crack in human femur bone usually occur because of large load or stress applied on it. Usually, the fracture takes longer time to heal itself. The crack interaction is still not well understood due to bone complexity. Thus, brittle fracture behaviour of bone may be underestimated and inaccurate. This study aims in investigating the geometrical effect of double co-planar edge cracks on stress intensity factor (K) in femur bone. Other than that, this research also focus in the amplification effect on fracture behaviour of double co-planar edge cracks, where numerical model is developed using computational method. The concept of fracture mechanics and numerical approaches to solve interacting cracks problems using linear elastic fracture mechanics (LEFM) theory is used. So, it is important to study what is the parameter that can minimize the crack propagation to prevent complete failure. This study has shown that the crack interaction limit (CIL) and crack unification limit (CUL) exist in the model developed. In future development of this research, several improvements will be made such as varying the load, applying thickness on the model and also use different theory or method in calculating the stress intensity factor (K).
      1  16
  • Publication
    Stress analysis of implant-bone fixation at different fracture angle
    ( 2017-10-29)
    Izzawati Basirom
    ;
    Ruslizam Daud
    ;
    Mohd Afendi Rojan
    ;
    Mohd Shukry Abdul Majid
    ;
    Noor Alia Md Zain
    ;
    Mohd Yazid Bajuri
    Internal fixation is a mechanism purposed to maintain and protect the reduction of a fracture. Understanding of the fixation stability is necessary to determine parameters influence the mechanical stability and the risk of implant failure. A static structural analysis on a bone fracture fixation was developed to simulate and analyse the biomechanics of a diaphysis shaft fracture with a compression plate and conventional screws. This study aims to determine a critical area of the implant to be fractured based on different implant material and angle of fracture (i.e. 0°, 30° and 45°). Several factors were shown to influence stability to implant after surgical. The stainless steel, (S. S) and Titanium, (Ti) screws experienced the highest stress at 30° fracture angle. The fracture angle had a most significant effect on the conventional screw as compared to the compression plate. The stress was significantly higher in S.S material as compared to Ti material, with concentrated on the 4th screw for all range of fracture angle. It was also noted that the screws closest to the intense concentration stress areas on the compression plate experienced increasing amounts of stress. The highest was observed at the screw thread-head junction.
      23  1
  • Publication
    Stress interaction behaviour in alveolar cortical bone fracture
    (UiTM Press, 2022-01-01)
    Noor Alia Md Zain
    ;
    Azmi M.S.M.
    ;
    Ruslizam Daud
    ;
    Noor S.N.F.M.
    ;
    Akeel N.A.A.
    Improving the mechanical integrity of the dental implantation through optimal stress distribution between the implant and the surrounding bone has reduced the risk of bone injury and implant loosening risk. Inversely, the clinical failure of implantation will result in the formation of microcracks in the alveolar bone. The uncertainty of stress interaction intensity between microcracks has been an unsolved issue regarding the load transfer between the implant and alveolar bone. This study investigates the magnitude of stress shielding and stress amplification to explain the behaviour of double edge (DE) microcracks that are identically formed due to various stability conditions of implantation under occlusal loading. A series of finite element modelling have been conducted to simulate the stress shielding and stress amplification behaviour based on the displacement extrapolation method (DEM) and contour integral analysis. The occlusal loading schemes are translated into Mode I, Mode II and Mixed-mode loading. The presented DE models have demonstrated the transition behaviour of DE parallel microcracks into a single edge (SE) crack basic behaviour, where the crack unification limit (CUL) and crack interaction limit (CIL) are identified at lower and a higher rates of a/W. The occlusal loading has shown significant influence on the intensity of stress shielding and stress amplification behaviour in a form of DE-SE microcracks interaction for Mode I and Mixed-mode occlusal loading.
      7  14