Muhamad Nur Misbah
Thumbnail Image
Preferred name
Muhamad Nur Misbah
Official Name
Muhamad Nur , Misbah
Alternative Name
Misbah, M. N.
Misbah, Muhamad N.
Main Affiliation
Scopus Author ID
55898764800
Researcher ID
GLV-5483-2022

Research Output

Filters

2
1
2
1 1
Reset filters

Settings
Now showing 1 - 2 of 2
  • Publication
    Effects of Cutouts on Energy Absorption Characteristics of Thin-walled Tube Impacted under Dynamic Loading
    (Universiti Malaysia Perlis, 2022-12)
    M. H. Zikri
    ;
    M. Ahmad
    ;
    Muhamad Nur Misbah
    ;
    Wan Mohd Faizal Wan Nik
    ;
    Mohd Al-Hafiz Mohd Nawi
    ;
    Mohd Haidiezul Jamal Ab Hadi
    ;
    Mohd. Hazwan Mohd. Hanid
    A thin-walled tube is an energy absorber device that is commonly used in automotive and locomotive applications. The function of this element is to convert the kinetic energy into other forms of energy during a collision that can minimize injuries to the passengers. Therefore, various studies have been reported previously to improve the thin-walled structure to decrease the damage and provide protection for the vehicle and occupant. This study aims to determine the effects of the cutout on the thin-walled tube when impacted under dynamic axial loading. The effects of sizes, shapes, locations, and the number of cutouts on the energy absorption characteristics have been analyzed by using the validated finite element model. The result indicates that a circular tube with a square cutout shape, larger cutout sizes, and near the top-end of the tube has more energy absorption characteristics. Furthermore, the results of energy absorption (EA), crush force efficiency (CFE), and specific energy absorption (SEA) are highest when applying four cutouts on the surface of the thin-walled tube. Research information provided in this study will serve as a guide in designing the cutout thin-walled tube for crashworthiness enhancements in the future.
      2  5
  • Publication
    Computational Fluid Dynamics Analysis of Varied Cross-Sectional Areas in Sleep Apnea Individuals across Diverse Situations
    ( 2024-01-01)
    Wan Mohd Faizal Wan Ab Rahim
    ;
    Khor Chu Yee
    ;
    Mohamad Suhaimi Shahrin
    ;
    Muhamad Nur Misbah
    ;
    Mohd. Hazwan Mohd. Hanid
    ;
    Masniezam Ahmad
    ;
    Mohd Haidiezul Jamal Ab Hadi
    Obstructive sleep apnea (OSA) is a common medical condition that impacts a significant portion of the population. To better understand this condition, research has been conducted on inhaling and exhaling breathing airflow parameters in patients with obstructive sleep apnea. A steady-state Reynolds-averaged Navier–Stokes (RANS) approach and an SST turbulence model have been utilized to simulate the upper airway airflow. A 3D airway model has been created using advanced software such as the Materialize Interactive Medical Image Control System (MIMICS) and ANSYS. The aim of the research was to fill this gap by conducting a detailed computational fluid dynamics (CFD) analysis to investigate the influence of cross-sectional areas on airflow characteristics during inhale and exhale breathing in OSA patients. The lack of detailed understanding of how the cross-sectional area of the airways affects OSA patients and the airflow dynamics in the upper airway is the primary problem addressed by this research. The simulations revealed that the cross-sectional area of the airway has a notable impact on velocity, Reynolds number, and turbulent kinetic energy (TKE). TKE, which measures turbulence flow in different breathing scenarios among patients, could potentially be utilized to assess the severity of obstructive sleep apnea (OSA). This research found a vital correlation between maximum pharyngeal turbulent kinetic energy (TKE) and cross-sectional areas in OSA patients, with a variance of 29.47%. Reduced cross-sectional area may result in a significant TKE rise of roughly 10.28% during inspiration and 10.18% during expiration.
      1  24