Shabnam Nazari - Academia.edu (original) (raw)
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Papers by Shabnam Nazari
Polymers
Current research deals with thermoplastic polyamide (PA6)-based composites reinforced with basalt... more Current research deals with thermoplastic polyamide (PA6)-based composites reinforced with basalt and Kevlar fabrics. Hybrid composites were developed by altering the stacking sequence of basalt and two kinds of Kevlar fabrics. Pure-basalt- and pure-Kevlar-based samples were also developed for comparison purposes. The developed samples were evaluated with respect to mechanical and thermomechanical properties. Mechanical tests, e.g., tensile, flexural, and impact strength, were conducted along with thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) to ascertain the load-bearing and high-temperature stability of the hybrid composite samples vis-à-vis pure-basalt- and Kevlar-based samples. Scanning electron microscopy (SEM) was carried out to study the nature of fracture and failure of the composite samples. The pure-basalt-based PA6 thermoplastic composites exhibited the best mechanical performance. Hybridization with basalt proved to be beneficial for improv...
Polymers
This investigation deals with the prediction of mechanical behavior in basalt-fiber-reinforced co... more This investigation deals with the prediction of mechanical behavior in basalt-fiber-reinforced concrete using the finite element method (FEM). The use of fibers as reinforcement in concrete is a relatively new concept which results in several advantages over steel-reinforced concrete with respect to mechanical performance. Glass and polypropylene (PP) fibers have been extensively used for reinforcing concrete for decades, but basalt fibers have gained popularity in recent years due to their superior mechanical properties and compatibility with concrete. In this study, the mechanical properties of basalt-fiber-reinforced concrete are predicted using FEM analysis, and the model results are validated by conducting experiments. The effect of fiber-volume fraction on the selected mechanical performance of concrete is evaluated in detail. Significant improvement is observed when the loading is increased. There are superior mechanical properties, e.g., load bearing and strain energy in bas...
JURNAL BUNGA RAMPAI USIA EMAS, 2021
Tujuan program pengabdian kepada masyarakat ini secara umum untuk meningkatkan keterampilan Guru ... more Tujuan program pengabdian kepada masyarakat ini secara umum untuk meningkatkan keterampilan Guru PAUD dalam menyelenggarakan sekolah yang ramah lingkungan. Secara khusus kegiatan ini memberikan peningkatan terhadap Mitra yang meliputi; (1) peningkatan pemahaman Guru mengenai bahan praktikum yang berasal dari sampah; (2) peningkatan kemampuan Guru dalam mengidentifikasi jenis sampah yang bisa dijadikan sebagai bahan dalam membuat karya montase, kolase, dan mozaik; (3) peningkatan pengetahuan Guru untuk memahami pengertian, konsep, dan proses pembuatan karya montase, kolase, dan mozaik; dan (4) mengasah dan meningkatkan keterampilan Guru dalam membuat karya montase, kolase, dan mozaik. Metode pelaksanaan program pengabdian akan dilakukan secara berjenjang, berkesinambungan, dan komprehensif yang dilaksanakan melalui metode pendekatan. Pendekatan di sini dimaksudkan adalah perolehan informasi awal hingga proses kegiatan dilakukan dengan komunikasi secara langsung atau lewat alat komuni...
Materials
The paper reports experimental research regarding the mechanical characteristics of concrete rein... more The paper reports experimental research regarding the mechanical characteristics of concrete reinforced with natural cellulosic fibers like jute, sisal, sugarcane, and coconut. Each type of natural fiber, with an average of 30 mm length, was mixed with a concrete matrix in varying proportions of 0.5% to 3% mass. The tensile and compressive strength of the developed concrete samples with cellulosic fiber reinforcement gradually increased with the increasing proportion of natural cellulosic fibers up to 2%. A further increase in fiber loading fraction results in deterioration of the mechanical properties. By using jute and sisal fiber reinforcement, about 11.6% to 20.2% improvement in tensile and compressive strength, respectively, was observed compared to plain concrete, just by adding 2% of fibers in the concrete mix. Bending strength increased for the natural fiber-based concrete with up to 1.5% fiber loading. However, a decrease in bending strength was observed beyond 1.5% loading...
Polymers
Current research deals with thermoplastic polyamide (PA6)-based composites reinforced with basalt... more Current research deals with thermoplastic polyamide (PA6)-based composites reinforced with basalt and Kevlar fabrics. Hybrid composites were developed by altering the stacking sequence of basalt and two kinds of Kevlar fabrics. Pure-basalt- and pure-Kevlar-based samples were also developed for comparison purposes. The developed samples were evaluated with respect to mechanical and thermomechanical properties. Mechanical tests, e.g., tensile, flexural, and impact strength, were conducted along with thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) to ascertain the load-bearing and high-temperature stability of the hybrid composite samples vis-à-vis pure-basalt- and Kevlar-based samples. Scanning electron microscopy (SEM) was carried out to study the nature of fracture and failure of the composite samples. The pure-basalt-based PA6 thermoplastic composites exhibited the best mechanical performance. Hybridization with basalt proved to be beneficial for improv...
Polymers
This investigation deals with the prediction of mechanical behavior in basalt-fiber-reinforced co... more This investigation deals with the prediction of mechanical behavior in basalt-fiber-reinforced concrete using the finite element method (FEM). The use of fibers as reinforcement in concrete is a relatively new concept which results in several advantages over steel-reinforced concrete with respect to mechanical performance. Glass and polypropylene (PP) fibers have been extensively used for reinforcing concrete for decades, but basalt fibers have gained popularity in recent years due to their superior mechanical properties and compatibility with concrete. In this study, the mechanical properties of basalt-fiber-reinforced concrete are predicted using FEM analysis, and the model results are validated by conducting experiments. The effect of fiber-volume fraction on the selected mechanical performance of concrete is evaluated in detail. Significant improvement is observed when the loading is increased. There are superior mechanical properties, e.g., load bearing and strain energy in bas...
JURNAL BUNGA RAMPAI USIA EMAS, 2021
Tujuan program pengabdian kepada masyarakat ini secara umum untuk meningkatkan keterampilan Guru ... more Tujuan program pengabdian kepada masyarakat ini secara umum untuk meningkatkan keterampilan Guru PAUD dalam menyelenggarakan sekolah yang ramah lingkungan. Secara khusus kegiatan ini memberikan peningkatan terhadap Mitra yang meliputi; (1) peningkatan pemahaman Guru mengenai bahan praktikum yang berasal dari sampah; (2) peningkatan kemampuan Guru dalam mengidentifikasi jenis sampah yang bisa dijadikan sebagai bahan dalam membuat karya montase, kolase, dan mozaik; (3) peningkatan pengetahuan Guru untuk memahami pengertian, konsep, dan proses pembuatan karya montase, kolase, dan mozaik; dan (4) mengasah dan meningkatkan keterampilan Guru dalam membuat karya montase, kolase, dan mozaik. Metode pelaksanaan program pengabdian akan dilakukan secara berjenjang, berkesinambungan, dan komprehensif yang dilaksanakan melalui metode pendekatan. Pendekatan di sini dimaksudkan adalah perolehan informasi awal hingga proses kegiatan dilakukan dengan komunikasi secara langsung atau lewat alat komuni...
Materials
The paper reports experimental research regarding the mechanical characteristics of concrete rein... more The paper reports experimental research regarding the mechanical characteristics of concrete reinforced with natural cellulosic fibers like jute, sisal, sugarcane, and coconut. Each type of natural fiber, with an average of 30 mm length, was mixed with a concrete matrix in varying proportions of 0.5% to 3% mass. The tensile and compressive strength of the developed concrete samples with cellulosic fiber reinforcement gradually increased with the increasing proportion of natural cellulosic fibers up to 2%. A further increase in fiber loading fraction results in deterioration of the mechanical properties. By using jute and sisal fiber reinforcement, about 11.6% to 20.2% improvement in tensile and compressive strength, respectively, was observed compared to plain concrete, just by adding 2% of fibers in the concrete mix. Bending strength increased for the natural fiber-based concrete with up to 1.5% fiber loading. However, a decrease in bending strength was observed beyond 1.5% loading...