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Load case means: all the external loads which have any effect on our product. Task: the ______. Base: theory & practice of product analysis the engineer generally designs products for a certain period of time (planned obsolescence), therefore the load, as a function of time is the most important factor. Gépelemek bevezetés| GÉPELEMEK 1. előadás 18 Different time-dependent load case modells Gépelemek 1. M(t) Terhelés mint idõfüggv. Application examples (for polymer elements): M(t) Idõben változó Idõben állandó M(t) Folyamatosan Változó Szakaszosan változó t -interference fitted ring on a shaft, -reading lamp,clamped -(bolt joints), -intermittent operation of an impeller, M(t) Változó ampl. Állandó amplitúdó t M(t) Rendszertelen Rendszerezett t -rollers, -gears. -programmed, experimental fatigue test M(t) Stacionér t M(t) -real load case, Instacionér [by.Matolcsy Mátyás]
Load case means: all the external loads which have any effect on our product. Task: the ______. Base: theory & practice of product analysis the engineer generally designs products for a certain period of time (planned obsolescence), therefore the load, as a function of time is the most important factor. Gépelemek bevezetés| GÉPELEMEK 1. előadás 18 Different time-dependent load case modells Gépelemek 1. M(t) Terhelés mint idõfüggv. Application examples (for polymer elements): M(t) Idõben változó Idõben állandó M(t) Folyamatosan Változó Szakaszosan változó t -interference fitted ring on a shaft, -reading lamp,clamped -(bolt joints), -intermittent operation of an impeller, M(t) Változó ampl. Állandó amplitúdó t M(t) Rendszertelen Rendszerezett t -rollers, -gears. -programmed, experimental fatigue test M(t) Stacionér t M(t) -real load case, Instacionér [by.Matolcsy Mátyás]
load-modell creation
Second step of the designer: For optimal operation: to determine the maximum allowable stresses & endurance limits of structures & assemblies. To determine in advance. All possible effects & failure modes, fatigue & fracture causes Methodology: e.g. ______
Second step of the designer: For optimal operation: to determine the maximum allowable stresses & endurance limits of structures & assemblies. To determine in advance. All possible effects & failure modes, fatigue & fracture causes Methodology: e.g. ______
DFMEA (Design Failure Mode and Effect Analysis)
Possible reasons: On loaded mating surfaces it is ______ therefore (eg.: heating, ______, scoring, scuffing), Temperature field effects (eg.: material property change, heat expansion, heat stress), Non-allowable motions ( eg.: vibration, swing), Different substrate, radiation (eg.: corrosion, expansion, aging), Electrical, optical, various property change, Biological degradation, etc.
Possible reasons: On loaded mating surfaces it is ______ therefore (eg.: heating, ______, scoring, scuffing), Temperature field effects (eg.: material property change, heat expansion, heat stress), Non-allowable motions ( eg.: vibration, swing), Different substrate, radiation (eg.: corrosion, expansion, aging), Electrical, optical, various property change, Biological degradation, etc.
wear
The failure process can lead us to: Usage value decrease, Needed refurbishment, maintenance, Most dangerous method, the . The ______ is related to stress- and strain state (plastic, ductile, creep, relaxation, stb.) of the material. Remark: in further investigations we use the Hooke’s law as a material modell, but in some cases we can also study the elasto-plastic transition as a boundary condition and also the modells of the fatigue&.
The failure process can lead us to: Usage value decrease, Needed refurbishment, maintenance, Most dangerous method, the . The ______ is related to stress- and strain state (plastic, ductile, creep, relaxation, stb.) of the material. Remark: in further investigations we use the Hooke’s law as a material modell, but in some cases we can also study the elasto-plastic transition as a boundary condition and also the modells of the fatigue&.
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The third step of the designer: ______. He designs the structure with dimensions and calculates the stress state from the load case and then compare it to endurance limit of given elements and determine whether the construction is good or wrong. endurance limit of structure safety (factor) = stress state of structure safety (factor) = ultimate strength working stress brittle, rigid materials safety (factor) = yield strength working stress ductile materials Endurance limit can mean uselessness for products. eg. Bigger deflection than expected, buckling, indentation, wear, etc.
The third step of the designer: ______. He designs the structure with dimensions and calculates the stress state from the load case and then compare it to endurance limit of given elements and determine whether the construction is good or wrong. endurance limit of structure safety (factor) = stress state of structure safety (factor) = ultimate strength working stress brittle, rigid materials safety (factor) = yield strength working stress ductile materials Endurance limit can mean uselessness for products. eg. Bigger deflection than expected, buckling, indentation, wear, etc.
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Nowadays we have more & more interests to have reality close models and describe more & more reality effects in engineering models. e.g.: cumulative failure theories, operational solidness, ______, e.g. calculation for a so-called surviving possibility function, calculation for fracture, and checking, calculation for elasto-plastic boundary conditions, and further different theories & methods.
Nowadays we have more & more interests to have reality close models and describe more & more reality effects in engineering models. e.g.: cumulative failure theories, operational solidness, ______, e.g. calculation for a so-called surviving possibility function, calculation for fracture, and checking, calculation for elasto-plastic boundary conditions, and further different theories & methods.
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is the process of designing parts, components or products for ease of manufacturing with an end goal of making a better product at a lower cost. This is done by simplifying, optimizing and refining the product design.
is the process of designing parts, components or products for ease of manufacturing with an end goal of making a better product at a lower cost. This is done by simplifying, optimizing and refining the product design.
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Engineering tasks: to select material according to the requirements list. Materials can be chosen: − cast iron, − steel , − aluminium, − bronze, − polymer, − glass, porcelain, − ______, − wood, paper etc. At first approach: our brain-storming can be guided by the ratio different material properties. (modulus, stress, strain)
Engineering tasks: to select material according to the requirements list. Materials can be chosen: − cast iron, − steel , − aluminium, − bronze, − polymer, − glass, porcelain, − ______, − wood, paper etc. At first approach: our brain-storming can be guided by the ratio different material properties. (modulus, stress, strain)
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Let’s take a look at. − − − − − − mechanical, ______, electrical, optical, tribological, And other, specific properties. The engineer: to explore the advance material properties and reduce the disadvantageous effects.
Let’s take a look at. − − − − − − mechanical, ______, electrical, optical, tribological, And other, specific properties. The engineer: to explore the advance material properties and reduce the disadvantageous effects.
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Polymers are. ______: Thermal properties: − density (ρ): app. 1/7, − operation temperature:
Polymers are. ______: Thermal properties: − density (ρ): app. 1/7, − operation temperature:
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Joints function to transfer forces and torques between ______
Joints function to transfer forces and torques between ______
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Plumbing elements handle the storage, transfer, and regulation of ______ and gases
Plumbing elements handle the storage, transfer, and regulation of ______ and gases
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Springs and spring systems store energy and dampen dynamic ______
Springs and spring systems store energy and dampen dynamic ______
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Arrangements like bearings and linear guideways facilitate force transfer through mechanical ______
Arrangements like bearings and linear guideways facilitate force transfer through mechanical ______
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Drives and drive systems convert power from one form to ______
Drives and drive systems convert power from one form to ______
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Engineers aim to find solutions to technical problems, optimizing various aspects such as material, structure, manufacturing, product-human interface, quality, timing, and ______
Engineers aim to find solutions to technical problems, optimizing various aspects such as material, structure, manufacturing, product-human interface, quality, timing, and ______
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Engineers work in interdisciplinary teams, utilizing various sciences such as mathematics, mechanics, materials, manufacturing, streams, heat, economy, ergonomics, aesthetics, and ______
Engineers work in interdisciplinary teams, utilizing various sciences such as mathematics, mechanics, materials, manufacturing, streams, heat, economy, ergonomics, aesthetics, and ______
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Product design often follows the Pahl-Beitz design ______
Product design often follows the Pahl-Beitz design ______
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Engineers are problem solvers who apply scientific and mathematical principles to create safe, efficient, and cost-effective solutions for ______
Engineers are problem solvers who apply scientific and mathematical principles to create safe, efficient, and cost-effective solutions for ______
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Engineers must consider load cases, stresses, and threshold values when designing ______
Engineers must consider load cases, stresses, and threshold values when designing ______
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Engineering involves balancing priorities such as quality, timing, and ______
Engineering involves balancing priorities such as quality, timing, and ______
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Manufacturing costs depend on the number of pieces, choice of manufacturing process, and ______
Manufacturing costs depend on the number of pieces, choice of manufacturing process, and ______
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Machine elements are individual parts of the machine that move and impact other parts to make the machine work. Although a machine element may consist of smaller structural parts, the entire setup that performs the function is considered the ______.
Machine elements are individual parts of the machine that move and impact other parts to make the machine work. Although a machine element may consist of smaller structural parts, the entire setup that performs the function is considered the ______.
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Gears are rotating parts with interlocking teeth that turn against other gears, causing them to turn and transmit rotational force, or torque. Bearings are used to carry force — an example is the ball bearing, which allows for reduced friction as it rolls freely beneath a moving part. Shafts and couplings, like gears, also transmit torque and are used to connect parts, especially in vehicles such as cars and motorcycles. General-purpose machine elements can be used in any application, and include items such as ______, ______, and ______.
Gears are rotating parts with interlocking teeth that turn against other gears, causing them to turn and transmit rotational force, or torque. Bearings are used to carry force — an example is the ball bearing, which allows for reduced friction as it rolls freely beneath a moving part. Shafts and couplings, like gears, also transmit torque and are used to connect parts, especially in vehicles such as cars and motorcycles. General-purpose machine elements can be used in any application, and include items such as ______, ______, and ______.
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Nowadays we have more & more interests to have reality close models and describe more & more reality effects in engineering models. e.g.: cumulative failure theories, operational solidness, ______, e.g. calculation for a so-called surviving possibility function, calculation for fracture, and checking, calculation for elasto-plastic boundary conditions, and further different theories & methods.
Nowadays we have more & more interests to have reality close models and describe more & more reality effects in engineering models. e.g.: cumulative failure theories, operational solidness, ______, e.g. calculation for a so-called surviving possibility function, calculation for fracture, and checking, calculation for elasto-plastic boundary conditions, and further different theories & methods.
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Polymers are. ______: Thermal properties: − density (ρ): app. 1/7, − operation temperature:
Polymers are. ______: Thermal properties: − density (ρ): app. 1/7, − operation temperature:
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Materials can be chosen: − cast iron, − steel , − aluminium, − bronze, − polymer, − glass, porcelain, − ______, − wood, paper etc. At first approach: our brain-storming can be guided by the ratio different material properties. (modulus, stress, strain)
Materials can be chosen: − cast iron, − steel , − aluminium, − bronze, − polymer, − glass, porcelain, − ______, − wood, paper etc. At first approach: our brain-storming can be guided by the ratio different material properties. (modulus, stress, strain)
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The third step of the designer: ______. He designs the structure with dimensions and calculates the stress state from the load case and then compare it to endurance limit of given elements and determine whether the construction is good or wrong. endurance limit of structure safety (factor) = stress state of structure safety (factor) = ultimate strength working stress brittle, rigid materials safety (factor) = yield strength working stress ductile materials Endurance limit can mean uselessness for products. eg. Bigger deflection than expected, buckling, indentation, wear, etc.
The third step of the designer: ______. He designs the structure with dimensions and calculates the stress state from the load case and then compare it to endurance limit of given elements and determine whether the construction is good or wrong. endurance limit of structure safety (factor) = stress state of structure safety (factor) = ultimate strength working stress brittle, rigid materials safety (factor) = yield strength working stress ductile materials Endurance limit can mean uselessness for products. eg. Bigger deflection than expected, buckling, indentation, wear, etc.
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Second step of the designer: For optimal operation: to determine the maximum allowable stresses & endurance limits of structures & assemblies. To determine in advance. All possible effects & failure modes, fatigue & fracture causes Methodology: e.g. ______
Second step of the designer: For optimal operation: to determine the maximum allowable stresses & endurance limits of structures & assemblies. To determine in advance. All possible effects & failure modes, fatigue & fracture causes Methodology: e.g. ______
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Possible reasons: On loaded mating surfaces it is ______ therefore (eg.: heating, ______, scoring, scuffing), Temperature field effects (eg.: material property change, heat expansion, heat stress), Non-allowable motions ( eg.: vibration, swing), Different substrate, radiation (eg.: corrosion, expansion, aging), Electrical, optical, various property change, Biological degradation, etc.
Possible reasons: On loaded mating surfaces it is ______ therefore (eg.: heating, ______, scoring, scuffing), Temperature field effects (eg.: material property change, heat expansion, heat stress), Non-allowable motions ( eg.: vibration, swing), Different substrate, radiation (eg.: corrosion, expansion, aging), Electrical, optical, various property change, Biological degradation, etc.
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Let’s take a look at. − − − − − − mechanical, ______, electrical, optical, tribological, And other, specific properties. The engineer: to explore the advance material properties and reduce the disadvantageous effects.
Let’s take a look at. − − − − − − mechanical, ______, electrical, optical, tribological, And other, specific properties. The engineer: to explore the advance material properties and reduce the disadvantageous effects.
Signup and view all the answers
is the process of designing parts, components or products for ease of manufacturing with an end goal of making a better product at a lower cost. This is done by simplifying, optimizing and refining the product design.
is the process of designing parts, components or products for ease of manufacturing with an end goal of making a better product at a lower cost. This is done by simplifying, optimizing and refining the product design.
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Study Notes
- Machines consist of various types of elements, including: joints, plumbing elements, springs, arrangements, drives, and complete assemblies.
- Joints function to transfer forces and torques between parts.
- Plumbing elements handle the storage, transfer, and regulation of liquids and gases.
- Springs and spring systems store energy and dampen dynamic systems.
- Arrangements like bearings and linear guideways facilitate force transfer through mechanical movement.
- Drives and drive systems convert power from one form to another.
- Engineers aim to find solutions to technical problems, optimizing various aspects such as material, structure, manufacturing, product-human interface, quality, timing, and costs.
- Engineers work in interdisciplinary teams, utilizing various sciences such as mathematics, mechanics, materials, manufacturing, streams, heat, economy, ergonomics, aesthetics, and marketing.
- Product design often follows the Pahl-Beitz design process.
- Engineers are problem solvers who apply scientific and mathematical principles to create safe, efficient, and cost-effective solutions for society.
- Engineers must consider load cases, stresses, and threshold values when designing structures.
- Engineering involves balancing priorities such as quality, timing, and cost.
- Engineers are part of a quality system to meet customer requirements effectively and efficiently.
- Manufacturing costs depend on the number of pieces, choice of manufacturing process, and tolerances.
- Tight tolerances may require additional processes and inspections or render a part impractical to produce economically.
- Design and development is a technology that requires teamwork, effective communication, and various methodologies.
- Engineers work in effective teams, considering marketing, design, manufacturing, preparation, purchasing, supplier development, management, customer methodology, and ethics.
- Engineers go through a three-step design process, beginning with determining the load case of the structure, followed by identifying the state of stress and stress limits, and finally designing the geometrical structure and dimensions.
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Description
Test your knowledge of machine elements with this quiz covering mechanical systems, machine parts, and the operation principles of machines. Authors: Dr. Kerényi György Molnár László, Dr. Marosfalvi János, Dr. Horák Péter, & Dr. Baka Ernő.
