scholarly journals FORMULATING GUIDELINES FOR THE SYSTEMATIC SET-UP OF EXPERIENTIAL MATERIAL CHARACTERIZATION STUDIES: A CASE OF PLASTIC DEMONSTRATORS

2021 ◽  
Vol 1 ◽  
pp. 1587-1596
Author(s):  
Lore Veelaert ◽  
Ingrid Moons ◽  
Els Du Bois
Keyword(s):  
Design Process ◽  
Material Characterization ◽  
Plastic Material ◽  
Reasoning Process ◽  
Material Data ◽  
Dependent Variables ◽  
Characterization Studies ◽  
Set Up ◽  
Level Building

AbstractMaterials can be considered from a technical and experiential perspective. However, the latter perspective is more complex to study systematically. Four intertwined experiential levels describe the overall materials experience: sensorial, interpretive, affective, and performative level. Building upon the need in experiential material characterization for comparable physical material representations to enable within-material-class comparisons and the inclusion of extensive user aspects, this paper sums up the reasoning process regarding the understanding and design of an experimental set-up and its parameters of a specific case. The case objective is to formulate guidelines for the designer/researcher to set up experiential material characterization experiments with (i) plastic demonstrator forms and (ii) by consumers. Following elements are discussed: Assessors, Stimuli, Interaction Modalities, Dependent variables, Method, and Practical considerations. Next, future experiments can be carried out in order to generate holistic plastic material data on a larger scale, that can be collected in an experiential database and used by designers throughout the design process.

scholarly journals Diffraction of plane elastic waves by a crack, with application to a problem of brittle fracture

1963 ◽  
Vol 3 (3) ◽  
pp. 325-339 ◽  
Author(s):  
M. Papadopoulos
Keyword(s):  
Elastic Waves ◽  
Scattered Field ◽  
Velocity Potential ◽  
Elastic Solid ◽  
Step Function ◽  
Free Surface Waves ◽  
Dependent Variables ◽  
Smooth Plane ◽  
New Feature ◽  
Set Up

AbstractA crack is assumed to be the union of two smooth plane surfaces of which various parts may be in contact, while the remainder will not. Such a crack in an isotropic elastic solid is an obstacle to the propagation of plane pulses of the scalar and vector velocity potential so that both reflected and diffracted fields will be set up. In spite of the non-linearity which is present because the state of the crack, and hence the conditions to be applied at the surfaces, is a function of the dependent variables, it is possible to separate incident step-function pulses into either those of a tensile or a compressive nature and the associated scattered field may then be calculated. One new feature which arises is that following the arrival of a tensile field which tends to open up the crack there is necessarily a scattered field which causes the crack to close itself with the velocity of free surface waves.

scholarly journals White-light speckle image correlation applied to large-strain material characterization

2009 ◽  
pp. 377-392
Author(s):  
Giovanni B. Broggiato ◽  
Luca Cortese
Keyword(s):  
Material Characterization ◽  
Plastic Material ◽  
Large Strain ◽  
Equivalent Stress ◽  
Tensile Tests ◽  
Equivalent Strain ◽  
Image Correlation ◽  
Plastic Behavior ◽  
Full Field ◽  
Measurement Devices

In experimental mechanics, the possibility of tracking on component surfaces the full-field stress and strain states during deformation can be utilized for many purposes such as formability limits determination, quantification of stress intensification factors, material characterization and so on. Concerning the last topic, an interesting application could be a direct identification of the elasto-plastic material response up to large deformation. It is well known, in fact, that with traditional measurement devices it is possible to retrieve the true equivalent stress versus true equivalent strain data from tensile tests only up to the onset of necking, where localization starts to occur. This work aims to show how from the knowledge of a tensile test full-field strain and of load data it will be possible to obtain the full-stress field as well as the complete material elasto-plastic behavior.

Design of an AC Conductivity Measurement Setup for Sensor Materials Characterization

2014 ◽  
Vol 4 (2) ◽  
pp. 1-7
Author(s):  
Nisha Rajappan ◽  
K.N. Madhusoodanan
Keyword(s):  
Material Characterization ◽  
Ac Conductivity ◽  
Gas Sensing ◽  
Conductivity Measurement ◽  
Sensor Material ◽  
Semiconductor Gas Sensor ◽  
Sensor Materials ◽  
Set Up ◽  
Sensing Characteristics ◽  
Conductivity Cell

AC conductivity measurement can be an effective method for the study of sensor material characteristics for gas sensing. The authors have designed and fabricated a sensitive set up for sensor material characterization using ac conductivity measurement. The set up fabricated is employed for bulk samples. AC conductivity cell with cold fingertip that can facilitate measurement in the range 80 K to 500 K has been fabricated. The necessary vacuum lines and gas feed throughs are provided in order to study the gas sensing characteristics of semiconductor gas sensor materials. A programmable PID temperature controller and the necessary signal conditioning circuits are designed and incorporated into the system. AC conductivity measurement is carried out using Fluke PM 6306 impedance analyzer.

scholarly journals Design Considerations for Therapeutic Devices - An Investigation of Pre-Schoolers’ Preferences for an Artefact’s Basic Characteristics

2019 ◽  
Vol 1 (1) ◽  
pp. 877-886
Author(s):  
Emanuel Balzan ◽  
Philip Farrugia ◽  
Owen Casha ◽  
Liberato Camilleri ◽  
Andrew Wodehouse
Keyword(s):  
Design Process ◽  
Consumer Products ◽  
Design Stage ◽  
Surface Appearance ◽  
Design Considerations ◽  
Gender And Age ◽  
Material Hardness ◽  
Basic Characteristics ◽  
Dominant Characteristic ◽  
Set Up

AbstractToys are children's first consumer products and while playing they acquire numerous skills, learn about their environment and socialise with other children and adults. Toys are adapted and used by clinicians as therapeutic devices because they allow them to create bonds and communicate with children. Aesthetical aspects should be considered early in the design process, especially since pre-schoolers’ views are still dominated by the appearance of artefacts, also known as, the perceptual salient characteristics. The study of emotions mediates the understanding of the relationships between a product, user and the process with which consumers set up preferences over products. Decisions taken in each design stage will influence whether therapeutic devices will be enjoyed by children. An experiment was carried out to test out pre-schoolers’ preferences on individual attributes: form, dimension, material (hardness and weight) and surface (appearance and texture). This study exposed dominant characteristic preferences and the fact that some are influenced by gender and age. Employing these findings in therapeutic devices will enable clinicians to better engage the children during therapy.

Behavior-Form Double Directions Creative Conceptual Design Model and Its Quotient Space Implementation

2008 ◽  
Author(s):  
Yu-Xin Wang ◽  
Yu-Tong Li ◽  
Jian-Wei Wang
Keyword(s):  
Conceptual Design ◽  
Design Process ◽  
Quotient Space ◽  
Basic Structure ◽  
Basic Operation ◽  
Decomposition Tree ◽  
Function Decomposition ◽  
Design Variables ◽  
Set Up

This paper presents a novel indirect matching approach between the function layer and the form layer to enhance the capability for the FBS method to obtain the creative conceptual design results. Firstly, the basic operation actions set, which is composed of the basic operation actions obtained by decomposing each function in the lowest level of the function decomposition tree in the FBS model into the sub-functions, in the function layer is regrouped dynamically. This behavior regroup process has introduced the new design variables into the conceptual design process and leads the behavior creativity to produce. On the other hand, considering the multi-functions for each basic structure to have and representing these functions with the basic operation actions, then the basic operation actions set in the form layer is set up. Dynamic regrouping this set in the form layer, the new design variables has been introduced into the conceptual design process, and leads the form creativity to produce. Through the above behavior-form double directions creative process, the solution scope of the conceptual design is enlarged obviously. Therefore, the method present in this paper has enough capability to obtain the creative conceptual results. Furthermore, the model presented in this paper is represented with the quotient space mathematically. The case study has shown that in the function layer, through adjusting the attribute function, which determines the partition grain of the basic operation actions set in the function layer or in the form layer, the new behaviors can be generated.

scholarly journals Use Design Performance Based on Use Requirements

2019 ◽  
Vol 1 (1) ◽  
pp. 3771-3780
Author(s):  
Morad Mahdjoub ◽  
Jean-Bernard Bluntzer ◽  
Aymeric Bertin
Keyword(s):  
Design Process ◽  
Performance Metrics ◽  
Performance Indicator ◽  
Lead Times ◽  
Quality Cost ◽  
Technical Management ◽  
Industrial Companies ◽  
Product Design Process ◽  
Set Up ◽  
Process Managers

AbstractIndustrial companies today must operate in an increasingly competitive world and need to rethink their organization accordingly. First, industrial strategies concerning technical management need to change and develop. If we consider the specific management of the product design process, managers use indicators during the lifecycle of the product concerning quality, cost and lead-times. For example, some new indicators concerning performance metrics related to cooperation issues among the design team are set up. Secondly, managers increasingly need to integrate the user in the early phases of the design process. The main benefit of this approach is that it allows designers to innovate more rapidly and robustly. The aim of this paper is to introduce a new approach making it possible to calculate a performance indicator concerning use design. The new indicator will help management drive the design process through the integration of use in the product, helping to enhance the usability of the future product, and consequently improve innovation.

Modeling the Collaborative Design of the Automotive Powertrain System Based on the Design Structure Matrix

2015 ◽  
Vol 789-790 ◽  
pp. 1311-1316 ◽  
Author(s):  
Thanh Cong Nguyen ◽  
Yao Jin
Keyword(s):  
Design Process ◽  
Collaborative Design ◽  
Flow Diagram ◽  
Design Structure Matrix ◽  
Structure Matrix ◽  
Design Structure ◽  
Powertrain System ◽  
Development Cycle ◽  
Automotive Powertrain ◽  
Set Up

This paper examines the application of proposed Design Structure Matrix (DSM) by modeling the collaborative design of the Automotive Powertrain System. A task of the whole design process is divided into several levels and some specific design tasks. Respectively, the flow diagram is set up based on the DSM principle. In order to optimize the design process and to shorten the development cycle, detailed analysis and reconstruction of DSM were performed by eliminating iterative design process.

Study on Impinging Stream Flow Channel in Abrasive Flow Polishing Complex Cavity of Precision Mold

2013 ◽  
Vol 797 ◽  
pp. 469-474
Author(s):  
Di Feng Zhou ◽  
Dong Yu Liu
Keyword(s):  
Stream Flow ◽  
Plastic Material ◽  
Material Model ◽  
Impact Deformation ◽  
Element Simulation ◽  
Complex Cavity ◽  
Elastic Plastic Material ◽  
Set Up ◽  
The Impact ◽  
Abrasive Flow Polishing

In order to solve the problem about polishing complex cavity of precision mold, to improve the efficiency of processing and reduce the surface roughness, putting forward multiple entries impinging stream processing device.With making use of the collision of two strands of abrasive flow, Realizing the mutual disturbance of abrasive flow in the runner, and increasing the collision between abrasive to improve the disordering of abrasive movement, for promoting abrasive polishing to mold cavity. Johnson-Cook elastic-plastic material model is set up at the same time, using abaqus finite element simulation to simulate the impact deformation wear and cutting wear with the increasment of impact times.

THE USE OF FMEA IN PROCESS QUALITY IMPROVEMENT

1995 ◽  
Vol 02 (01) ◽  
pp. 103-115 ◽  
Author(s):  
MANI JANAKIRAM ◽  
J. BERT KEATS
Keyword(s):  
Quality Improvement ◽  
Failure Mode ◽  
Design Process ◽  
Process Quality ◽  
Process Characterization ◽  
Improvement Programs ◽  
Characterization Studies ◽  
Quality Improvement Programs

Failure Mode and Effects Analysis (FMEA) is well-known as a useful tool in the design process. It is used by some engineers as part of process characterization studies. Yet FMEA is virtually ignored in most process quality improvement paradigms. We suggest its use in quality improvement programs and indicate where it belongs and how it can be applied.

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