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20 results for “CMM”
Liquid Resin Infusion (LRI) manufacturing and Spring_In monitoring by FBGs, DCs and 3D CMM meassurements
<p>ELADINE project is aiming to implement a numerical tool that can reduce reoccurring costs of low-volume production in composite manufacturing of primary structural elements and thus reducing overall manufacturing effort and carbon emissions. A<strong> primary goal of this project is to eliminate tolerance non-compliancy in the manufactured structures caused by natural and unavoidable post-manufacturing distortions, typical for composite materials</strong>. These distortions might render otherwise qualitative components unusable due to their final geometry.</p> <p>Objectives of the Numerical model validation are:</p> <ul> <li>To understand the dominant factors which affects the spring-in phenomenon.</li> <li>To provide the simulation tool with the required values of the properties that influence on spring-in.</li> <li>To verify the simulation tool ability to predict spring-in for a variety of conditions.</li> <li>To develop a procedure of adapting and embedding sensors (dielectric and fiber optic) to obtain proper, useful and accurate signals of the manufacturing parameters (T, degree of cure, strain).</li> <li>To develop interpretation procedures of the signal/curves of sensors to obtain on-line process monitoring information.</li> </ul> <p>To obtain the data to feed and develop the numerical tool able to estimate the component distortions after its manufacturing, a combination of Fiber Optic Sensors (FOS) based on Fiber Bragg Grating (FBG) technology, Dielectric Curing sensors (DC) and 3D scanning were used to monitor the composite coupon manufacturing and the distortions the days after being demoulded. During the manufacturing process embedded FBGs and DC sensors were used to monitor the coupon temperature and strain distribution and resin curing evolution. After the manufacturing and the demolding, the distortions evolution were monitored by the embedded FBGs and by 3D CMM measurements.</p> <p><strong>In the ELADINE project, the distortion monitoring was made to two Out-of-Autoclave manufacturing technologies: liquid resin infusion (LRI) and oven cured pre-preg</strong>. For both material systems, slightly curved coupons and C-shaped coupons were the geometries selected as representative for the Skin and spars of the wing box. The Skin coupon was curved panel with a 1475 mm radius (with edge rise of 7,65 mm) that was thought to best replicate the wing profile geometry. The C-spar coupon geometry selected for the study was a non-tapered spar section with two different angle with radius of curvature of 5mm and 12mm. This geometry was chosen to simplify measuring and comparisons with wing demo. Furthermore, three different thickness are studied for the Skin coupons and two for the C-spar coupons which were selected from different zones along the wing. Moreover, a C-spar coupon with variable thickness was studied, as a simulation of the transition between zones with different thickness in the wing.</p> <p><strong>In this dataset, the data from the FBGs, DCs and 3D CMM meassurements for the LRI manufacturing process and spring_in distortions monitoring is included.</strong></p>
Pre-Preg (PP) Manufacturing and Spring-in monitoring through FBGs, DCs and 3D CMM measurements
<p>ELADINE project is aiming to implement a numerical tool that can reduce reoccurring costs of low-volume production in composite manufacturing of primary structural elements and thus reducing overall manufacturing effort and carbon emissions. A<strong> primary goal of this project is to eliminate tolerance non-compliancy in the manufactured structures caused by natural and unavoidable post-manufacturing distortions, typical for composite materials</strong>. These distortions might render otherwise qualitative components unusable due to their final geometry.</p> <p>Objectives of the Numerical model validation are:</p> <ul> <li>To understand the dominant factors which affects the spring-in phenomenon.</li> <li>To provide the simulation tool with the required values of the properties that influence on spring-in.</li> <li>To verify the simulation tool ability to predict spring-in for a variety of conditions.</li> <li>To develop a procedure of adapting and embedding sensors (dielectric and fiber optic) to obtain proper, useful and accurate signals of the manufacturing parameters (T, degree of cure, strain).</li> <li>To develop interpretation procedures of the signal/curves of sensors to obtain on-line process monitoring information.</li> </ul> <p>To obtain the data to feed and develop the numerical tool able to estimate the component distortions after its manufacturing, a combination of Fiber Optic Sensors (FOS) based on Fiber Bragg Grating (FBG) technology, Dielectric Curing sensors (DC) and 3D scanning were used to monitor the composite coupon manufacturing and the distortions the days after being demoulded. During the manufacturing process embedded FBGs and DC sensors were used to monitor the coupon temperature and strain distribution and resin curing evolution. After the manufacturing and the demolding, the distortions evolution were monitored by the embedded FBGs and by 3D CMM measurements.</p> <p><strong>In the ELADINE project, the distortion monitoring was made to two Out-of-Autoclave manufacturing technologies: liquid resin infusion and oven cured Pre-Preg (PP)</strong>. For both material systems, slightly curved coupons and C-shaped coupons were the geometries selected as representative for the Skin and spars of the wing box. The Skin coupon was curved panel with a 1475 mm radius (with edge rise of 7,65 mm) that was thought to best replicate the wing profile geometry. The C-spar coupon geometry selected for the study was a non-tapered spar section with two different angle with radius of curvature of 5mm and 12mm. This geometry was chosen to simplify measuring and comparisons with wing demo. Furthermore, three different thickness are studied for the Skin coupons and two for the C-spar coupons which were selected from different zones along the wing. Moreover, a C-spar coupon with variable thickness was studied, as a simulation of the transition between zones with different thickness in the wing.</p> <p><strong>In this dataset, the data obtained from the FBGs, DCs and 3D CMM meassurements during a PP manufacturing process and spring-in distortions monitoring can be found.</strong></p>
Interview to Giuseppe Attardi by Carlo Montengero about CMM (Pisa, 27 Nov 2021)
<p>Interview to Giuseppe Attardi by Carlo Montangero about <a href="https://www.wikidata.org/wiki/Q109375562">Customisable Memory Manager</a> - conservative garbage collector for C++ developed for PoSSo (Polynomial System Solver) project (Pisa, 27 Nov 2021).</p> <p> </p> <p>Source code available at <a href="https://archive.softwareheritage.org/swh:1:dir:557869d98df80317f2d7835460388cfc41414aa5;origin=https://github.com/Unipisa/CMM;visit=swh:1:snp:9dabc2692c9a6032b81f31676af04a487d95ebb3;anchor=swh:1:rev:c0f12bb6f3ea8f1350371695b42990a5c2eb93f2">Software Heritage Archive</a>.</p> <p><a href="https://github.com/Unipisa/CMM-Workbench/blob/04fb81752a5fa80376be61107c6ce66eb396182b/additional-materials/newItems/interview_transcription.md">Tentative transcription here</a>.</p> <p> </p>
FIGURE 2. CMM-V-10108, a in A Miocene cetacean vertebra showing a partially healed longitudinal shear-compression fracture, possibly the result of domoic acid toxicity or failed predation
FIGURE 2. CMM-V-10108, a Miocene pathological cetacean vertebra associated with the one shown in Figures 5 and 6. A. Anterior view showing a major shear-compression fracture with comminution. B. right lateral view, and C. posterior view showing the intact fused epiphysis.
FIGURE 3. CMM-V-10108 in A Miocene cetacean vertebra showing a partially healed longitudinal shear-compression fracture, possibly the result of domoic acid toxicity or failed predation
FIGURE 3. CMM-V-10108, shear-fractured Miocene cetacean lumbar vertebra in three transverse CT-scan images. These CT-scan images cut through the vertebra in an anterodorsal-posteroventral direction. A. CT-scan image through the anterior portion of the vertebra showing the wide-open lumen of the shear-compression fracture. B. CT-scan image from approximately 1 cm behind A, showing the thickness of the periosteal reactive bone layer. C. CT-image at about the midpoint in the length of the vertebra showing the posterior-most part of the sheared base of the centrum compressed (telescoped) into the body of the centrum.
FIGURE 7. CMM-V-8522 in A Miocene cetacean vertebra showing a partially healed longitudinal shear-compression fracture, possibly the result of domoic acid toxicity or failed predation
FIGURE 7. CMM-V-8522, Otodus megalodon lower anterior tooth in labial view. This tooth was found touching one of the two pathological vertebrae (CMM-V-10108). Notice the spall-fracture marking the tip of the tooth. White scale bar equals 10 mm.
FIGURE 6. CMM-V-10108, a in A Miocene cetacean vertebra showing a partially healed longitudinal shear-compression fracture, possibly the result of domoic acid toxicity or failed predation
FIGURE 6. CMM-V-10108, a second Miocene pathological cetacean vertebra (also shown in Figure 5) associated with the one shown in Figures 2-4. A. CT-scan image towards the anterior end of the vertebra. B. CT-scan image at about the midpoint in the length of the vertebra showing the thickness of the periosteal reactive bone.
FIGURE 5. CMM-V-10108, a in A Miocene cetacean vertebra showing a partially healed longitudinal shear-compression fracture, possibly the result of domoic acid toxicity or failed predation
FIGURE 5. CMM-V-10108, a second Miocene pathological cetacean vertebra (CT-scans shown in Figure 6) associated with the one shown in Figures 2-4. A. Posterior view showing that the neural spine is incomplete and that the sides of the centrum are covered with periosteal reactive bone. B. ventral view to highlight the periosteal reactive bone. In B, the anterior end of the centrum is up.
FIGURE 4. CMM-V-10108, a in A Miocene cetacean vertebra showing a partially healed longitudinal shear-compression fracture, possibly the result of domoic acid toxicity or failed predation
FIGURE 4. CMM-V-10108, a single CT-scan image in the sagittal plane of a Miocene pathological cetacean vertebra in left lateral view showing the broken lower portion of the centrum, the displaced piece of bone, and the new bone growth (periosteal reactive bone ventrally).
Comparison of 10 kHz SCS Combined With CMM to CMM Alone in the Treatment of Neuropathic Limb Pain
ClinicalTrials.gov study NCT03228420. IPD Sharing: Not stated. Countries: 1. Publications: 9.
FIGURE 27. Chromaphyosemion punctulatum from collection locality CMM 20 in Description of three new species of the genus Chromaphyosemion Radda, 1971 (Cyprinodontiformes: Nothobranchiidae) from the coastal plains of Cameroon with a preliminary review of the Chromaphyosemion splendopleure complex
FIGURE 27. Chromaphyosemion punctulatum from collection locality CMM 20, not preserved. Photographed directly after collection.
FIGURE 24. Chromaphyosemion punctulatum from collection locality CMM 18 in Description of three new species of the genus Chromaphyosemion Radda, 1971 (Cyprinodontiformes: Nothobranchiidae) from the coastal plains of Cameroon with a preliminary review of the Chromaphyosemion splendopleure complex
FIGURE 24. Chromaphyosemion punctulatum from collection locality CMM 18, not preserved. Photographed after some months in the aquarium. Photo by W. Eigelshofen
FIGURE 28. Chromaphyosemion punctulatum from collection locality CMM 22 in Description of three new species of the genus Chromaphyosemion Radda, 1971 (Cyprinodontiformes: Nothobranchiidae) from the coastal plains of Cameroon with a preliminary review of the Chromaphyosemion splendopleure complex
FIGURE 28. Chromaphyosemion punctulatum from collection locality CMM 22, not preserved. Photographed after some months in the aquarium. Photo by W. Eigelshofen
FIGURE 29. Chromaphyosemion punctulatum from collection locality CMM 23 in Description of three new species of the genus Chromaphyosemion Radda, 1971 (Cyprinodontiformes: Nothobranchiidae) from the coastal plains of Cameroon with a preliminary review of the Chromaphyosemion splendopleure complex
FIGURE 29. Chromaphyosemion punctulatum from collection locality CMM 23, not preserved. Photographed directly after collection.
FIGURE 4. Chromaphyosemion koungueense, male from the locality CMM 8 in Description of three new species of the genus Chromaphyosemion Radda, 1971 (Cyprinodontiformes: Nothobranchiidae) from the coastal plains of Cameroon with a preliminary review of the Chromaphyosemion splendopleure complex
FIGURE 4. Chromaphyosemion koungueense, male from the locality CMM 8, not preserved. Photographed after some months in the aquarium. Photo by W. Eigelshofen
Comparison of HF10 Therapy Combined With CMM to CMM Alone in the Treatment of Non-Surgical Refractory Back Pain
ClinicalTrials.gov study NCT03680846. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Post-market, Randomized, Controlled, Prospective Study Evaluating Intrathecal Pain Medication (IT) Versus Conventional Medical Management (CMM) in the Non-cancer, Refractory, Chronic Pain Population
ClinicalTrials.gov study NCT04096391. IPD Sharing: NO. Countries: 1. Publications: 3.
The Online Motivations and Adjustment Mechanisms of "Verbal Aphasiacs" from the Perspective of CMM Theory
Open the record for dataset details and reuse information.
Comparison of DTM™ SCS Therapy Combined With Conventional Medical Management (CMM) to CMM Alone in the Treatment of Intractable Back Pain Subjects Without Previous History of Lumbar Spine Surgery
ClinicalTrials.gov study NCT06442410. IPD Sharing: NO. Countries: 4. Publications: 0.
A Pilot Study to Evaluate the Efficacy of ITDD vs. CMM in the Treatment of Pancreatic Cancer Pain
ClinicalTrials.gov study NCT02578459. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
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