Failure Investigation of a Multi-hopper Steel Silo

2022 ◽  
Author(s):  
Swarup Ranjan Debbarma ◽  
Debashis Das ◽  
Abhishek Kumar ◽  
Dayamay Bouri ◽  
Sumanta Banerjee ◽  
...  
Keyword(s):  
Failure Investigation

Qualitative assessment of equipment failure cause finding and removal

2018 ◽  
pp. 116-126
Author(s):  
E. A. Vakulin ◽  
A. I. Zayats ◽  
V. A. Beklemeshev ◽  
V. A. Ivashkevich ◽  
V. A. Khazhiev ◽  
...  
Keyword(s):  
Production Condition ◽  
Real Life ◽  
Open Pit Mine ◽  
Qualitative Assessment ◽  
Open Pit ◽  
Quality Level ◽  
Equipment Failure ◽  
Operation Conditions ◽  
Failure Investigation

Investigation of failures is one of the critical activities of mining and haulage equipment operability assurance in mining. Maintaining failure investigation at the required quality level, it is possible to identify provisions, rules and procedures that should be revised or changed, operation conditions that should be improved, additional personnel training, if required, etc. Investigation of failures in mines is under responsibility of machine men and electricians of maintenance and operation services. In reality, factory management and setup for production condition weak concernment of these workers in quality investigation aimed at finding of sources of equipment failures. This article describes real-life results achieved in development and use of maintenance service operation, technology and management monitoring. The requirements are substantiated for quality improvement in failure cause finding and removal in mining and haulage equipment at Chernogorsky open pit mine, SUEK-Khakassia. Causes of the present quality of failure investigation by machine men of Chernogorsky Repair and Engineering Works and Chernogorsky open pit mine are revealed. The proposed recommended practices will improve quality of mining and haulage equipment failure investigation.

Failure Investigation of an Airline Engine Failure During Take Off

2013 ◽  
Vol 50 (12) ◽  
pp. 821-830
Author(s):  
K. Andersson ◽  
R. Pederson ◽  
B. Pettersson ◽  
U. Klement
Keyword(s):  
Failure Investigation ◽  
Engine Failure

Metallurgical Failure Investigation of Overheated and Fractured Investment Cast Nickel-base Bolts Made of Inconel 939

2013 ◽  
Vol 50 (7) ◽  
pp. 501-512
Author(s):  
S. Leggemann ◽  
E. Cagliyan ◽  
S. Riesenbeck ◽  
A. Neidel
Keyword(s):  
Failure Investigation ◽  
Investment Cast ◽  
Nickel Base

Failure Localization in a Multistage S-Band Power Amplifier

2016 ◽  
Author(s):  
Clarence Rebello ◽  
Ted Kolasa ◽  
Parag Modi
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Fault Tree ◽  
Root Cause ◽  
Failure Investigation ◽  
Band Power ◽  
Cause Of Failure ◽  
Design Materials ◽  
Board Level ◽  
Failure Localization

Abstract During the search for the root cause of a board level failure, all aspects of the product must be revisited and investigated. These aspects encompass design, materials, and workmanship. In this discussion, the failure investigation involved an S-Band Power Amplifier assembly exhibiting abnormally low RF output power where initial troubleshooting did not provide a clear cause of failure. A detailed fault tree drove investigations that narrowed the focus to a few possible root causes. However, as the investigation progressed, multiple contributors were eventually discovered, some that were not initially considered.

scholarly journals Malignant triton tumor of the left thoracic cavity: a case report

2019 ◽  
Vol 2019 (8) ◽  
Author(s):  
Masashi Ishikawa ◽  
Hiroyuki Chou ◽  
Naoto Imamura ◽  
Yumeta Shimazu ◽  
Kazuo Ono
Keyword(s):  
Tumor Resection ◽  
Neurofibromatosis Type ◽  
Large Mass ◽  
Surgical Removal ◽  
Thoracic Cavity ◽  
Left Hemithorax ◽  
Malignant Triton Tumor ◽  
Nerve Sheath Tumors ◽  
Peripheral Nerve Sheath Tumors ◽  
Failure Investigation

Abstract Malignant triton tumor (MTT) is a rare subtype of malignant peripheral nerve sheath tumors with rhabdomyoblastic differentiation. Although the condition may manifest sporadically, it typically affects adult patients with neurofibromatosis type 1. In this article, an extremely rare case of MTT with chest wall origin, which expanded into the left thoracic cavity, is reported. A 64-year-old male was admitted to the institution with sudden shortness of breath. Radiological examination revealed a large mass with massive pleural effusion occupying the patient’s left hemithorax. A percutaneous needle biopsy was performed and the patient underwent subtotal tumor resection with left pleuropneumonectomy. Immunohistochemical study of postsurgical pathologic specimens confirmed the diagnosis of MTT. Despite extensive surgical removal, tumor recurrence was reported soon after resection, leading to patient’s death 20 days after surgery due to acute respiratory failure. Investigation of rare MTT cases is necessary for understanding this condition.

scholarly journals Investigation of Failure in Gas Turbines: Part 2 — Engineering and Metallographic Aspects of Failure Investigation

1993 ◽  
Author(s):  
Robert E. Dundas
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Heavy Duty ◽  
Metallographic Examination ◽  
Fracture Surfaces ◽  
Failure Investigation ◽  
Materials Used ◽  
Component Failures

This paper opens with a discussion of the various mechanisms of cracking and fracture encountered in gas turbine failures, and discusses the use of metallographic examination of crack and fracture surfaces. The various types of materials used in the major components of heavy-duty industrial and aeroderivative gas turbines are tabulated. A collection of macroscopic and microscopic fractographs of the various mechanisms of failure in gas turbine components is then presented for reference in failure investigation. A discussion of compressor damage due to surge, as well as some overall observations on component failures, follows. Finally, a listing of the most likely types of failure of the various major components is given.

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