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Q1: AUM جامعة الـشـرق الأوسط الأمـريـكيـة American University of The Middle East Course Code/Title : ME290 Global Eng. Prof. Seminar ME290 Assessment-4 (10%) Section Number H NOTES: Instructor Name : Dr. Ali Dinc Semester/Year : Spring 2023 Assignment/Homework/Project Report Title: The purpose of using Engineering Standards Due Date: 08 May 2023 (upload to Moodle as word file) as group of 2 students. Student 2: Similarity check will be done on this assessment (penalty points to be deducted). Therefore, Handwriting is not allowed. You should type in MS word (or pdf). *(you can delete all the questions and write only the answers to reduce/avoid similarity) Student Name and Number Student 1: Student declaration: By writing my/our names above, l/we attest that I/we have done this assessment /homework/ assignment with the group members written above. I understand that any act of plagiarism will be treated as an academic misconduct for which provisions stipulated in the Student Code of Conduct should apply. ● Based on the lecture (Chapter5 Engineering Standards and Professional Societies): Write an essay including both Part A and Part B by following APA Formatting and Style Guide for your report. Main body of report can be about 1-3 pages (excluding cover page, table of contents and references.): PART-A: "The purpose of using Engineering Standards" give detail information. PART-B: What are the typical Engineering Standards (provide names and numbers) required for a car design and manufacturing that Mechanical Engineers can use while working on an automotive project. ● AUM • Handwriting and Al are not acceptable due to requirement of similarity check in Turnitin. جامعة الشرق الأوسط الأمـريـكيـة 2 American University of The Middle East 3 4 Grading Scheme Item 1 Submission shall be uploaded to Moodle. You can use any APA style cover sheet and delete the questions/text of this document in your report to avoid similarity. Try to include references from AUM Online Library also. Quality and effectiveness of text (relevance with the topic, stating the point, clear ideas and expressions, quality of references etc.) Completeness of Text (required sections of Essay exists) Formatting in APA style and additional formatting instructions given in this document Grammar and typing Similarity and Al check (penalty points to be deducted) Total Weight 70% 20% 10% 100%See Answer
Q2: The picture shows a simplified schematic of a hoist system designed to move heavy things around. The design is composed of 5 1020-steel tubes, with rectangular cross-sections, labeled from A through E. Notice how the joints are also labeled, but from 1 through 9. Consider that a regular operational regime consists of moving a 200 kg element around while going over bumps and ramps which can introduce cyclic loads of up to 2g's of vertical acceleration. Assume that in a normal day of operations the hoist experiences 300 of such loading cycles. Here is what we know about this hoist design: 9 Simplified Model 0-2g E Z 500mm 6 8 A B 300mm 300mm D 800mm 1,700mm Junction 3 100mm Ho 1020 Steel Bo T Figure 1: Hoist System Side view of relevant member F 500mm Junction 3 1,700mm 1. 1020 rectangular thin-walled steel construction; 2. Outer height Ho = 80 mm, outer width B. = 60 mm, and thickness is T = 5 mm; 3. Required overall design factor of safety FOS = 2; 4. Fatigue knockdown factor (all together) K = 0.678; 8 5. Young's Modulus (E = 200 GPa); 6. Yield Strength (Sy = 350 MPa); 7. Ultimate Tensile Strength (Su = 700 MPa). A) The mean and alternating compressive stresses (mean-c) and (alt-c) without any factors. B) The factor of safety for large scale yielding in compression (Sy/max-c). C) The equivalent completely reversed stress in compression (eq-CR-C) for fa- tigue, including the fatigue stress concentration factor (KF). D) The factor of safety in fatigue in compression (SF/eq-CR-C). E) The mean and alternating tensile stresses (mean-t) and (alt-t) without any factors. F) The factor of safety for large scale yielding in tension (Sy/max-c). G) The equivalent completely reversed stress in tension (eq-CR-T) for fatigue, including the fatigue stress concentration factor (KF). H) The factor of safety in fatigue in tension (SF/Oeq-CR-C). I) The hoist service life in years (construct a S-N chart for the problem). Use the following charts to estimate the necessary coefficients for your calculations: • Stress concentration factor: Assume junction No. 3 can be approximated as a cross- section reduction and a fillet joint. For this case, use H/h = 1.5 and r/h = 0.05. • Notch sensitivity factor (q) for bending: Use the appropriate bending curves. K₁ Evaluate Junction No. 3 and determine: 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0 0.05 0.10 M 0.15 r/h o nom H Mc 6M I bh² 0.20 0.25 M 0.30 H/h=6 -2 1.2 1.05 1.01 (a) Bending Stress Concentration factor chart Notch sensitivity index, q 1.0 0.9 0.8 0.7 0.5 0.4 0.3 0.2 0.1 0 0 200 (400 Bhn) 180 (360 Bhn) 140 (280 Bhn) 120 (240 Bhn)- 100 (200 Bhn) 80 (160 Bhn) 80 (160 Bhn)60 (120 Bhn) 60 (120 Bhn) 50 (100 Bhn) 0.02 S for bending or axial loading, ksi S for torsional loading (tentative), ksi 0.04 0.08 0.10 Notch radius r, in. (b) Notch sensitivity factor chart Aluminum alloy (based on 2024-T6 data) 0.06 0.12 Steel 0.14 0.16See Answer

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