{"id":"https://openalex.org/W813129792","doi":null,"title":"Axial fatigue of /0, +30, and -30 deg/6s graphite/epoxy","display_name":"Axial fatigue of /0, +30, and -30 deg/6s graphite/epoxy","publication_year":1976,"publication_date":"1976-01-01","ids":{"openalex":"https://openalex.org/W813129792","mag":"813129792"},"language":"en","primary_location":{"id":"mag:813129792","doi":null,"is_oa":false,"landing_page_url":"https://ntrs.nasa.gov/search.jsp?R=19760060097","pdf_url":null,"source":{"id":"https://openalex.org/S4306402118","display_name":"NASA Technical Reports Server (NASA)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4210124779","host_organization_name":"National Aeronautics and Space Administration","host_organization_lineage":["https://openalex.org/I4210124779"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":null},"volume":null,"type":"article","is_traditional":true,"indexed_in":[],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5113669763","display_name":"S. V. Ramani","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1280536761","display_name":"Ames Research Center","ror":"https://ror.org/02acart68","country_code":"US","type":"facility","lineage":["https://openalex.org/I1280536761","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"S. Ramani","raw_affiliation_strings":["NASA Ames Research Center Moffett Field, CA, United States"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NASA Ames Research Center Moffett Field, CA, United States","institution_ids":["https://openalex.org/I1280536761"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5113456548","display_name":"Dell P. Williams","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I1280536761","display_name":"Ames Research Center","ror":"https://ror.org/02acart68","country_code":"US","type":"facility","lineage":["https://openalex.org/I1280536761","https://openalex.org/I4210124779"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"D. P. Williams","raw_affiliation_strings":["NASA  Ames Res. Center Moffett Field, Calif., United States"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"NASA  Ames Res. Center Moffett Field, Calif., United States","institution_ids":["https://openalex.org/I1280536761"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I1280536761"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":1,"citation_normalized_percentile":{"value":0.15758641,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10219","display_name":"Mechanical Behavior of Composites","score":0.9955999851226807,"subfield":{"id":"https://openalex.org/subfields/2211","display_name":"Mechanics of Materials"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10219","display_name":"Mechanical Behavior of Composites","score":0.9955999851226807,"subfield":{"id":"https://openalex.org/subfields/2211","display_name":"Mechanics of Materials"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10396","display_name":"Fatigue and fracture mechanics","score":0.003700000001117587,"subfield":{"id":"https://openalex.org/subfields/2211","display_name":"Mechanics of Materials"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11664","display_name":"Fiber-reinforced polymer composites","score":9.999999747378752e-05,"subfield":{"id":"https://openalex.org/subfields/2210","display_name":"Mechanical Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/axial-fatigue","display_name":"axial fatigue","score":0.9679999947547913},{"id":"https://openalex.org/keywords/carbon-fiber-epoxy-composites","display_name":"carbon/epoxy composites","score":0.9139999747276306},{"id":"https://openalex.org/keywords/angle-ply-laminates","display_name":"angle-ply laminates","score":0.9419999718666077},{"id":"https://openalex.org/keywords/cyclic-loading","display_name":"cyclic loading","score":0.6269999742507935},{"id":"https://openalex.org/keywords/stress-ratio-effects","display_name":"stress ratio effects","score":0.7009999752044678},{"id":"https://openalex.org/keywords/strength-degradation","display_name":"strength degradation","score":0.7009999752044678},{"id":"https://openalex.org/keywords/modulus-degradation","display_name":"modulus degradation","score":0.7360000014305115},{"id":"https://openalex.org/keywords/failure-modes","display_name":"failure modes","score":0.7310000061988831},{"id":"https://openalex.org/keywords/fractography","display_name":"fractography","score":0.8370000123977661},{"id":"https://openalex.org/keywords/mean-stress-effects","display_name":"mean stress effects","score":0.5009999871253967}],"concepts":[{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.832811713218689},{"id":"https://openalex.org/C166595027","wikidata":"https://www.wikidata.org/wiki/Q143983","display_name":"Epoxy","level":2,"score":0.7991354465484619},{"id":"https://openalex.org/C159985019","wikidata":"https://www.wikidata.org/wiki/Q181790","display_name":"Composite material","level":1,"score":0.7365292310714722},{"id":"https://openalex.org/C112950240","wikidata":"https://www.wikidata.org/wiki/Q76005","display_name":"Ultimate tensile strength","level":2,"score":0.6479905247688293},{"id":"https://openalex.org/C61039299","wikidata":"https://www.wikidata.org/wiki/Q5198231","display_name":"Cyclic stress","level":2,"score":0.6162562966346741},{"id":"https://openalex.org/C43369102","wikidata":"https://www.wikidata.org/wiki/Q2307625","display_name":"Fracture (geology)","level":2,"score":0.6108366250991821},{"id":"https://openalex.org/C2779698641","wikidata":"https://www.wikidata.org/wiki/Q5309","display_name":"Graphite","level":2,"score":0.5892746448516846},{"id":"https://openalex.org/C131850400","wikidata":"https://www.wikidata.org/wiki/Q1172868","display_name":"Fatigue limit","level":2,"score":0.5793692469596863},{"id":"https://openalex.org/C2776631189","wikidata":"https://www.wikidata.org/wiki/Q1128169","display_name":"Metallography","level":3,"score":0.5517862439155579},{"id":"https://openalex.org/C21036866","wikidata":"https://www.wikidata.org/wiki/Q181767","display_name":"Stress (linguistics)","level":2,"score":0.4845687448978424},{"id":"https://openalex.org/C2985278600","wikidata":"https://www.wikidata.org/wiki/Q65051469","display_name":"Fatigue testing","level":2,"score":0.4449312090873718},{"id":"https://openalex.org/C30407753","wikidata":"https://www.wikidata.org/wiki/Q186191","display_name":"Compressive strength","level":2,"score":0.4140126705169678},{"id":"https://openalex.org/C87976508","wikidata":"https://www.wikidata.org/wiki/Q1498213","display_name":"Microstructure","level":2,"score":0.2857065796852112},{"id":"https://openalex.org/C41895202","wikidata":"https://www.wikidata.org/wiki/Q8162","display_name":"Linguistics","level":1,"score":0.0},{"id":"https://openalex.org/C138885662","wikidata":"https://www.wikidata.org/wiki/Q5891","display_name":"Philosophy","level":0,"score":0.0}],"mesh":[],"locations_count":1,"locations":[{"id":"mag:813129792","doi":null,"is_oa":false,"landing_page_url":"https://ntrs.nasa.gov/search.jsp?R=19760060097","pdf_url":null,"source":{"id":"https://openalex.org/S4306402118","display_name":"NASA Technical Reports Server (NASA)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I4210124779","host_organization_name":"National Aeronautics and Space Administration","host_organization_lineage":["https://openalex.org/I4210124779"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":null}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"pdf":false,"grobid_xml":false},"content_urls":null,"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W2023213192","https://openalex.org/W433311443","https://openalex.org/W2119072807","https://openalex.org/W268928290","https://openalex.org/W2022983211","https://openalex.org/W1491286305","https://openalex.org/W1972291710","https://openalex.org/W2090796268","https://openalex.org/W1021610853","https://openalex.org/W1522632473"],"abstract_inverted_index":{"Results":[0],"are":[1,64,119],"presented":[2],"for":[3,58],"an":[4],"investigation":[5],"carried":[6],"out":[7],"on":[8],"a":[9,52],"/0,":[10],"+30,":[11],"and":[12,34,40,66,71,77,99],"-30":[13],"deg/6s":[14],"graphite/epoxy":[15],"angle-ply":[16],"laminate":[17,84],"in":[18],"order":[19],"to":[20,26,31,35,73,88],"characterize":[21],"the":[22,37,83,107],"overall":[23],"fatigue":[24,47,90],"behavior,":[25],"evaluate":[27],"strength/moduli":[28],"degradation":[29],"due":[30],"cyclic":[32,55,93],"loading,":[33],"identify":[36],"failure":[38,75,111,117],"modes":[39,76],"mechanisms.":[41,78],"The":[42],"specimen":[43],"life":[44],"determined":[45],"from":[46],"tests":[48],"is":[49,80,86],"measured":[50],"as":[51],"function":[53],"of":[54,109,115],"stress":[56,60],"amplitude":[57],"various":[59],"ratios.":[61],"Fractured":[62],"specimens":[63],"sectioned":[65],"examined":[67],"by":[68],"conventional":[69],"metallography":[70],"SEM":[72],"reveal":[74],"It":[79],"shown":[81],"that":[82],"studied":[85],"susceptible":[87],"axial":[89],"failures":[91],"under":[92],"loading":[94],"which":[95],"involves":[96],"both":[97],"tensile":[98],"compressive":[100],"mean":[101],"stresses.":[102],"Fracture":[103],"surface":[104],"observations":[105],"indicate":[106],"occurrence":[108],"complex":[110],"modes.":[112],"A":[113],"variety":[114],"local":[116],"mechanisms":[118],"identified.":[120]},"counts_by_year":[],"updated_date":"2026-11-01T11:40:01.658920","created_date":"2016-06-24T00:00:00"}