{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,17]],"date-time":"2026-02-17T14:19:41Z","timestamp":1771337981321,"version":"3.50.1"},"reference-count":19,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2021,7,6]],"date-time":"2021-07-06T00:00:00Z","timestamp":1625529600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007706","name":"Ministero dello Sviluppo Economico","doi-asserted-by":"publisher","award":["CUP: B98C15000410008"],"award-info":[{"award-number":["CUP: B98C15000410008"]}],"id":[{"id":"10.13039\/501100007706","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The purpose of this work is to compare the co-bonding vs. cold-bonding route on the adhesive joint performance of a CFRP (Carbon Fiber Reinforced Polymer) laminate\u2013aluminum connection. In particular, the overlap shear, tensile strength and Mode I and Mode II fracture toughness will be evaluated. The adhesives for co-bonding and cold-bonding are, respectively, a thermosetting modified epoxy, unsupported structural film and a two-component epoxy adhesive, chosen as representative of applications in the high-performance\/race car field. The emerging trend is that, in tensile e Mode I fracture tests, the failure path is predominantly in the composite. Mode II fracture tests instead resulted in a cohesive fracture, meaning that, under pure shear loading, the weakest link may not be the composite. The lap-shear tests are placed midway (cohesive failure for co-bonding and composite delamination for cold-bonding, respectively), probably due to the different peel stress values related to the different adhesive Young\u2019s modulus. The exploitation of the full capacity of the adhesive joint, hence the possibility of highlighting better, different performances of co-bonding vs. cold-bonding, would require consistent improvement of the out-of-plane strength of the CFRP laminate and\/or to someway redistribute the peel stress on the bondline.<\/jats:p>","DOI":"10.3390\/ma14143778","type":"journal-article","created":{"date-parts":[[2021,7,6]],"date-time":"2021-07-06T11:36:44Z","timestamp":1625571404000},"page":"3778","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Comparison of Tensile Strength and Fracture Toughness of Co-Bonded and Cold-Bonded Carbon Fiber Laminate-Aluminum Adhesive Joints"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4661-3799","authenticated-orcid":false,"given":"Fabrizio","family":"Moroni","sequence":"first","affiliation":[{"name":"Dipartimento di Ingegneria e Architettura, Universit\u00e0 di Parma, Parco Area delle Scienze, 181\/A, 43124 Parma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0533-1805","authenticated-orcid":false,"given":"Alessandro","family":"Pirondi","sequence":"additional","affiliation":[{"name":"Dipartimento di Ingegneria e Architettura, Universit\u00e0 di Parma, Parco Area delle Scienze, 181\/A, 43124 Parma, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chiara","family":"Pernechele","sequence":"additional","affiliation":[{"name":"Dallara Automobili, Via Provinciale, 33, 43040 Varano Melegari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luca","family":"Vescovi","sequence":"additional","affiliation":[{"name":"Dallara Automobili, Via Provinciale, 33, 43040 Varano Melegari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,7,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Camanho, P.P., and Tong, L. (2011). Composite Joints and Connections, Woodhead Publishing.","DOI":"10.1533\/9780857094926"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Vassilopoulos, A.P. (2015). Fatigue and Fracture of Adhesively Bonded Composite Joints, Woodhead Publishing.","DOI":"10.1016\/B978-0-85709-806-1.00008-2"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"29","DOI":"10.1016\/0010-4361(82)90168-9","article-title":"Review of the Strength of Joints in Fibre-Reinforced Plastics: Part 2. Adhesively bonded joints","volume":"13","author":"Matthews","year":"1982","journal-title":"Composites"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"219","DOI":"10.1080\/00218468908048207","article-title":"Strength Predictions for Lap Joints, Especially with Composite Adherends. A Review","volume":"30","author":"Adams","year":"1989","journal-title":"J. Adhes."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"511","DOI":"10.1080\/00218464.2013.850424","article-title":"Adhesion properties of bonded composite-to-Aluminium joints using peel tests","volume":"90","author":"Sinke","year":"2014","journal-title":"J. Adhes."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2","DOI":"10.1016\/j.engfailanal.2015.05.023","article-title":"Failure analysis of adhesively-bonded skin-to-stiffener joints: Metal\u2013metal vs. composite\u2013metal","volume":"56","author":"Sinke","year":"2015","journal-title":"Eng. Fail. Anal."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1115\/1.4027647","article-title":"Delamination Under Fatigue Loads in Composite Laminates: A Review on the Observed Phenomenology and Computational Methods","volume":"66","author":"Bak","year":"2014","journal-title":"Appl. Mech. Rev."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"143","DOI":"10.1016\/j.compstruct.2019.02.014","article-title":"Numerically-based method for fracture characterization of Mode I-dominated two-dimensional delamination in FRP laminates","volume":"214","author":"Vassilopoulos","year":"2019","journal-title":"Comp. Struct."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"103322","DOI":"10.1016\/j.mechmat.2020.103322","article-title":"Progressive damage modeling of composite materials subjected to mixed mode cyclic loading using cohesive zone model","volume":"143","year":"2020","journal-title":"Mech. Mat."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"1137","DOI":"10.1007\/s10443-016-9575-3","article-title":"Co-Curing of CFRP-Steel Hybrid Joints Using the Vacuum Assisted Resin Infusion Process","volume":"24","author":"Streitferdt","year":"2017","journal-title":"Appl. Compos. Mater."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"111789","DOI":"10.1016\/j.compstruct.2019.111789","article-title":"Effects of elevated temperatures on mechanical behavior of epoxy adhesives and CFRP-steel hybrid joints","volume":"235","author":"Kea","year":"2020","journal-title":"Comp. Struct."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1016\/j.ijadhadh.2018.06.008","article-title":"Surface treatment of CFRP: Influence on single lap joint performances","volume":"85","author":"Sorrentino","year":"2018","journal-title":"Int. J. Adhes. Adhes."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1016\/j.compositesb.2018.06.009","article-title":"Multi-material adhesive joints for automotive industry","volume":"151","author":"Banea","year":"2018","journal-title":"Comp. B"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Kupski, J., and Teixeira de Freitas, S. (2021). Design of adhesively bonded lap joints with laminated CFRP adherends: Review, challenges and new opportunities for aerospace structures. Comp. Struct.","DOI":"10.1016\/j.compstruct.2021.113923"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"107363","DOI":"10.1016\/j.compositesb.2019.107363","article-title":"Review on techniques to improve the strength of adhesive joints with composite adherends","volume":"177","author":"Shang","year":"2019","journal-title":"Comp. B"},{"key":"ref_16","first-page":"294","article-title":"Comparison of tensile strength and fracture toughness under mode I and II loading of co-cured and co-bonded CFRP joints","volume":"47","author":"Moroni","year":"2019","journal-title":"Frat. Integrit\u00e0 Strutt."},{"key":"ref_17","first-page":"516","article-title":"Influence of material and manufacturing technology on the failure behavior of composite laminate bonded joints","volume":"18","author":"Moroni","year":"2019","journal-title":"Proc. Struct. Integr."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"480","DOI":"10.1080\/00218464.2010.484300","article-title":"Local Stress Analysis of the Fatigue Behaviour of Adhesively Bonded Thick Composite Laminates","volume":"86","author":"Bernasconi","year":"2010","journal-title":"J. Adhes."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"A17","DOI":"10.1115\/1.4009336","article-title":"The stresses in cemented joints","volume":"11","author":"Goland","year":"1944","journal-title":"J. Appl. 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